I fitted a lightweight flywheel to my 998R.
I also fitted a slipper clutch at the same time.
It has made the engine a bit quicker to rev but the downside is that you have to rev the bike a lot more when pulling away from junctions.
You have to almost ride the bike like a two stroke.
The other point i would like to state is that you will get more engine braking not less.
The standard heavy flywheel wants to keep turning the engine,when you have the lightweight flywheel there is not a lot of weight to keep the motor turning,the engine slows down a lot quicker.
If you are going to fit a lightened flywheel i would suggest fitting a slipper clutch at the same time.
If you don't have one already.
I got a Bucci flywheel from John Hackett for £90.
[Edited on 19-5-2003 by sps955]