The GT-B is a radically customized Harley-Davidson Softail Breakout, built by Thunderbike, blending modern performance engineering with an unmistakable custom drag-bike stance.

Designed to push visual limits while remaining fully rideable, this build represents Thunderbike’s signature approach: precision, balance, and uncompromising style.

GT Wheels and Extreme Tire Setup

At the core of the GT-B’s aggressive look are the Thunderbike GT wheels, paired with a muscular tire configuration. The rear features a Metzeler Cruisetec 260/35VR21, delivering massive road presence and outstanding grip, while the front runs a Metzeler ME888F 130/60B23, ensuring stability and confident handling. This wheel and tire combination defines the bike’s stretched and powerful silhouette.

Single-Side Swingarm and Drivetrain Upgrades

The Thunderbike single-side swingarm kit (21″ aluminum) transforms the rear end into a true showpiece, exposing the wheel while enhancing structural rigidity. Power is transferred via a Thunderbike 1″ heavy-duty belt and a Grand Prix single-side pulley, engineered for durability and smooth performance under load.

Braking and Suspension Performance

Stopping power is upgraded with a Thunderbike Vegas floated brake disc (340 mm), combined with a brake caliper adapter (300→340 mm) for precise braking response. The front end is visually lowered using a Thunderbike tele fork lowering kit, reinforcing the bike’s low and aggressive stance.

Ride height and comfort are controlled through a Thunderbike air ride suspension kit, allowing the GT-B to sit slammed when parked and rise to optimal riding height on demand.

Bodywork and Aerodynamic Details

The bodywork is defined by clean, sharp lines. A Thunderbike GFK front fender (21″/23″) perfectly frames the oversized front wheel, while the GP-style long chin fairing adds a performance-inspired racing touch. Together, these elements enhance both aerodynamics and visual flow.

Controls, Ergonomics, and Rider Interface

The riding position is optimized with a Thunderbike forward control kit, including black mounting hardware, V-Tech rider footpegs, and an aluminum shift peg. A flat riser kit (2″) keeps the handlebar low and aggressive, while Thunderbike Base Rubber grips ensure comfort and control.

Rear visibility and minimalism are achieved using Motogadget mo.view Sport 150 mirrors in black, combined with Stripe LED turn signals neatly integrated into the design.

Intake, Covers, and Fine Details

Performance and aesthetics meet at the intake with the Thunderbike Oval Torque airbox cover and airbox kit, complemented by an EFI cover with manometer bracket in black wrinkle finish. Additional CNC-machined details include the Torque timer cover, axle covers for the swingarm and front axle, and multiple Thunderbike topper components that elevate the overall finish.

Clean Rear End and Lighting Solution

The rear of the GT-B remains exceptionally clean thanks to a Thunderbike inside license plate frame, complete with integrated lighting and reflector. This solution preserves legality while maintaining the bike’s minimalist custom appearance.

A Modern Custom Statement

The GT-B Thunderbike Breakout is more than a visual statement—it’s a carefully engineered custom motorcycle that combines aggressive design, premium components, and everyday usability. From its massive wheels and single-side swingarm to its air suspension and precision-machined details, every element reflects Thunderbike’s commitment to high-end custom craftsmanship.

Breakout parts

• Thunderbike GT Wheel
• Thunderbike GT Wheel
• Metzeler Cruisetec Rear Tire 260/35VR21 83V
• Metzeler ME888F Front Tire 130/60B23 M/C TL 65H
• Thunderbike Front Fender GFK 21′′/23′′
• Thunderbike Brake Disc Vegas Floated 340mm
• Thunderbike Brake Caliper Adapter 300->340mm, left black
• Thunderbike Tele Fork Lowering Kit
• Thunderbike Chin Fairing GP Style Long
• Thunderbike Single-Side Swingarm Kit 21′′ Alu
• Thunderbike Belt 1′′ heavy duty
• Thunderbike License Plate Frame Inside Plate
• Thunderbike License Plate Lighting
• Thunderbike Reflector Inside Plate
• Thunderbike Pulley Grand Prix Single Side
• Thunderbike Air Ride Suspension Kit
• Thunderbike Forward Control Kit black
• Thunderbike Mounting Kit Forward Controls
• Thunderbike Rider Footpegs V-Tech Design
• Thunderbike Shiftpeg Alu Design
• Thunderbike Grips Base Rubber
• Thunderbike Toppers Base
• Thunderbike Flat Riser Kit 2′′
• Thunderbike Headlamp Cap Alu raw
• Motogadget mo.view Sport 150 Mirror black
• Thunderbike Turn Signals Stripe LED with Housing
• Thunderbike Airbox Cover Oval Torque
• Thunderbike Airbox Kit Oval
• Thunderbike EFI Cover with Manometer Bracket black wrinkle
• Thunderbike Timer Cover Torque
• Thunderbike Axle Cover Swingarm left
• Thunderbike Front Axle Cover-Set

La entrada ‘GT-B’ – Harley-Davidson Softail Breakout by Thunderbike aparece primero en DARK KUSTOM.

IRON MESH is a striking reinterpretation of the Harley-Davidson Breakout 117, meticulously modified by Bündnerbike.

This custom cruiser delivers a powerful visual presence, advanced technology, and full road legality, making it as capable on the street as it is impressive at a standstill. Built for riders who value performance, design, and exclusivity, IRON MESH stands as a modern custom icon.

The extended fuel tank stretches the bike’s silhouette, giving it a longer, more aggressive stance while enhancing the sporty proportions of the Breakout 117. A flush-mounted pop-up fuel cap keeps the surface clean and uninterrupted, preserving the minimalist design while remaining practical and easy to use.

At the rear, the flowing fender seamlessly integrates the seat and LED lighting into a single, cohesive unit. The modern LED system provides excellent visibility with a distinctive light signature, while the slim tail section elegantly frames the wide rear tire and delivers a powerful, uncompromising rear view.

The fully adjustable air suspension, certified by FAKT, allows the seat height to be tailored for show, comfort, or sporty riding. When parked, the bike sits low for maximum visual impact, and once in motion, the suspension automatically raises to ensure optimal ground clearance. This system offers proven quality, reliability, and intelligent functionality without compromise.

A side-mounted license plate holder developed by Bündnerbike reinforces the clean and muscular look of the rear end. Custom-made and tool-free interchangeable, its minimalist design keeps the bike visually ordered and aggressive, free from unnecessary elements.

CNC-machined aluminum hand grips by Bündnerbike provide a secure grip, precise control, and a premium tactile feel. Their ergonomic shape and high-quality finish reflect the machine aesthetics that define this build. Matching CNC-machined foot pegs for both rider and passenger offer excellent stability and comfort, combining durability, functionality, and refined style.

The handcrafted leather seat features elegant diamond stitching and a sporty silhouette, delivering long-lasting comfort and a refined appearance. A distinctive detail is the stitching color, precisely matched to the green accents of the bike, subtly tying the entire design together and elevating the overall aesthetic.

A fully integrated passenger seat with backrest ensures ergonomic support and safety while maintaining the custom look. It offers true touring comfort without sacrificing the clean, performance-oriented design of the motorcycle.

Performance and sound come together through the combination of a KessTech electronically controlled exhaust system and a Bündnerbike high-performance air filter. The KessTech exhaust offers variable sound characteristics at the push of a button, ranging from discreet to aggressive, while remaining fully street legal thanks to EC and ABE certification. The specially developed Bündnerbike air filter maximizes airflow and noticeably improves performance, combining technical efficiency with a bold visual presence.

Together, the intake and exhaust form a perfectly balanced system, delivering unrestricted airflow on intake and adjustable sound on exhaust. The result is a riding experience that can be precisely tuned both technically and acoustically, remaining legal, powerful, and truly unique.

Visually, IRON MESH is defined by the contrast between deep gloss black and vivid toxic green. The high-gloss black fuel tank is accented by a bold green Harley-Davidson logo, creating an instantly recognizable and iconic look. Matching green powder-coated engine covers are heat-resistant and precisely aligned with the tank design, emphasizing the build’s attention to detail and quality. Gloss black powder-coated wheels and components complete the finish, offering both elegant appearance and exceptional durability under demanding conditions.

IRON MESH is more than a custom Harley-Davidson Breakout 117. It is a statement of design, engineering, and controlled aggression, created for riders who demand individuality, performance, and presence in equal measure.

La entrada ‘IRON MESH’ – Harley-Davidson Breakout 117 by Bündnerbike aparece primero en DARK KUSTOM.

The TB-R 1 is a fully customized Thunderbike Harley-Davidson Breakout that combines premium parts, elegant design, and powerful road presence.

Built by Thunderbike, this Breakout showcases the brand’s unmistakable style with a focus on clean lines, high-quality components, and aggressive stance.

This custom Harley-Davidson Breakout is equipped with the Thunderbike Unbreakable wheels, giving the bike a bold and muscular appearance. The Thunderbike Fork/Front End Kit Unbreakable further enhances the look and handling, creating a perfectly balanced front profile. Forward riding comfort and ergonomics are improved with the Thunderbike Forward Control Kit Base Alu, designed for both performance and style.

The bike also features Thunderbike Phantom 1″ grips, offering excellent control and a refined feel at the handlebars. The Thunderbike Unbreakable headlight gives the front end a distinctive visual signature, while the Thunderbike license plate frame with inside mounting and dedicated plate lighting ensure a clean and minimalist rear design.

A Thunderbike PenHead LED turn signal set provides modern, compact lighting, seamlessly integrated into the build. The rear brake caliper cover with logo adds another custom detail, underlining the craftsmanship behind the project.

As for the paintwork, Ingo Kruse was once again commissioned to give the motorcycle its distinctive appearance, delivering a unique finish that defines the TB-R 1’s character. The headlight, toppers, and Thunderbike’s famous ribbed rocker boxes in bicolor are also newly added components, completing the exclusive look of this custom Breakout.

The TB-R 1 Thunderbike Harley-Davidson Breakout is a premium custom motorcycle built for riders who appreciate high-end craftsmanship, striking aesthetics, and unmistakable Thunderbike DNA.

H-D Breakout parts

• Wheels Thunderbike New Digger (21″ & 23″)
• Fuel Tank Thunderbike GP Style Alu
• Suspension Thunderbike Airride
• Triple Tree Thunderbike Grand Prix
• Handlebars Thunderbike Grand Prix Clip-On
• Aircleaner Thunderbike
• Exhaust Thunderbike (Custom)
• Rear Fender Thunderbike GP Style (GFK)
• Front Fender Thunderbike GP Style
• Headlamp H-D & Thunderbike Headlamp Cap
• Chin Fairing Thunderbike GP Style
• Swingarm Thunderbike Singleside
• Pulley Brake Kit Thunderbike
• Forward Controls Thunderbike V-Tech
• Grips Thunderbike Base Satin mit Toppers

La entrada Harley-Davidson Softail Breakout ‘TB-R1’ by Thunderbike aparece primero en DARK KUSTOM.

The custom scene continues to evolve, and few names resonate as strongly in the European custom world as Thunderbike.

Their latest creation, the Harley-Davidson Breakout “R v3.0”, is a stunning fusion of brute strength and precision engineering — a build that redefines the aggressive Softail silhouette with signature Thunderbike style.

At its core lies the OEM Harley-Davidson Softail Breakout frame, a solid foundation renowned for its muscular stance and smooth ride. But Thunderbike has taken it much further, upgrading nearly every visible and functional component with their premium custom parts.

The wheels are the unmistakable Thunderbike Unbreakable design — bold, sharp-edged, and impossible to ignore. They perfectly complement the matching Unbreakable front fork (Gabel), giving the bike a cohesive and high-performance front end.

The Thunderbike TBR fender and tank have also been seamlessly integrated, enhancing the bike’s aggressive lines while maintaining its Harley soul.

From top to bottom, the bike is equipped with Thunderbike’s best:

• Foot controls from the Thunderbike Base Alu series
• Phantom Base Alu grips, precision-milled for optimal control and feel

• Lamps from the Unbreakable line, continuing the bike’s unified design language
• A high-performance Unbreakable air cleaner, delivering both looks and power

Every element, from the smallest bolt to the massive wheels, reflects Thunderbike’s attention to detail and commitment to quality. The “R v3.0” isn’t just a custom bike — it’s a visual and mechanical statement built for those who demand more from their Harley-Davidson.

This is not just another Breakout — this is Thunderbike’s R v3.0. A road-dominating machine born from innovation, built to rule.

La entrada Harley Davidson Breakout ‘R v3.0’ by Thunderbike aparece primero en DARK KUSTOM.

Dale’s garage-built Harley-Davidson Breakout, known as ‘Cherry Corruption’, is not the kind of motorcycle that simply turns heads—it demands attention and leaves a lasting impression wherever it goes.

With a fully blacked-out attitude contrasted by a chrome-filled heart, the bike gleams like a piece of fine jewelry. This striking presence is amplified by the deep custom cherry red paint, masterfully applied by the renowned Tins by Frenchie, giving the machine a rich and unmistakable character.

The seat integrates seamlessly into the overall design, perfectly complementing the bike’s aggressive yet refined aesthetic. This detail is the work of Truline Trimming, a name that has firmly established itself as a cornerstone of Australia’s custom motorcycle scene.

Photography is handled by Grahamcollie Photography, whose work goes far beyond simple documentation. Through careful use of lighting, angles, and composition, the images highlight every curve, reflection, and mechanical detail of Cherry Corruption, capturing both its aggressive stance and refined craftsmanship.

Each shot emphasizes the contrast between the deep cherry red paint, the blacked-out components, and the chrome accents, bringing the bike’s personality to life and allowing its custom details to speak for themselves.

La entrada Cherry Corruption: A Brutal Custom Harley-Davidson Breakout aparece primero en DARK KUSTOM.

The “Trooper” is built on a Harley-Davidson Breakout and demonstrates just how far the production model can be elevated using high-end custom components.

Its engine, frame, and general layout provide a strong foundation, which has been enhanced with a consistently sporty configuration inspired by the Grand Prix series—topped off with a custom Iron Maiden–themed paint job that gives the bike its name. One of the key highlights is the introduction of the brand-new Pro Performance swingarm, developed specifically for wide Softail frames.

The Trooper retains the powerful cruiser DNA of the Breakout but receives a substantial upgrade in both style and technical capability.

Pro Performance Swingarm

From a technical standpoint, the Trooper sets new benchmarks. For the first time, the Breakout is equipped with the Pro Performance swingarm, a striking and highly engineered structure milled from solid aluminum. This advanced component replaces the original tubular swingarm, bringing a completely new visual and structural identity to the rear end.

The development focused on three primary goals:

• Maximum torsional rigidity
• Sport-oriented lines
• Minimal weight

Designed specifically for wide Softail frames, the solid swingarm arms are hollow-milled and reinforced with an additional cover—mirroring the construction philosophy of modern superbikes.

Its complex geometry is made possible only through state-of-the-art CNC machining, reflecting the high standards required for premium chassis components. As with all safety-relevant parts in the lineup, the Pro Performance swingarm comes with a TÜV certificate, making it a fully legal high-performance upgrade for riders who prioritize function, design, and quality.

Tank, Rear Section & Ergonomics

The bike features an in-house–designed GP aluminum tank, integrating essential components such as the fuel pump and sensors. Beyond its technical functionality, the tank enhances the bike’s silhouette with a shorter, more compact profile, sharp edges, and a dynamic transition into the seating position.

The rear fender and matching seat follow the same Grand Prix design philosophy. The compact fender incorporates discreet LED tail and brake lights, creating a clean and open rear view that highlights the wheel, swingarm, and drive system.

Up front, the GP-style triple clamp with increased rake works in combination with clip-on handlebars mounted directly to the fork stanchions. This setup results in a lower, more active riding posture and significantly improved front-end feedback.

Wheels, Brakes & Chassis

The Trooper rolls on wheels from the Vegas Cut series, known for their straight spokes and distinctive bolt detailing. The sizes remain true to the Breakout category—21″ front and 18″ rear—but both aesthetics and performance are completely redefined.

• At the rear, an integrated pulley brake with an inward-mounted disc reveals an unobstructed view of the wheel.
• At the front, an enlarged 340 mm Vegas Wave brake disc paired with radially mounted calipers delivers stronger braking performance and reinforces the bike’s sport-oriented concept.

Dark Styling

Powder-coated engine components and black DLC-coated fork stanchions contribute to the Trooper’s dark, technical appearance. DLC is among the highest-grade surface treatments available for fork tubes, offering superior durability, low friction, and premium aesthetics.

Fine Details From In-House Production

A wide range of proprietary components completes the transformation:

• Headlamp cap
• Side-mounted license plate holder
• GP front fender
• GP front spoiler
• GP rear fender with integrated turn signals
• Various precision-machined accessories

Each piece is designed to blend seamlessly into the overall concept, emphasizing clean lines and a technical look without appearing as standalone showpieces. The Trooper is not a random collection of custom parts—it is a cohesive, high-performance custom build.

Iron Maiden Paintwork

The paint scheme is a direct tribute to Iron Maiden’s “The Trooper”, created in collaboration with Chiko’s Pinstriping. The multi-layered design merges iconic Iron Maiden imagery with the Grand Prix visual language. The customer’s vision—to express the spirit of Iron Maiden—was perfectly realized in a unique and expressive finish.

• Thunderbike Vegas Cut Wheel
• Thunderbike Vegas Cut Wheel
• Metzeler Cruisetec Rear Tire 260/40VR18 M/C TL 84V
• Thunderbike Brake Disc Floated Wave Vegas 340mm
• Thunderbike Brake Disc Floated Wave Vegas 292mm
• Thunderbike Brake Caliper Adapter Radial 300->340mm left black
• Brembo M4 Radial Brake Caliper front left 108mm black
• Thunderbike Pulley Vegas polished
• Thunderbike Pulley Brake Kit
• Thunderbike Hydraulic clutch Conversion Kit black
• Thunderbike Belt guard black
• Thunderbike Front Axle Cover-Set
• Thunderbike License Plate Frame Inside Plate
• Thunderbike License Plate Lighting
• Thunderbike Reflector Inside Plate
• Thunderbike Rear Fender GP-Style 260 mm
• Thunderbike Seat Plate
• Thunderbike Lowering Kit Shock Stage 2 (30mm)
• Thunderbike Custom Alu Fuel Tank GP-Style
• Thunderbike Tank Mount black
• Thunderbike Chin Fairing GP Style Long
• Thunderbike Timer Cover New Custom
• Thunderbike Airbox Kit Oval
• Thunderbike Airbox Cover Oval TB-S
• Thunderbike Forward Control Kit Phantom long matte black
• Thunderbike Mounting Kit Forward Controls
• Thunderbike Shiftpeg & Brakepeg Satin
• Thunderbike Rider Footpegs V-Tech Design
• Thunderbike Triple Tree Kit Grand Prix bicolor
• Thunderbike Clip-On Handlebars Grand Prix bicolor
• Harley-Davidson Conventional Fork Tubes DLC black
• Thunderbike Turn Signal Load Equalizer
• Thunderbike Turn Signals Stripe LED with Housing
• Thunderbike Ignition Coil Relocation Kit black
• Thunderbike Headlamp Cap black
• Motogadget Mirror mo.view Race left
• Motogadget Mirror mo.view Race right
• Thunderbike Swingarm Pro Performance 260mm raw
• Thunderbike Brake caliper adapter Pro Performance Radial rear black
• Brembo Radial Brake Caliper rear 100mm black
• Thunderbike Front Fender GP
• Thunderbike Grips SP-S satin black cut
• Thunderbike Side Mount Licence Plate Bracket Medium Pro Alu black

La entrada Harley-Davidson Breakout FXBR ‘Trooper’ by Thunderbike aparece primero en DARK KUSTOM.

The H-D Cruiser Breakout 117 “Circuit Shadow” embodies the essence of technical sophistication, performance, and masculine elegance.

The name itself reflects its character — “Circuit” stands for precision, speed, and the dynamic bond between rider and machine, while “Shadow” highlights the deep, sculpted silhouette that gives this bike its distinctive presence.

Highlights & Specifications

Chassis & Suspension

• Air Ride Suspension (Bündnerbike): Infinitely adjustable in height and firmness, Swiss-approved.
• Upside-Down Fork (Rebuffini): 43 mm stanchions, 120 mm travel.
• Triple Tree (Rebuffini): CNC-milled to perfectly match the fork setup.
• Two-Piece Single-Sided Swingarm (Bündnerbike): Drive-side sandwich construction made of 6082 aluminum.
• Shortened Kickstand (Bündnerbike): For increased lean angle and cleaner stance.

Braking System

• Brake Adapters (Bündnerbike): CNC-machined for precise fitment of Rebuffini calipers.
• Front Brake (Rebuffini): 4-piston stainless steel monoblock calipers (Ø 32 mm) with 320 mm Galfer Disc Wave rotors.
• Rear Brake (Rebuffini): 4-piston stainless steel monoblock calipers (Ø 32 mm) with 260 mm Galfer Disc Wave rotors.

Drivetrain

• Pulley Drive System (Bündnerbike): Low-maintenance belt drive with custom ratio.
• Drive Belt (Bündnerbike): Reinforced Kevlar-rubber construction for high durability.

Wheels & Tires

• Rear Wheel: 18″ 3D CNC-milled monolithic wheel with central lock (Bündnerbike).
  • Tire: Metzeler Cruisetec 260/40 VR 18.
• Front Wheel: 21″ 3D lightweight CNC wheel (Bündnerbike).
  • Tire: Metzeler 130/60 B 21.

Controls & Instruments

• Drag Bar Handlebar (Bündnerbike): Steel-tube bar for an aggressive stance.
• Integrated LCD Speedometer (Harley-Davidson): Factory-fitted riser integration.
• Hand Controls (Rebuffini): CNC-machined, green anodized, fully adjustable.
• Grips (Bündnerbike): Ergonomic soft-rubber inserts for superior comfort.
• LED Indicators (Bündnerbike): Flush-mounted, full-LED design.
• 3D Mirrors (Rebuffini): CNC aluminum construction with ball-joint adjustability.

Seat & Foot Controls

• Diamond-Stitch Seat (Bündnerbike): Synthetic leather with contrast stitching and PU-core padding.
• Foot Controls (Bündnerbike): CNC-machined and foldable for both function and form.

Bodywork & Frame

• Custom Fuel Tank (Bündnerbike): Tailored design with flush-mounted gas cap.
• 3D Rear Fender (Bündnerbike): Integrated one-piece seat carrier and LED lighting.
• LED Lighting System (Bündnerbike): Fully integrated flush-mount design.
• Side-Mounted License Plate (Bündnerbike): CNC-milled bracket for a clean, minimal look.

Exhaust & Sound

• KessTech Exhaust System: Electronically controlled valve system with continuously adjustable resonance for optimized sound and performance.
• Headers (Bündnerbike): Custom-built, in-house modified and optimized for power delivery and tone.

Paint & Finish

The tank and rear fender shine in deep, high-gloss black, accentuated by a three-part central gray racing stripe that gives the bike a sporty and clean visual flow.
Both wheels and swingarm are high-gloss powder-coated, offering durability and a seamless aesthetic with the frame.
The engine is fully finished in deep black and treated with a special heat- and corrosion-resistant coating, ensuring lasting performance and consistent looks even under extreme riding conditions.

La entrada H-D Breakout 117 ‘Circuit Shadow’ by Bündnerbike aparece primero en DARK KUSTOM.

Thunderbike never misses when it comes to blending performance and design, and the Softail Breakout 117 ‘GP-Suzuka‘ is a perfect example of that precision.

Inspired by the spirit of the racetrack, this build pushes the limits of custom craftsmanship while maintaining the raw soul of Harley-Davidson.

This machine rolls on Thunderbike Grand Prix wheels — a 9.0×21 rear and 4.0×23 front, wrapped in Metzeler Cruisetec 260/35VR21 and ME888F 130/60B23 tires for an aggressive stance and unmatched grip. The Single-Side Swingarm Kit (21″ Alu) exposes that massive rear wheel, emphasizing the performance-driven design.

Braking is handled by a Thunderbike Streetmaster disc paired with a Brembo Radial Monoblock M4 caliper set for precise stopping power. The Triple Tree Kit Grand Prix 2.0 Performance and Stummellenker Set “GP 2.0” give the front end its race-ready attitude.

A Custom Aluminum Fuel Tank (GP-Style) and Airbox Cover Oval Grand Prix add clean, aerodynamic lines, while details like Phantom E Grips, Forward Controls Phantom Contrast Cut, and Stripe LED Turn Signals bring modern performance to the forefront.

Finishing touches such as Motogadget mo.view Race mirrors, Derby & Timer Covers (Drilled), and Hydraulic Clutch Conversion Kit make this Thunderbike masterpiece not only stunning but perfectly tuned for the road.

Parts & Details

• Thunderbike Grand Prix rear wheel 9.0×21
• Thunderbike Grand Prix front wheel 4.0×23
• Metzeler Cruisetec Rear Tire 260/35VR21 83V
• Metzeler ME888F Front Tire 130/60B23 M/C TL 65H
• Thunderbike Brake Disc Streetmaster
• Thunderbike Pulley Grand Prix Single Side
• Thunderbike Stummellenker-Set ′′GP 2.0′′
• Thunderbike Single-Side Swingarm Kit 21′′ Alu
• Brembo Radial Monoblock M4 Caliper Set black
• Thunderbike Triple Tree Kit Grand Prix 2.0 Performance
• Thunderbike Windshield Kit GP
• Thunderbike Front Fender GP Style
• Thunderbike Hydraulic clutch Conversion Kit black
• Thunderbike Airbox Cover Oval Grand Prix
• Thunderbike Phantom E Grips
• Thunderbike Custom Alu Fuel Tank GP-Style
• Thunderbike Turn Signals Stripe LED with housing
• Thunderbike Forward Control Kit Phantom contrast cut
• Thunderbike Rider Footpeg Set SP-S black
• Thunderbike EFI Cover black wrinkle
• Motogadget Mirror mo.view Race left
• Motogadget Mirror mo.view Race right
• Thunderbike Toppers Base
• Thunderbike Derby Cover Drilled contrast cut
• Thunderbike Timer Cover Drilled
• Thunderbike Axle Cover Swingarm right
• Thunderbike Axle Cover Swingarm left

La entrada Harley-Davidson Softail Breakout ‘GP-Suzuka’ by Thunderbike aparece primero en DARK KUSTOM.

We would like to introduce you to a very special duo: the Porsche 911 GT3 RS with the Weissach Package, and the custom Harley-Davidson Softail Breakout built to match it: the Thunderbike GP-Weissach.

Together with our customer Stefan, we created a project that bridges the gap between high-performance automotive engineering and handcrafted custom motorcycle design. This is not our first collaboration with him. Nearly ten years ago, Stefan inspired one of our most iconic builds, the Lamborghini Aventador–themed Thunderbike OUTERLIMIT. Now, the story continues with a new interpretation of power, precision and style.

The inspiration for the GP-Weissach project comes directly from Stefan’s Porsche 911 GT3 RS (992.1), a machine that represents the ultimate track-focused driving experience. Its 4.0-liter naturally aspirated engine delivers 525 hp, accelerating the 1450 kg car from 0 to 100 km/h in just 3.2 seconds. The Weissach Package further enhances performance by reducing weight by around 15 kilograms through targeted lightweight construction.

Visible high-gloss carbon components such as the front hood, roof, exterior mirrors and wing elements emphasize the motorsport character. Inside, the combination of Race-Tex upholstery, red contrast stitching, magnesium shift paddles and carbon fiber surfaces reflects a pure racing atmosphere. Even the magnesium wheels finished in Pyrored inspired the key color accents of our motorcycle.

For the bike, we selected the Harley-Davidson Breakout FXBRS with Milwaukee-Eight engine as the foundation. This model offers the ideal frame geometry to integrate our GP rear conversion and the substantial 9×21-inch rear wheel. The cockpit retains the original digital speedometer but is now seamlessly integrated into a custom-milled triple clamp. The goal was not to copy the Porsche, but to interpret its attitude. Colors, proportions, finishes and materials were chosen to translate the GT3 RS design language into a new aesthetic expression on two wheels.

The GP-Weissach incorporates the latest developments from our high-end GP component line. It features aerodynamically optimized triple clamps, redesigned handlebar mounts with Rebuffini RR90 controls, and a new GP front mask, all contributing to a dynamic and athletic stance. The open primary drive adds mechanical transparency and highlights the powertrain.

The single-sided swingarm, milled from a solid block of aluminum, allows an unobstructed view of the wheel. An air suspension system at the front and a hydraulically adjustable rear setup lower the bike when parked, giving it a dramatic, grounded presence.

A defining aspect of the design is the use of Pyrored accents, directly referencing the Porsche’s wheel color. The wheels of the GP-Weissach are milled from a single piece, then selectively machined after anodizing to create depth, sharp edges and visual motion. Their five-spoke Y-design appears lightweight and technical, perfectly matching the sporty and high-end character of the build. The exposed 21-inch rear wheel, combined with the perimeter brake system, serves as both a functional and visual centerpiece that underscores the precision and craftsmanship of the motorcycle.

At the end of the project, Stefan summed up his feelings in one sentence: “My goal was 100%. You delivered 110%.” For us, that is the greatest recognition. The GP-Weissach is more than a custom motorcycle. It is the translation of supercar performance philosophy into hand-built motorcycle culture. A Porsche created for the racetrack, and a Harley reinvented to share its spirit. Two machines, one shared heartbeat of motorsport passion.

La entrada Harley GP-Weissach: Born from the Porsche GT3 RS aparece primero en DARK KUSTOM.

This Harley-Davidson Breakout stands as Darkside’s most aggressive creation to date.

After months in the Darkside Dungeon, this beast now features:

• A massive 300mm rear end with a drive-side brake setup
• A 26-inch front wheel with dual 13-inch brakes
• Rake kit with a fat front end to complement the twin brake system
• A full-house forged engine: from Darkhorse crankshaft to 128ci pistons, matched with @ramsheadservicesales ported heads—all built to Darkside spec, delivering over 235hp on 98-octane with a soft tune and low boost
• Turbo system by @lawrence.metal.fab, paired with a custom Darkside billet intercooler
• Custom rear fender and seat pans
• Finished in a deep, menacing all-black coat

At Darkside, the goal has always been to build real street bikes—machines that perform just as well as they turn heads. What truly sets this Breakout apart is the detail behind every component, making it unmistakably a product of the Darkside difference.

La entrada The Baddest Breakout Yet – Darkside Custom aparece primero en DARK KUSTOM.

Introducing the radical edition of Bündnerbike’s latest custom masterpiece — the “Bronx Brute.”

A bike reimagined from the ground up, reengineered with precision, and shaped with bold character in every curve.

Based on the Harley-Davidson Breakout, the original frame has been stretched, lowered, and widened to a whole new level through meticulous custom racking. What remains untouched is the powerful heartbeat of the 117ci Milwaukee-Eight V-Twin engine — everything else has been completely transformed.

The “Bronx Brute” stuns with its deep black and bronze chrome effect finish, paired with one-off custom wheels, a fully redesigned front fork, and hand-shaped bodywork. It’s a street-ready cruiser that carries the soul of a showbike — aggressive, legal in Switzerland, and unapologetically one of a kind.

Designed in the mountains, made for the city — the Bronx Brute brings raw power, refined craftsmanship, and unmistakable presence to the streets.

Technical Specifications

Radical Elegance – Handcrafted with Precision

Stretched Frame
Painstakingly extended and lowered at the rear to achieve a longer, deeper, and more aggressive silhouette.

Completely Custom Bodywork
Every body panel is a one-off creation. No stock parts remain – each component is tailor-made.

Custom Fuel Tank with Side Mesh Inserts
A handcrafted tank featuring integrated mesh elements on the sides, adding visual depth and technical sophistication.

3D Rear Fender with Integrated Seat
A uniquely sculpted 3D fender that seamlessly incorporates the saddle – merging comfort and aesthetics at the highest level.

Integrated LED Turn Signals and Taillight
Elegantly embedded in the rear section – nearly invisible, fully functional, and 100% road-legal in Switzerland.

3D Accents on the Rear Section
High-quality 3D applications refine the transition from fender to frame – crafted with precise attention to detail.

Custom 3D Electronics Housing
All electronic components are neatly housed in a clean, functional, and visually refined 3D box – designed for performance and style.

Performance & Precision Engineering

Chassis

• Rebuffini Upside-Down Forks – Delivering maximum stability and razor-sharp steering.
• Rebuffini Triple Trees – Engineered to fit Rebuffini 4-piston brake calipers.
• Custom Swingarm – With dedicated mounts for pulley and rear brake system.
• Adjustable Bündnerbike Air Suspension – Rear suspension adjustable in height and stiffness.
• Streamlined Belt Cover – Cleanly mounted to the swingarm for a sleek finish.

Braking System

• Front: Rebuffini 4-piston calipers with 320 mm Galfer stainless steel brake discs
• Rear: Brembo 4-piston caliper with 300 mm Galfer stainless steel disc

Wheels & Tires

• Custom Bündnerbike Wheels
  • Front: 18 x 3.5 inches with Metzeler 140/70 x 18 B
  • Rear: 18 x 10.5 inches with Metzeler 300/35 VR 18

Controls & Accessories

• Drag Bar Handlebar with integrated Rebuffini speedometer mount
• Bündnerbike Grips and Rebuffini Radial Controls for clutch and brakes
• Custom Foot Controls for gear shifting and rear brake
• Bündnerbike Performance Air Filter
• Bündnerbike License Plate Holder

Seat

• Bündnerbike Leather Saddle featuring premium diamond stitching – a unique blend of form and comfort

Sound – Legal and Emotional

• KessTech 2-in-1 Exhaust System with electronic valve control
• Deep, powerful sound at the push of a button – fully certified for road use in Switzerland.
• A commanding presence in sound, while remaining completely legal for everyday riding.

Painted? No – Staged.

What glimmers isn’t just paint – it’s a symphony of metal and light.
To achieve the dramatic chrome effect, the entire motorcycle was meticulously silver-plated by hand, layer by layer.

The Result: A rich, shimmering bronze-black tone that shifts from smoky dark to molten metal depending on the light.
Technically complex. Visually unforgettable.
This finish isn’t just a color – it’s a statement.

Crafted with Precision. Approved with Pride.

This isn’t just another custom motorcycle – it’s the outcome of vision, passion, and expert craftsmanship.

Concept and Build: Bündnerbike Manufaktur, in close collaboration with Carrosserie Ludwig – two Swiss names synonymous with quality and radical individuality.

Based on the latest Harley-Davidson Breakout, every inch of the Bronx Brute has been reimagined and elevated into a new dimension. Every detail is intentional. Every line, a testament to true custom building.

And best of all:

This bike is 100% street legal in Switzerland.
No compromises. No shortcuts. Pure uniqueness, built to ride.

La entrada Harley-Davidson Cruiser by Bündnerbike: BRONX BRUTE aparece primero en DARK KUSTOM.

Cult-Werk has taken the Harley-Davidson Breakout to the next level with an aggressive and race-inspired custom build that blends power, performance, and stunning design.

This masterpiece, featuring a Ferrari-inspired special airbrush paint job, stands out with its sleek lines, aerodynamic enhancements, and top-tier craftsmanship.

Key Customizations & Features:

Aerodynamic Design: The Short Front Fender “Custom” V2, Radiator Cowling “Racing”, and Side Cover Set “Racing”—all painted to match—give the bike a streamlined and aggressive look.

Premium Detailing: A Brake Fluid Reservoir Cover “Custom”, Rear Axle Cover with Logo, Timer Cover Milled with Logo, and Dash Cover add exclusive custom touches.

Enhanced Comfort & Performance: The Racing Footrest Set, Short Risers in Black, and Fork Cover Kit in Black refine both aesthetics and ergonomics.

Advanced Lighting: The build features LED Technology Indicators in the front, integrated indicators and rear light in the fender, and a Side License Plate Holder with LED Lighting, all in black for a stealthy finish.

Wider, Meaner Stance: A Wide Tire Conversion to a 260 Rear Tire combined with custom-painted rims adds to the aggressive stance, complemented by an Air-Ride System on the Rear Axle for adjustable ride height.

Ultimate Sound & Performance: The KESSTECH 2-in-2 Stainless Steel Exhaust System with Electronically Adjustable Flap ensures the perfect balance between roaring power and road legality.

Every detail, from the Headlight Mask “V-Rod Style” to the Short Belt Guard in Black, contributes to this bike’s unique and high-performance character.

This Harley-Davidson Breakout is not just a custom bike; it’s a statement of power, style, and precision engineering. Thanks to Cult-Werk’s expertise, it merges the soul of a Harley with the racing spirit of Ferrari.

Custom Parts & Modifications List

• Short Front Fender “Custom” V2 (Cult-Werk)
• Brake Fluid Reservoir Cover “Custom” (Cult-Werk)
• Rear Axle Cover in Black incl. Logo (Cult-Werk)
• Radiator Cowling “Racing” Painted to Match (Cult-Werk)
• Side Cover Set “Racing” Painted to Match (Cult-Werk)
• Mirror Set “Ferrera” (Cult-Werk)
• Fork Cover Kit in Black (Cult-Werk)
• Headlight Mask “V-Rod Style” Painted to Fit (Cult-Werk)
• Short Risers in Black (Cult-Werk)
• Dash Cover Painted to Fit (Cult-Werk)
• Tank Painted to Fit (Cult-Werk)
• “Racing” Footrest Set (Cult-Werk)
• Timer Cover Milled with Logo (Cult-Werk)
• LED Technology Indicators Front Black incl. Cult-Werk Indicator Holder (Cult-Werk)
• Side License Plate Holder with LED License Plate Light in Black (Cult-Werk)
• Rear Conversion “Racing” 2-Seater Variant Painted to Match (Cult-Werk)
• LED Technology Indicators and Rear Light Integrated in Rear Fender (Cult-Werk)
• Wide Tire Conversion to 260 Rear Tire
• Short Belt Guard in Black (Cult-Werk)
• Rims Painted to Match (Cult-Werk)
• Air-Ride System on the Rear Axle for Stepless Height Adjustment
• KESSTECH Complete System 2-in-2 Stainless Steel with Electronically Adjustable Flap (Always Legal!)
• SPECIAL PAINTING “Ferrari” (All Airbrush!!!)

La entrada Harley-Davidson Breakout by Cult-Werk – A Ferrari-Inspired aparece primero en DARK KUSTOM.

DD Design, a renowned custom motorcycle builder from the United States, has once again pushed the boundaries of creativity and engineering with this outstanding Harley-Davidson Breakout custom build.

Wrapped in an aggressive matte black finish, this machine is the perfect embodiment of power, style, and cutting-edge craftsmanship.

This custom Breakout features an all-black, murdered-out aesthetic that enhances its menacing presence. The extended forks, coupled with an ultra-wide rear tire, provide a low-slung, muscular stance that commands attention. High-performance upgrades include an aftermarket air intake, a reworked exhaust system with twin black pipes, and a refined suspension setup that ensures superior handling.

The wheels are a statement of their own, with intricate blacked-out spoke designs that complement the stealthy look of the bike. The front brake system boasts a large, high-performance rotor for increased stopping power, a crucial feature for a beast of this caliber.

DD Design has masterfully blended performance and aesthetics, making this Breakout not just a motorcycle, but a true work of art. This is the kind of machine that turns heads on the streets and dominates any custom motorcycle show.

For those who crave an aggressive, high-performance custom Harley-Davidson, DD Design’s Breakout is a prime example of what’s possible when expert craftsmanship meets bold vision.

La entrada Wraith: DD Design’s Ultimate Breakout Custom aparece primero en DARK KUSTOM.

The Harley-Davidson Breakout “Altre Edition” by BOX39 is a true work of art in the world of custom motorcycles.

Crafted in the United Arab Emirates, this exclusive build combines bold aesthetics with high-performance engineering, creating a ride that commands attention.

BOX39 has transformed the iconic Breakout into a futuristic powerhouse, featuring an aggressive stance, custom bodywork, and a sleek, matte finish that exudes power and sophistication. The massive rear wheel, paired with intricate spoke rims, enhances its striking presence, while the dual exhaust system adds to its raw appeal.

Attention to detail is evident in every aspect of this build. From the seamless integration of the aerodynamic body panels to the refined seat design, the “Altre Edition” pushes the boundaries of what a custom Harley-Davidson can be.

The blacked-out components and gold accents further emphasize its premium craftsmanship, making it a standout piece for motorcycle enthusiasts who appreciate exclusivity and performance.

The Harley-Davidson Breakout “Altre Edition” by BOX39 is not just a motorcycle—it is a statement. It represents innovation, artistry, and the relentless pursuit of perfection in the world of custom builds.

La entrada Breakout ‘Giotto Altre edition’ by BOX39 aparece primero en DARK KUSTOM.

The Harley-Davidson Softail Breakout is already a motorcycle with a dominant presence and a muscular stance.

However, at LDK, they take this base and elevate it to another level, blending power and style into a completely reimagined design.

At first glance, the Stormtrooper commands respect. Its minimalist black-and-white aesthetic creates a striking visual impact, reminiscent of the legendary Imperial soldiers that inspired its name.

But this bike is not just about looks—every detail has been meticulously crafted to achieve a perfect balance between design, comfort, and performance.

• Custom fuel tank, redesigned with cleaner and more aggressive lines.
• Shortened rear fender, giving it a sleeker and sportier look.
• Handcrafted solo seat, upholstered in black with custom stitching.
• Lowered suspension, enhancing its low-profile stance and aggressive posture.
• High-performance custom exhaust, delivering a deep, throaty sound.
• Large-diameter wheels, fitted with wide-profile tires for a more muscular aesthetic.
• Minimalist LED lighting, featured in both the headlamp and taillight.

La entrada Harley-Davidson Softail Breakout – Stormtrooper Edition aparece primero en DARK KUSTOM.