Weight Reduction of Engine Parts for Motorcycles

FEM modeling was used to reduce the weight of engine reciprocating parts (pistons and piston pins) in order to reduce engine vibration and aid in the weight reduction of other engine pans. A non-dimensional number using the Mises stress σ_M /σ_0.2 (θ) was used to improve the accuracy of simulation. It was found that changes in piston shape could compensate for increased stress due to reduced piston wall thicknesses, resulting in effective weight reduction for this part.

Reduced engine weight not only improves performance but also lowers fuel consumption. This, combined with less engine vibration, leads to a lighter and more efficient vehicle.