The Yamaha R1’s ultra-short-stroke engine has a cross-plane crankshaft, with its crank pins set at 90° and has irregular firing intervals, which is technology lifted directly from Valentino Rossi’s factory YZR-M1. Related: 2020-on Yamaha R1 review At a standstill the motor spins up ...
The most unique aspect would be the technology for controlling the torque from the four-stroke engine. By finetuning the angle of the crankpins, inertia torque generated by piston movement can be reduced and torque produced would be better. YZR-M1 that competes at MotoGP, the pinnacle of ...
Yamaha's RZ500 (also known as the RD500LC) was a two-stroke rocket that was kept out of America thanks to EPA regulations. Only built between '84 and '86, it's now a desirable collector's bike - and this one's already been titled in the US. This was sold