Originally Posted by Drcy

I need some help,

3Racing produces different central pulleys (16/17/18) for the Cyclone.
I bought the kit with this 3 different central pulleys, but :

1st - I only get the original 16T to fit with the Excel Belt???? Does somebody know how (or with which belt) I manage to change from 16T to 18T (does exist another belt for it)?????

2nd - Different pulleys means different ratio, in this case

2.4375 (std Cyclone internal ratio)
39/17 = 2.2941
39/18 = 2.1666

are different ratios related with the Track size??

means smaller track (more technical) requires smaller internal ratio???

thanks for any help in clarifying this

Pedro