Few motorcycles on the planet have as recognisable a name and silhouette as the legendary Triumph Bonneville. And the Brit bike made it big all around the world. In 1960s California, racing wasn’t just entertainment; it was identity. Half-miles carved into dust bowls, improvised road circuits laid across sun-bleached tarmac, and Triumph twins screaming through it all. When Johnson Motors of Pasadena, the distributor that helped cement Triumph’s foothold in America, asked the factory for a short, confidential batch of racers that looked OEM but carried genuine competition intent, the result was the T120R “Rennsport.” A hybrid. Half showroom. Half starting grid. And Jets Forever just had to deliver their own modern take on one of history’s famous folktales.
Two years ago, the highly talented and incredibly skilled team began the kind of pursuit that feels more like folklore than sourcing. A whisper of one of these rare ’66 machines still existing. A lead that required discretion. A cache that could not be named. Eventually, after a tumultuous voyage back to Blighty, the Rennsport landed in the hands of Jeff Duval and JETS’ technical chief Sean Reynolds, and the real work began.
The frame was restored to concourse standard, but this wasn’t a cosmetic exercise. Beneath the period-correct steel sits numerous invisible improvements, subtle reinforcement, accommodation for upgraded systems, and careful refinements that respect original geometry while quietly elevating rigidity and usability. It still looks exactly like a mid-’60s Bonneville should. It just behaves like one that’s benefited from six decades of hindsight.
At its core sits a rebuilt fast-road T120R motor punched out to 750cc. Reynolds dynamically balanced the crank, rods and pistons, a decision that speaks less about headline horsepower and more about absolute commitment to perfection. The head has been gas-flowed and treated to competition valves, springs and rockers, driven by appropriate lift cams. A pair of Amal Mk2 Concentrics feed the twin with the right mix and look beautiful doing it, with their big velocity stacks. The brief wasn’t brute force. It was optimisation, torque you can use, power you can trust.
Then comes the decision that defines this build: the retrofitting of an Ark Racing electric starter, supplied by Shropshire Classic Motorcycles. For some, a kickstart is a sacred ritual. For riders who actually clock miles, it can also be a barrier. High-compression twins aren’t always forgiving, especially when heat-soaked or stalled at an awkward junction. The electric start doesn’t erase the character; it ensures the character gets exercised. It transforms the Rennsport from an artefact into a machine you’ll happily fire up on a whim, and ride hard.
The same philosophy extends to the braking package. Instead of period drums, Jets specified a full Beringer competition assembly paired with K-Tech 11.5-inch floating discs. The improvement isn’t theoretical, it’s transformative. Where original brakes required anticipation and compromise, this setup delivers feel, consistency and genuine stopping authority. In a bike capable of real pace, modern braking isn’t an indulgence; it inspires the confidence needed to push the old girl hard.
Handling is equally considered. Up front, 35mm adjustable Ceriani competition forks provide classic race aesthetics with meaningful tuneability. At the rear, CR Suspension units bring contemporary damping control without visual disruption. The bike rolls on chromed 21” and 18” alloy wire rims with stainless spokes by Apollo Wheels of Los Angeles, a subtle nod to its Californian DNA. KOSO instruments, expertly integrated into a carefully reworked electrical system, keep the machine road legal without diluting its era-correct cockpit.
Finished in flawless and faithfully replicated OEM colours by Image Custom Design in Camberley, the Rennsport looks every bit the confidential hybrid Johnson Motors once requested: drop dead gorgeous! But this isn’t nostalgia trapped in amber. It starts at the push of a button, stops with conviction, and delivers power that’s been engineered for real-world riding. Jets Forever hasn’t simply restored a rare 1966 Triumph; they’ve completed its evolution. And it sure is some kind of monster.
[ JETS Forever ]