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Message: [QUOTE="jsantapau, post: 1360529, member: 99193"] [url]http://www.yamaha-motor.com/sport/parts/home.aspx[/url] If this is the same carb that he has on the bike part #27 is the power jet and part #30 is an electric solenoid that opens up the passage way for the powerjet which is rpm controlled "Ok now should I change in like I do with the main and pilot to lean the bike out or hardly mess with it" well you have the area it affects thanks to Mathd and there is an assortment of jets so it is tuneable,but having never owned one,jetted one or even cleaned one, I can't answer your question with any knowledge or experience to back it up [/QUOTE]