the Triumph TR5MX. Triumph TR5T Trophy Trail/Adventurer In an attempt to make new models from existing BSA/Triumph parts, a Triumph T100C engine was fitted into modified B50 cycle parts. Launched in late 1972 (1973 model year), the new model was called the Triumph Adventurer in the UK and the Trophy Trail in the US, where most of the machines were sold on the East Coast. The model used Lucas electrics, Nippon Denso Speedo and rev counter and handlebar switches from Yamaha. Production continued into 1974, after which the model was dropped. A British team finished second in the 1973 IDST on these machines. Norton P92 As part of an attempt to produce new models from existing parts, NVT produced a few prototype P92 models. This model comprised a B50 engine in a BSA Fury/Triumph Bandit frame using Isolastic mountings from the Norton Commando. The US DOT had mandated that all motorcycles sold in the US should have a left hand gear change. The B50 had the gear lever on the right, so to comply with this requirement, the engine was tilted forward in the frame and a gear linkage run under the gearbox to provide a left hand gear change. The model never progressed to production. B100 V-Twin (with two B50 cylinders ) Specialist motorcycle designer Gerald Fitzpatrick created a 1000 cc BSA V-twin using parts from two B50 engines in 1977. The frame was a slimline featherbed Norton Atlas. Triumph considered putting the B100 into production but were not able to finance re-tooling costs. The B100 prototype was ridden for two years and has been stored since but was featured in the magazine British Bike Mechanics in April 1978 and January 1988. References External links BSA B50 web site B50 Motorcycles introduced in 1971 Single-cylinder motorcycles