i have an rcr pipe an k&n filter what jet should i e running for maximum power?

 

Do you have a complete exhaust or just a muffler? If you have just a muffler you would be good with a 160 main jet

 

You should try HPD's airbox mod and jet kit, the air scoop lid will allow alot more air into the engine so you will get the most out of your exhaust system. the jet kit includes a modified needle jet and 170 main jet that works great with the air scoop for maximum output and it's easy to install. You could add just a larger main jet but you could do better with the HPD kit!
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'02 Scrambler-X 500 2x4, DG stage III xcellerator exhaust system,
K&N filter, HPD airbox mod and jet kit (170 main)and steering
stabilizer, heelclicker clutch kit, aaen roller action secondary,
HSP chain tensioner-alu. bar clamp-alu. dashplate and red shift
****, O'neal alu. bars, smith grips, super cooler, radlites, fuel
gauge, rear rack, rear hitch, rear swingarm guard, decals,
shock covers, H/L water temp. gauge. future HC-X and dial a jet.