Quote:
Originally Posted by Ud_luz
I would think if it's correctly balanced the additional weight shouldn't be an issue.
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Same rider who adds 23 ounces of flywheel weight to the bike isn't gonna be a guy that keeps it spooled up all day.Its a riding style modification.Some relief their to the added stresses to the original engine design.
If I was contemplating that mod,I would cross reference main bearings and rod bearing sizes between a trials bike engine with approximate cc as what I was modifying.
Factor in the trials bike is much lighter.And is designed to run at a lower rpm with an intake,exhaust and electrical system designed for smooth almost electric acceleration and decceleration.There is no hit and the engine will only rev so high.
There is a cutoff somewhere to how much weight you can add and still expect the lower end to hold up.