Just read this on the Aussie site....
Another mod open to 916 and 748 owners is the removal of the flywheel outer weight. The flywheels on these bikes have an inner hub which is used as part of the starting system, and a bolted outer weight for mass. Removing the outer mass will let the engine respond more rapidly than standard. This mod is probably not suitable for a bike used for tooling around the suburbs or regularly carrying a passenger. On a bike used mainly for sports riding, it is another simple mod that can be easily reversed should you wish.
Anyone tried this???
Jas