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1997 XR70 exhaust and intake changes

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I have a 1997 XR70 and am going to change up the exhaust and intake... I put a K&N air filter on and putting on an open sparky cap on the exhaust. Wondering where i should start on the jetting?

What would you run for the pilot and the main? I just need a starting point...

THANKS!!!

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Looks like I'm running a pilot 38 and a main 62. Wondering if I need to change out the pilot as well as the main. Figure a main of 65 - 68 would be good , but not sure if neccessary to up the pilot to a 40. Adding K&N and open sparky cap.

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