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04crf450 with BIG GUN slip on

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I have a bog right off idle with my 450 and always have had it even before I put the pipe on (but believe the pipe has made it worse). The BIG GUN website says to replace the main jet with a 170. What is the stock main jet off hand? At work and can not refer to manual. If I choose to richen it up even more would I be backing out the fuel screw out to make it richer? Thanks for the help

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it should be a 165 main we just changed the main in my firends to a 170 on his 04 crf and his was a 165

when you get it going goodlet me know how you like the pipe

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Backing out the fuel screw makes the idle mixture richer. Keep the idle slightly high and make sure the bike is hot when adjusting. Ride to test the response, not on a stand.

Your next option would be to try a richer or leaner needle clip position and re-adjusting the idle mixture.

James

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