If you want more acceleration, especially in lower gears, lightening crankshafts and flywheels is a good idea.
It may also result in a slightly lumpier idle, but will give faster throttle response when you blip the pedal! Much like a motorcycle, because they have no flywheels. The gains are quite small and expensive but like all engine tuning you have to decide what you are trying to achieve. And everything should be a good balance of modifications that matches. A lightened Suzuki 1300 GSXR Crankshaft and it has no flywheel at all! >>>
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