Yamaha updated its long-running RD350 twin in 1976, lengthening the stroke to create the RD400. The new model had completely revised styling (shared with the equivalent RD250) featuring a coffin-shaped fuel tank, ‘speed block’ graphics (in Europe) and, for the first time on a production roadster, cast alloy wheels. To accommodate the 400’s extra grunt, the crankcase assembly was beefed up and the engine unit mounted on rubber bushes to isolate the rider from high-frequency vibration. Although there was no vast increase in peak power over the RD350, the larger engine had a much better spread of torque and, just like its predecessor, proved highly amenable to tuning. Tweaked RD400s were soon boss of their class in production machine racing the world over. Sold new in Austria and purchased by Professor Ehn in 2002, this RD400 was ridden by him in the Yamaha 50th Anniversary event at the Brno circuit in the Czech Republic in 2005. The machine is offered with Austrian Typenschein.
Yamaha updated its long-running RD350 twin in 1976, lengthening the stroke to create the RD400. The new model had completely revised styling (shared with the equivalent RD250) featuring a coffin-shaped fuel tank, ‘speed block’ graphics (in Europe) and, for the first time on a production roadster, cast alloy wheels. To accommodate the 400’s extra grunt, the crankcase assembly was beefed up and the engine unit mounted on rubber bushes to isolate the rider from high-frequency vibration. Although there was no vast increase in peak power over the RD350, the larger engine had a much better spread of torque and, just like its predecessor, proved highly amenable to tuning. Tweaked RD400s were soon boss of their class in production machine racing the world over. Sold new in Austria and purchased by Professor Ehn in 2002, this RD400 was ridden by him in the Yamaha 50th Anniversary event at the Brno circuit in the Czech Republic in 2005. The machine is offered with Austrian Typenschein.
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
