Description
: Trevor Burgess and the Yamaha 50cc (1967 Isle of Man TT)
At the 1967 Isle of Man Tourist Trophy, the 50cc Ultra-Lightweight TT class was dominated by a fierce battle between the official Suzuki and Honda factory teams, alongside a challenge from European brands such as Derbi and Kreidler. However, among the sea of independent riders tackling the colossal Mountain Course (60 km per lap), British rider Trevor Burgess delivered a historic performance aboard a highly unusual Yamaha 50cc.

While most Japanese manufacturers focused their official resources on the larger displacement classes (125cc and 250cc), 50cc bikes from the brand with the three tuning forks were extremely rare to see in the hands of privateers. Despite this, Burgess relied on the lightness and precision of the Japanese chassis to compete against the world’s best.

Features
- Model: Yamaha 50 GP / Special Client (TT Spec).
- Engine: 49 cc, air-cooled, 2-stroke, single-cylinder with rotary disc intake.
- Transmission: 5- to 8-speed gearbox.
- Power and Performance: ~11.5 CV at 13,000 RPM, reaching a top speed of nearly 140 km/h.
- Chassis and Weight: Very compact multi-tube cradle chassis, weight reduced to just 56 kg.

The Gesta at the 1967 TT
Starting with race number #26, Trevor Burgess completed the demanding laps of the Mountain Course with relentless consistency. Lap after lap, he maintained a steady pace without pushing the small 2-stroke engine to the point of failure—a problem that affected more than half the field that year.

Burgess crossed the finish line in an impressive 9th place overall, the only 50cc Yamaha in the Top 10 and one of the few unofficial Japanese bikes to complete the race. Thanks to this result, he claimed the coveted TT Bronze Replica, cementing his status as one of the most effective privateers of the day.

Credits
Irgam