Originally Posted by Jinksy
If I change my gear ratio from 14/40 to 13/43 will I get better performance off the line? Do I need to adjust the chain length?
I suspect you'll get the answer you need from the CRF250L Owner thread....started in September '12 and up to 186 pages already...
I did a quick web search for the CRF250L and came up with this page of information including gearing...