Triumph’s new Bonneville is fast becoming a go-to choice for custom-bike builders who want to start with a reliable current machine, rather than scour junkyards for clanky old donors. Triumphs start out cool and can easily be made even cooler. Three cases in point are the latest Triumphs yamaha bike customer care Mule Motorcycles, Richard Pollock’s little speed shop out of suburban San Diego.
Hinckley Bonnevilles are taking up more and more of Pollock’s build time—he currently has six under construction—and he’s just launched a line of aftermarket products for the Brit twin. For cost considerations and ease of registration, all three of the Triumphs keep their stock frames rather than the proprietary unit Pollock uses for one-off coachbuilts. There’s still lots of room for individuality, however. And while the frame is original, that doesn’t mean it hasn’t been tweaked.
As the engine was out of the frame anyway, Pollock sent it to nearby Triumph Performance USA for the shop’s standard 904cc big-bore treatment. Together with cams, headwork, a pair of 39mm Keihin FCR flat-slide carbs and a remapped ignition module, plus a set of Mule 2-into-1 pipes, the result is an entertaining 85 bhp at the rear wheel. Other items from the Mule catalog on display here include Race Tech shocks built to Pollock’s specs, spoked Sun alloy wheel assemblies and 19-inch Goldentyre CC rubber, Italian flat-track tires that are fully DOT-certified. The fiberglass solo tailsection with sculpted saddle by Sargent is another Mule kit. Mule front end—with Pollock-designed billet triple-clamps that plug into the stock headset, and allow fitment of 43mm conventional forks from older Yamaha R6s, a favorite of flat-track racers.