Re: rear sprocket size
Blue worked it out as 127 revs per tooth & I reckon one more tooth on the front reduces my revs by 500 in top.
So say your top speed now is 135 at 11,000 revs 3 Teeth up on the back would be 125 at 11000 revs (but maybe the engine will have enough power to rev higher as you are going at a slower speed?)
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