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need help jetting


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I have an 02 shee and im at 650ft above sea level, temp is 65-85 I had 270 mains in and last week I melted a piston.pilots ect are all stock.I mix amsoil at 32:1 .Just wondering if these setting seem way off to anybody.My mods are

pt powerhead 22cc domes

pt midrange pipes

pro flow k-n filter

pyramid reeds

advanced timeing +4 any advice would be helpful thanks

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I have an 02 shee and im at 650ft above sea level, temp is 65-85 I had 270 mains in and last week I melted a piston.pilots ect are all stock.I mix amsoil at 32:1 .Just wondering if these setting seem way off to anybody.My mods are

pt powerhead 22cc domes

pt midrange pipes

pro flow k-n filter

pyramid reeds

advanced timeing +4      any advice would be helpful  thanks

358887[/snapback]

 

Just a thought but were you running pump gas or race gas? I am fairly certain with the advanced timing you are supposed to run higher octane fuel.

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With 22cc domes, I don't see a need for race gas.

 

That jetting doesn't sound way off. Those pipes don't flow like Fatties or Toomeys. 270s or 280s would be pretty close. I'd probably say try some 280s. Run a plug check afterwards to verify the jetting.

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