Yoshi400ex
01-20-2003, 05:46 PM
what size jet should i use on my 400ex because the guy i bought it on put a yoshi slip-on, on it and he had the dealer ship put in the biggest jet for some reason.. because he has such a big jet he had to run it with the airbox cover off to compinsate for the fuel to air ratio.. the problem is i wanna ride with the airbox on which mean i will have to re-jet it but im not sure what size to use...please help??