It may be interesting to some that the kit RS125 crank is heavier than the stock one, for the same reason the F3 flywheel got a little heavier as it was developed.

There's not a great deal wrong with the standard crank really, except that it won't of course work with any of the F3 parts! It does need truing up however, and mass production manufacturing tolerances mean it's not always possible to get a stock crank absolutely true, so you ideally need to pick the best of a batch.
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Andy.
NSR-WORLD.COM

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