Well i will tell you what i had to do when i got my yoshimura pipe i got a jet kit and it didnt run right for 2 days of tuning i removed the jet kit and got rid of it and i just went to my local dealer and got a bigger main jet ( i got 4 jets starting above the stock and up) they run like a buck each or so but after i put the stock needle back in and tried each of the jets i finally found one that works and it runs great. but i hope you have better luck than i did with that kit.
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