Not much really, but every little helps even if its just a kilo off the weight of the bike. Plus doing away with the weight of the magnets in the flywheel should in theory help the motor spin up a little faster. Worked ok on the rgv.

Plus its one less thing to go wrong, I've had 2 charging problems this year and I know its hassle plugging the optimate in everytime I'm stopped but at least the battery will be charged!

Gets rid of a bit more clutter too..
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More **** two strokes than you can shake a **** stick at.