Yes got a price of £34 for a rear one from my local dealer dealer today.
Is that a good price.. they wasn't able to provide a lower tooth front, they mentioned 749 as standard @ 14 tooth, so I guess my best option id to go 2 up on rear (41)
Peak Torque is supposed to be 8.5k revs and peak power at 10k, so I would guess never letting the revs drop below 5k and trying to stay between 6k and 10k revs