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Everything Dirt Bike
Make / Model Specific
Yamaha
please help!!!! looked everywhere on the net and cant find anwser!!!!!
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<blockquote data-quote="2smoke" data-source="post: 52122" data-attributes="member: 563"><p>Well since it is a Mikuni a 450 does sound a way to big. Your YZ is only a year newer than my RM, so Im assuming that the carbs are the same Mikuni TM carbs. My bike came stock (brand new from the factory) with a 360 main jet and a 45 pilot. My bike is set up similar to your YZ, FMF fatty, and Turbine core silencer, plus, Boyesen rad valve. I run a 320 main in the winter, 310 early spring, 300 right now, and a 290 for the most part during the summer. One really hot days during the summer I will install a 280 main. I run a 45 pilot in the winter and a 42.5 pilot in the summer. The jet needle is set at the 3rd position in the winter and the second position in the summer. Plus its also the next size larger than stock. My air screw setting will depend on the day. But typically its not more than 2.5 turns out and not less that 1 full turn from fully seated. Ive never messed with my Idle screw. But it does appear to be in all the way but the bike doesnt idle too high when its warmed up. When its cold it does idle kinda high whether I have it choked or not.</p></blockquote><p></p>
[QUOTE="2smoke, post: 52122, member: 563"] Well since it is a Mikuni a 450 does sound a way to big. Your YZ is only a year newer than my RM, so Im assuming that the carbs are the same Mikuni TM carbs. My bike came stock (brand new from the factory) with a 360 main jet and a 45 pilot. My bike is set up similar to your YZ, FMF fatty, and Turbine core silencer, plus, Boyesen rad valve. I run a 320 main in the winter, 310 early spring, 300 right now, and a 290 for the most part during the summer. One really hot days during the summer I will install a 280 main. I run a 45 pilot in the winter and a 42.5 pilot in the summer. The jet needle is set at the 3rd position in the winter and the second position in the summer. Plus its also the next size larger than stock. My air screw setting will depend on the day. But typically its not more than 2.5 turns out and not less that 1 full turn from fully seated. Ive never messed with my Idle screw. But it does appear to be in all the way but the bike doesnt idle too high when its warmed up. When its cold it does idle kinda high whether I have it choked or not. [/QUOTE]
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Forums
Everything Dirt Bike
Make / Model Specific
Yamaha
please help!!!! looked everywhere on the net and cant find anwser!!!!!
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