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The effect of engine spin direction on the dynamics of powered two wheelers
Published in Vehicle System Dynamics, 2018
Matteo Massaro, Edoardo Marconi
Some race motorcycles are equipped with the so-called counter-rotating engine, where counter-rotating refers to the spin direction of the engine crankshaft with respect to the spin direction of wheels. Indeed, the ‘conventional’ configuration for transverse engine motorcycles is with the engine crankshaft spinning in the same direction of wheels. This standard configuration is usually chosen for simplicity of constructions. In a basic configuration the crankshaft (spin rate ) engages with the gearbox primary shaft (spin rate ), which in turn engages with the gearbox secondary shaft (spin rate
), where the chain sprocket is also mounted [1]. The rear wheel (spin rate ) clearly rotates in the same direction of the chain sprocket due to the chain transmission.