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2007 XR650R/California model and idle mixture screw!

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Apparently all the 2007 Model XR650R's are the same, so they all had california emmisions....well i removed all the smog crap but there is one small problem.

The idle mixture screw is almost impossible to turn, because its just a flat circle....i think they made it that way so poeple couldnt **** with it. Ive tried sticking a tiny screw driver in there to adjust it, but i marked up the copper pritty bad.

I recently did a side panel venting job and i wanta adjust the jetting and mixture....

thoughts?:prof: ?

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