Weighted flywheel or clutch weights?

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miks

Race Dog
Joined
Aug 11, 2016
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Bike
KTM 690 Adventure
Howzit guys

I'm busy parts shopping for a project and need some technical assistance. The bike in question is a Yamaha YZ250 - I've purposely posed in this general section as I believe the info will not be limited to this one bike.

There are 2 options available that make the bike easier to ride in technical sections, a weighted (heavier) flywheel replacement or bolt on clutch weights. Both options claim to reduce the bike staling at low speeds because of the extra rotational force.

Which option would be 'safer' for the motor in the log run?
Yamaha sells a heavier flywheel which is popular in the states, and there is a local clutch weight product which bolts onto the clutch pack. My thinking is that the flywheel weight is closer to the centre of the crank, and the extra weight has less leverage on the bearings etc.

 

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