what style main jet is in the 07 sm610 ? i didnt recieve a manuel with my bike when i bought it new and was wanting to go with a bigger main .also i live in sw virginia what size would work best for me ?thanks
It's most likely a 172 main. Switching to a higher main is probably not going to produce the desired results. The main jet works with the needle to produce the delivery of the fuel curve along with other junx in the carb: ap, air jets, pilot circuit ... .. .
Easiest to buy the JD jet kit. They have excellent support to assist the installation and dialing in.