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CRF 80 Jetting and gearing suggestions

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I have one of my sons friends CRF 80's over here. He has a Big gun evo pipe, Rev box, twin air filter and opened up air box. What do you guys suggest for a starting point on the jetting? He races this bike and the stock gearing seems to low. What have you guys experienced with these bikes?

Thanks,

Rich

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what kind of racing does he do? if it is a motocross style then id go up a tooth or two in the rear and keep the front the same size....for jetting, you are probably going to have to go up a size or two in the main and pilot...jsut a good point to start out on...good luck with everything!

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then yeah id go up a tooth or two on the rear and do the same for jetting

If the stock gearing is already too low, why would you suggest going lower? If you drop a couple teeth or two and tune the carb for the mods it should pull well.

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