Join Date: 09-20-2004
Location: Queensland, Australia
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Re: Revs with 15T sprocket on a 929
If you have to change the rear sprocket, and you do a few track days or have mates on the latest litre bikes that you want to keep honest, I'd encourage you to rethink the 520 decision.
On the track, moving to a 520 set-up (-1 on the front sprocket) made a real difference to my straight line speed.
The basic fact is that the change saves nearly 1Kg (I think its about 700 - 750grams) in weight and cuts rolling resistance - the 520 being easier to turn than the heavier 530 chain.
It's not an essential mod for the road, but it's one that is relatively cheap, easy to do, and has a positive impact on your bike's performance.