Hi and thanks. There is a link earlier in the thread to a site gearingcommander which is very very good. It does all the maths for you, but there's nothing like experiencing the change - if you know what I mean. Can't help thinking if a 15 tooth sprocket was better than standard 16 then Yamaha would have done it. Having said that, my mate (mentioned earlier) is a dinosaur biker/racer/mechanic and reckons for the losses on top speed the bike will be more useable.
So for the cost of a sprocket I will try it (don't know when tho). When I have done it, and road-tested it I will be sure to let you know.
atb
So for the cost of a sprocket I will try it (don't know when tho). When I have done it, and road-tested it I will be sure to let you know.
atb

