This customized Harley-Davidson Softail Fat Boy takes the iconic silhouette of the Fat Boy and transforms it into a radical big-wheel muscle cruiser.

Built with an extensive catalog of Thunderbike parts, it combines bold stance, premium craftsmanship and modern performance upgrades that completely change the character of the motorcycle while keeping its unmistakable Harley DNA.

The transformation is immediately visible thanks to the Thunderbike Big Speed wheels. The setup features a 23-inch front wheel paired with a 21-inch single-sided rear wheel, wrapped in Metzeler Cruisetec 260/35VR21 and Metzeler ME888 130/60B23 tires. The Thunderbike single-side swingarm kit not only exposes the wheel visually, but also gives the Fat Boy a clean, show-bike rear profile. Braking performance is enhanced with a Thunderbike Big Speed 340 mm brake disc, pulley, heavy-duty 1-inch belt, and caliper adapter.

The bike sits lower and more aggressive thanks to a Thunderbike fork lowering kit and Air Ride suspension system. This allows the rider to switch between slammed show-stance and comfortable riding height at the press of a button. Custom steel fenders — a 23-inch front fender and 260 mm rear fender — perfectly contour the oversized wheels and tires, creating a seamless flowing line from front to back.

The cockpit and riding position were upgraded with the Thunderbike Hollywood Light handlebar mounted on an Old Style riser kit, along with Motogadget mo.view Club mirrors. Thunderbike grips, LED stripe turn signals with load equalizer, and multiple axle and swingarm covers complete the detailed finishing touches.

Visual highlights continue across the bodywork with the Thunderbike chin fairing GP Style Long, oval Torque airbox cover, derby and timer covers, ignition coil relocation kit, and tank-to-seat cover. A custom Thunderbike seat base and foam finish off the rear section, giving the Fat Boy a sleek profile while maintaining comfort.

Every element of this build works together to create a high-impact custom Softail Fat Boy that blends big-wheel style, premium Thunderbike engineering, and modern performance parts. The result is a motorcycle built to turn heads whether parked at a show or rolling down the highway — a statement piece in the world of Harley-Davidson custom bikes.

Fat Boy parts

• Thunderbike Big Speed wheel
• Thunderbike Big Speed wheel
• Metzeler Cruisetec Rear Tire 260/35VR21 83V
• Metzeler ME888F Front Tire 130/60B23 M/C TL 65H
• Thunderbike Single-Side Swingarm Kit 21′′ Alu
• Thunderbike License Plate Frame Inside Plate
• Thunderbike License Plate Lighting
• Thunderbike Reflector Inside Plate
• Thunderbike Pulley Big Speed Single Side
• Thunderbike Brake Disc Floated Big Speed 340mm
• Thunderbike Brake Caliper Adapter 300->340mm, left black
• Thunderbike Belt 1′′ heavy duty
• Thunderbike Tele Fork Lowering Kit
• Thunderbike Frontfender Stahl 23′′
• Thunderbike Rear Fender Steel 260 mm
• Thunderbike Seat Plate
• Thunderbike Seat Foam for TB Seat Plate
• Thunderbike Cover Tank to Seat, black
• Thunderbike Ignition Coil Relocation Kit black
• Thunderbike Air Ride Suspension Kit
• Thunderbike Chin Fairing GP Style Long
• Thunderbike Riser Kit Old Style with wireholes
• Thunderbike Handlebar Hollywood Light
• Thunderbike Turn Signals Stripe LED with Housing
• Thunderbike Turn Signal Load Equalizer
• Thunderbike Grips Base Satin black cut
• Thunderbike Front Axle Cover-Set
• Thunderbike Axle Cover Swingarm left
• Thunderbike Axle Cover Swingarm right
• Thunderbike Passenger Footpegs Satin Design
• Thunderbike Airbox Cover Oval Torque TB-Logo
• Thunderbike Timer Cover New Custom
• Thunderbike Derby Cover Torque Logo
• Thunderbike Toppers Base
• Thunderbike Brake caliper cover
• Motogadget mo.view Club Mirror black

La entrada Harley-Davidson Fat Boy – Half Hundred by Thunderbike 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 Harley-Davidson Softail Dragster “Silverstone” by Thunderbike is a stunning example of how far custom craftsmanship can go when performance styling meets premium components.

Inspired by racing aesthetics and muscular dragster lines, this Softail build combines aggressive stance, high-end engineering, and a clean silver finish that fully lives up to its Silverstone name. It is not just a customized Harley – it is a statement of style and precision.

Race-inspired design with Grand Prix DNA

The first thing that stands out on the Silverstone Dragster is the Thunderbike GP-Style bodywork. The Front Fender Thunderbike GP-Style and Rear Fender Thunderbike GP-Style 260mm stretch the lines of the bike, emphasizing the massive rear wheel and low-slung silhouette.

The Chin Fairing Thunderbike GP-Style and Fuel Tank Thunderbike Custom GP-Style continue this flowing Grand Prix look, creating a cohesive racing-inspired design from front to back.

To match the sleek body parts, Thunderbike added the Headlamp Cap Thunderbike, enhancing the compact and aggressive front end. The result is a motorcycle with strong track DNA but unmistakable Harley-Davidson character.

Premium controls and cockpit details

Riding position and control components play a big part in the Dragster look. The Silverstone features the Thunderbike Clip-On Grand Prix bicolor handlebar, which places the rider in an aggressive, forward stance.

This is complemented by the Grip Set Thunderbike Base Satin and Toppers Thunderbike Base, adding subtle visual refinement.

For ultimate control, the bike is equipped with Levers Rebuffini hydraulic set with switch, offering precision feel and premium machining quality. Completing the ergonomics setup are the Forward Controls Thunderbike V-Tech, giving the Silverstone the stretched drag-style riding posture.

Custom intake, airbox, and engine accents

Thunderbike continued the Grand Prix theme into the engine area. A Thunderbike Airbox Baseplate works together with the Thunderbike Air Cleaner Airbox Kit and the stylish Airbox Cover Thunderbike Grand Prix. This combination not only enhances performance but also keeps the visual language consistent throughout the build.

The details matter – which is why parts like the Derby Cover Thunderbike Drilled and Ignition Cover Thunderbike New Custom were chosen. These touches reinforce the custom character and highlight the engine as the true heart of the Silverstone Dragster.

Single-sided swingarm and performance braking

One of the most eye-catching elements of the Silverstone build is the Thunderbike Single-Side Swingarm Kit 21”. This conversion exposes the custom rear wheel completely on one side, giving the bike a premium custom-show look while emphasizing the wide rear tire.

Braking performance is handled by a Brembo Radial Monoblock M4 brake caliper. This component comes directly from the high-performance motorcycle world and fits perfectly with the racing-inspired concept of the build.

Suspension, front end, and chassis components

To control power and improve handling, Thunderbike installed the Front End Thunderbike Radial Kit Grand Prix. This works together with the Triple Tree Thunderbike Grand Prix bicolor, providing stiffness, precision steering, and a distinctive visual signature.

The Seat Plate Thunderbike flows neatly into the rear section, completing the dynamic line of the dragster profile. Thunderbike’s design ensures that every component appears intentional and integrated, not simply added on.

Lighting and visual finishing touches

Attention to detail continues with carefully selected lighting elements such as Thunderbike Front Turn Signals and Thunderbike License Plate Lighting, keeping the rear minimalist and clean while remaining street-ready.

The exhaust note plays a major role in the overall experience, and the Thunderbike Exhaust delivers the deep sound and visual presence expected from a custom Harley-Davidson dragster. Custom Thunderbike Wheels complete the look, adding motion even when the bike is standing still.

A complete custom concept

The Harley-Davidson Softail Dragster “Silverstone” by Thunderbike is not just a list of aftermarket parts – it is a coherent concept motorcycle. Every modification supports the central idea: a drag-inspired, Grand Prix-styled Softail that blends elegance with aggression.

La entrada Harley-Davidson Softail Dragster ‘Silverstone’ 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.

BT Choppers strikes again with an extraordinary interpretation of the Harley-Davidson FXST — a build that blends aggressive stance, premium craftsmanship, and refined elegance in every detail.

This custom FXST immediately grabs attention with its low-slung silhouette, oversized rear wheel, and precision-engineered exhaust system. The sculpted lines of the bike flow seamlessly from front to back, enhanced by a deep metallic bronze finish that shifts beautifully under the light. The custom star-pattern wheels, paired with a massive rear tire, reinforce its muscular and dominant character.

Up front, the bike features a modern headlamp setup, straight handlebars, and clean controls that give it a stripped-down, performance-oriented look. The hand-built dual exhaust not only steals the show visually with its symmetrical layout and brushed metal texture — it also boosts the bike’s sound and performance.

A suede-style seat keeps the profile sleek while adding a touch of comfort and luxury. Every component feels intentional: from the custom fenders to the engine detailing and the flawlessly integrated accents.

This FXST by BT Choppers is more than a motorcycle — it’s a rolling piece of craftsmanship designed for those who demand presence, precision, and power in a single machine.

La entrada BT Choppers’ Masterpiece: A Fully Customized Harley FXST 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.

BT Choppers strikes again with a stunning custom build, this time transforming a Harley-Davidson Street Bob into a true masterpiece.

Baptized with the name “Bled”, this bike perfectly combines raw power with refined design.

The Street Bob’s Milwaukee-Eight 114 engine remains at the heart of the project, but almost everything else has been upgraded for a more aggressive stance.

A massive rear wheel, custom exhaust system, lowered stance, and handcrafted details make this build stand out from the crowd.

The sleek black paintwork with subtle red accents highlights the bike’s muscular silhouette, while the wide tires and blacked-out components emphasize its bold character.

This is not just another custom Harley — “Bled” represents the vision and craftsmanship of BT Choppers, pushing the boundaries of what a Street Bob can become.

La entrada Harley-Davidson Street Bob ‘Bled’ by BT Choppers aparece primero en DARK KUSTOM.

Rick’s Motorcycles once again showcases its expertise in the art of customization with this aggressive and refined take on the iconic Harley-Davidson Fat Boy.

This build is all about muscle, presence, and premium components, turning a classic cruiser into a head-turning custom machine.

At first glance, the massive 300 rear tire sets the tone, perfectly integrated with Rick’s Mono Swing Arm and a custom rear fender, engineered to match the wide tire’s brutal stance. Rolling on Rick’s signature forged Mono Block wheels, this Fat Boy commands attention from every angle. The front end features a 23″ wheel, complemented by Rick’s custom front fender, giving the bike a perfectly balanced and aggressive silhouette.

Performance and handling are matched with premium details. Rick’s wave brake discs ensure powerful stopping performance while enhancing the overall aesthetic. The axle cover kit adds a clean, refined finish to the wheels and suspension components.

One of the most striking visual upgrades is Rick’s stretched gas tank, seamlessly integrated into the Fat Boy’s frame for a longer, lower look. Combined with the Custom Chrome Europe handlebar, the rider’s position is both commanding and comfortable.

Lighting and electronics are taken to the next level with ultra-compact yet powerful Kellermann ATTO turn signals, blending minimalism and visibility with German precision.

This Harley-Davidson Fat Boy is more than just a custom bike – it’s a testament to Rick’s Motorcycles’ commitment to craftsmanship, style, and performance. Every component is carefully chosen and flawlessly executed, making this build a true standout in the world of custom Harley-Davidsons.

La entrada Fat Boy by Rick’s Motorcycles – A Bold Statement 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.

Nine Hills, the renowned custom motorcycle workshop, has once again proven its mastery in transforming Harley-Davidson machines into bold, unique works of art.

Their latest creation, a modified Harley-Davidson M8 Fat Boy, carries a name that speaks volumes: Prisoner.

This aggressive build exudes raw power and attitude. Every element of the bike has been carefully reimagined to reflect a dark, muscular aesthetic. From the low-slung stance to the blackout finishes, Prisoner commands attention wherever it goes.

The iconic Milwaukee-Eight 114 engine remains at the heart of the machine, but its presence is amplified by custom detailing and performance enhancements that take it to the next level.

Nine Hills has applied their signature style with precision — the wide rear tire, the minimalist bodywork, the handcrafted exhaust, and the custom seat all contribute to the bike’s outlaw personality. It’s not just a motorcycle; it’s a statement of rebellion and freedom.

Baptized as Prisoner, this Fat Boy breaks all chains of convention. It’s a bike for those who ride against the current — built not to follow, but to lead.

La entrada PRISONER – A Harley-Davidson M8 Fat Boy by Nine Hills aparece primero en DARK KUSTOM.