Rev Falcon: Twin-Cam Harley-Davidson Breakout Bobber

Fangster’s Drag-Style Twin-Cam Breakout Bobber…  

In 2012, Harley-Davidson CVO (Custom Vehicle Operations) division launched the original Softail Breakout. 

“Pictures do not convey the beauty of this new model. Harley’s CVO group prides itself on creating ‘artistry you want to ride,’ and the Breakout embodies this philosophy.” –Motorcycle.com

In 2016, the Breakout (FXSB) returned after a one-year hiatus, powered by a Screamin’ Eagle Twin Cam 110B V-Twin with 112 pound-feet of torque at just 3500 rpm. The power met the pavement via an “Assist & Slip” (A&S) clutch and beefy 240-section rear tire. Harley designers had looked to 1950s and 60s drag bikes to inspire the Breakout’s low, aggressive profile.

“The Breakout is exactly how a cruiser should look: at almost 2.5 metres long and just 66cm high it’s long low and menacing.” –Visordown

Now remember our buddy Rui-Ming Chiu, whose Suzuki 125 “Manta” we recently featured? Well, besides running his own design studio, Chiu is a full-time designer for Fangster — a Taiwanese custom parts manufacturer, OEM collaborator, and bike builder whose customs we’ve showcased over the years. 

Fangster Tracker: Harley Sportster 1200

Recently, Fangster teamed up with their new partner Motorcycle Storehouse to take the Breakout’s long and low drag-style design to the next level. The result is the “Rev Falcon” you see here, based on a 2016 Softail Breakout. 

“This partnership is a big deal for us because they’ll be distributing our parts soon, helping us bring Fangster’s designs to a much wider audience. We also entered it into the 2025 Speed & Crafts show and took home second place in the Harley-Davidson class!” -Chiu

Chiu, who served as designer on the build, gives us the full story of the bike’s development below. The design and details are nothing short of staggering, from the custom bodywork to the carbon-wrapped aero bars to the rear pulley-brake and inboard front rotor…the list goes on. Then there’s the bird wing-inspired paint, which is infused with rare metallic Aogai foil. 

As we’ve seen in the past, the strength of Taiwan’s close-knit customs community shines through, as various masters put their special touch on the bike. Fangster handled the design, JZo Crafts the bodywork and exhaust, Simon Fiber Craft the carbon, ChiRui Leather Custom the upholstery, Jeffrey’s Finishing Touch the paint, and Triroad Moto Co. the final assembly. 

This is one new-school bobber we’d love to ride, and we continue to be impressed at the range, vision, and execution of this island nation’s custom builders. Below, Chiu gives us the full story on the build along with a comprehensive build sheet. We look forward to seeing more from this young designer and the community around him.

The Rev Falcon: In the Designer’s Words…

Our design philosophy was to think about what possibilities design could bring to the Breakout without changing the original OEM package. We believe that design should strengthen the Breakout’s silhouette as much as possible, rather than completely reinventing it. So we stripped the bike down to the basics and thought about which characteristics we could extract, and what style would best suit the Breakout. We focused the design on the Breakout’s long rake and trail, wide rear tire, streamlined Softail frame, and lower, longer rider triangle. These features make the Breakout very suitable for developing into a drag-style machine.

In the exterior design of the fuel tank, tail cowl, headlight shroud, and fork covers, we extracted and translated the structural lines of the engine, forks, frame, and headlight as part of the styling language. Through clever surface design, we created main feature lines that shape a visual tension full of speed.

We intentionally had the tail cowl (rear fender) cover part of the swingarm to simulate a common modification technique used on hardtail frames — treating the frame as a whole and extending the paint onto the frame to visually highlight its lines — amplifying the Softail lines. However, because the Softail swingarm is movable, the tail cowl cannot ideally cover the swingarm in all scenarios. Therefore, we installed a Legend air suspension to control the swingarm height and achieve our vision.

To simplify the visuals, we also integrated the Fastline LED light from MCS into the exterior part design. We created a one-off mount so that the lighting — which usually feels like a protruding presence — shares the same language as the surrounding parts, blending them together perfectly.

I think the exhaust was one of the most difficult parts to design for this bike. We don’t like the massive exhausts or those with flashy curves often seen on Breakout builds. We wanted it to blend into the bike subtly, acting as a supporting element with a visual guiding effect. So we shortened its length as much as possible to reduce its mass, and used a CNC slash-cut tip to match the surrounding lines.

The tail cowl is paired with an Alcantara seat. The stitching design follows the lines of the fuel tank, using three-color stitching that matches the paintwork. We tried to make a change to the common diamond-stitch pattern by intentionally placing it only on the front half of the seat, leaving an empty area to engrave the Fangster logo, creating a differentiation from common embroidery or patches.

The inspiration for the aerodynamic handlebars came from road bicycles. We believe that since the rest of the design language strongly expresses a sense of speed, the bars also need to have that same feeling. We have plans to mass-produce it in full carbon fiber, but currently the bike is fitted with a prototype. We re-bent a narrower one-off stainless-steel handlebar, used 3D-printing technology to add the aerodynamic shape, and finally wrapped it in carbon fiber cloth to give it the same visual effect as a bicycle aero bar.

We installed a Koso D2 speedometer on the Twin Cam model. It has the same appearance as the M8 speedometer and can also be integrated into the riser, simplifying the visuals while paying tribute to new technology.

We did not change the original tire configuration; we even kept the original wheels. However, to simplify the rear wheel visuals, improve overall styling consistency, and highlight the rear tire width, we used 3D scanning and reverse engineering.

We designed a pulley-brake mechanism with very fine tolerances that can be installed in the extremely narrow space of the original Breakout wheel, paired with an Arlen Ness six-piston caliper and a one-off rotor.

For the front wheel, we used an Arlen Ness eight-piston inboard brake, but we redesigned the rotor carrier to match the spoke count and design of the wheel.

The paint and graphics were conceived based on the concept of bird wings, mixed with a bit of modern tech feel. We used silver leaf dyed with blue candy paint, paired with a greenish-gray base. Why a greenish-gray? If you look closely, a metallic green light shines through the gray. We infused a rare metallic foil — Aogai foil — into the gray to demonstrate our high pursuit of paint craftsmanship.

Build List

Fangster Color Collection Grips
Fangster Color Collection Point Cover
Fangster Color Collection Air Cleaner
Fangster Color Collection Derby Cover
Fangster Color Collection Gas Cap
Fangster Color Collection Footpegs
Fangster Color Collection Shifter Peg
Fangster Color Collection Riser
Fangster Custom Tank
Fangster Custom Rear Fender
Fangster Custom Headlight Cover
Fangster Custom Aero Fork Cover
Fangster Custom Exhaust
Fangster Custom Rear Pulley Brake
Fangster Custom Front Rotor Carrier
Fangster Custom Front Turn Signal Mount
Fangster Custom Rear Turn Signal Mount
Fangster Custom Aero Handlebar
Fangster Custom Alcantara Seat
Legend Suspensions Air ST Softail Suspension Kit
Custom Dynamics Shark Demon LED Headlamp Unit
Motorcycle Storehouse Fastline LED light, Front: Turn Signal / Rear: 3in1 Turn Signal
Cult Werk Side mount license plate bracket
Arlen Ness inboard 8 piston caliper
Arlen Ness inboard rotor
Arlen Ness 6 piston differential bore caliper
Arlen Ness Transmission end cover
Arlen Ness billet horn kit
Arlen Ness reusable billet oil filter kit
Arlen Ness 10 Gauge tappet block cover kit & pushrod cover
Performance Machine Lower leg assembly
Öhlins NIX22 front fork cartridge kit
Rebuffini Breakout 49mm triple tree
Rebuffini RR90 Radial hand controls set
Koso D2 multifunctional speedometer
GMA 84-99 Forward Control (Redesign the mounting bracket to fit on)
Metzeler Cruisetec Front & Rear

Follow the Builders

Design: Fangster (@fangster_official | fangsterparts.com)
Fabrication (Bodywork/Exhaust): Jzo.crafts (@jzo.crafts/)
Assembly: Triroad.moto.co (@triroad.moto.co)
Painter: Jeffrey’s Finishing Touch (@jeff090410)
Carbon Fiber Craft : Simon Fiber Craft(@dragon19840906)
Leather Craft : ChiRui Leather Custom

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