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The best sprocket comb for lc135 is 15 37 which the ratio is 2.47
wht is the best sprocket combination for Yamaha 135 answer: depends on your tire size you use at the back. try the different sprocket gear ratio listed on the yamahat135.com or see the link below
it depends on your rear tire size and weight.............................
Best sprocket combi for rj 110cc - 14 36
tite
15t 43t
14-43
14 - 35
12-35 the best
15-36
longer gearing needs less teeth on rear sprocket ( more mph if you've the excess power)
I run a stock rear sprocket and 15 front. does great for 500 ft drags