British Customs Vintage Vendetta

Bike Background

Donor Bike: 2012 Triumph Speedmaster

The Story

The Triumph Speedmaster and America are often overlooked as platforms for customization, but in reality the 270 degree parallel twin boasts a great power band and serves as a solid foundation for a build. The British Customs design team set out to show what can be done with a 2009 Triumph Speedmaster using simple bolt-on products. As with most of British Customs’ bike builds, this process served as an opportunity to develop and test new parts that eventually found their way into the British Customs line of cruiser products.

One of the key design elements of the build was the replacement of the factory gas tank with a tank from a Triumph Thruxton. To mount the new tank we had to trim 1/8” off each side near the mounting bungs and trim the factory mounting ears from the back side of the Thruxton tank.

The factory rear fender was upgraded to a 2012 Triumph Speedmaster fender. Rather than using the factory Speedmaster taillight, however, the design team developed a new billet aluminum taillight that mounts in the factory location and requires no modification or wiring; it’s a complete plug-and-play solution.

With the bodywork in place we set our focus onto the stance of the bike. First up was the seat. We installed the British Customs Low Profile Seat to give the bike a lowered look while improving the riding position.

With the new seat in place we moved onto the wheels. We acquired a set of older Triumph America spoked wheels to replace the cast alloy wheels. The front hub was powder coated in satin black and laced to a 21” front wheel using the BC 21” Spoke and Rim kit, then wrapped in a Metzler ME880 21” front tire. The rear hub and carrier received the same powder coating treatment and was laced to a BC 18x5.5 Wheel and Spoke Kit, and was wrapped in a Metzler ME880 18” rear tire. To improve stopping power we fitted the front with a Braking Front Rotor.

After getting the wheels and tires set up it was time to move on to suspension. We upgraded the rear to Hagon Road Shocks, which helped give the bike a proper stance. The front end was fitted with a Progressive Suspension Lowering Fork Spring Kit. The design team machined off the factory fender mounts and gave the forks a nice satin black powder coat. Next they developed a cosmetic fork spring kit, and swapped the factory headlight for a 7” British Style Headlight mounted with a set of Bonneville Fork Ears.

Wanting to keep a sleek, low profile look, we opted for a swap meet set of take-off handlebars mounted upside down with some BC 1” Four Bolt Risers. To complete the clean and simple look we relocated the ignition switch and applied the BC 1” Switch Eliminator Kit. The factory controls were replaced with a set of Joker Machine J-Tech Brake Controls and Cable Clutch Controls, and the Joker Jx Throttle Housing maintained the low profile look. The handlebars were finished off with a set of Biltwell 1” Kung Fu Grips.

Our design team took the same simple approach when it came to the foot controls. The factory foot controls felt and looked bulky and out of place. British Customs developed a Bates Forward Control Kit for the Speedmaster and replaced the factory reservoir with the BC Cruiser Brake Reservoir Kit. This gave the foot controls the same sleek design that we applied to the hand controls in a tribute to vintage bikes.

Next up was performance. The Vintage Vendetta was fitted with a British Customs Exposed Air Box Elimination Kit which allows for two high flow K&N air filters to be fitted directly to the throttle bodies, and also allows us to remove the factory drilled cosmetic covers. To improve exhaust flow we developed a prototype high mount exhaust wrapped in Thermo Tech Graphite Header Wrap and installed brass end caps for an extra flair. British Customs Stage 1 Street Cams and our Air Injection Removal Kit added a little extra oomph to the parallel twin.

The devil is in the details, and after reviewing the long list of current mods we added the finishing touches to complete the project. We installed the BC Clutch Dress-Up Kit to clean up the look around the clutch bracket and lifter arm. A Joker Machines Shock Dress-Up Kit helped add some style to the shock, seat and headlight mounting hardware. We replaced the alternator and sprocket covers with Speed Merchant Finned Covers. Finally, a BC Drilled Countershaft Sprocket and DID Gold Chain were added to tie the brass bits together, while the body work was painted and pinstriped in a copper and satin black finish by Kelly & Son in Bellflower, CA.

The British Customs “Vintage Vendetta” is now on tour with Triumph Motorcycles North America at the Progressive International Motorcycle Shows. To see the event dates and locations, along with which events BC staff will be attending click here.

Parts List



  • BC Bates Style Controls (In Development)
  • BC Four Bolt Risers
  • BC 1" Switch Eliminator Kit (In Development)
  • BC Clutch Cable Bracket
  • Biltwell Kung Fu Grips
  • Custom Harley-to-Triumph Control Cables
  • Joker Machine Jx Single Cable Throttle Housing
  • Joker Machine J-Tech Brake Controls
  • Joker Machine J-Tech Cable Clutch Controls



  • BC Round Taillight Kit
  • BC Headlight Ears
  • BC 7" Headlight

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