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Message: [QUOTE="Matt90GT, post: 1356916, member: 30871"] [url]http://www.motocrossactionmag.com/ME2/dirmod.asp?sid=&nm=&type=news&mod=News&mid=9A02E3B96F2A415ABC72CB5F516B4C10&tier=3&nid=031556959CFA469F9F6F09FC20E9F64C[/url] MXA usually does really good on their jetting. Seems like stock, drop the main and needle down is where they ran the bike. PRetty simple 2 seconds of searching on yahoo to find jetting specs for the bike. Gosh, need someone to hold your hand while jetting the bike??? Also at 40:1 if the bike is jetted 32:1, you are running rich. So either run the 32:1 or fix the jetting. What pilot jet is in the bike? what needle and clip? Get a new plug, run it with a plug chop and post the color. I would start by repacking the muffler though. [/QUOTE]