it depends on your rear tire size and weight.............................
going by all the other yamahas raptor banshee blaster i would say its a 40 tooth Yamaha always goes with a 13 tooth front sprocket and a 40 rear
14 in front and 40 in the back
For the '06 - 48 teeth in the rear. 13 in the front. For the '07 - 49 rear. 13 front. Not sure about '05 or '08.
Sprocket size will b 16T & 39
The chain is size 530, and the stock gearing is 15/45, meaning that the front sprocket has 15 teeth and the rear sprocket has 45 teeth.
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 uses a 47 tooth sprocket.
41 tooth
13 theeth...upgrade to 14's niceee
It might fit but it won't work because the jetting will be wrong and with that big of a size difference the throtle will probably have too large of an opening in it.
13 tooth front/ 40 tooth rear