will a 40,41,42 tooth rear sprocket help with 18" tires ? my setup is a 400ex frame stock 05 crf with a pipe and open air box. thanks for the help. oh ya i have a 38 on it now.:)
Groves187
06-10-2012, 01:19 PM
I run 13/41 on my CRF hybrid. Not a stock motor but I would still run 13/41 stock.