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stock jet
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Posted by: Bdav450

does anbody know what the size of the stock jet is in a 08 yfz450 and i also live in louisiana and we are below sea level so would my new jet be about two sizes bigger

Posted by: ae13291

it should be a 42 pilot jet. thats what my 04 had and my buddys 07 yfz had. and the main jet should be a 158 hex style main jets and 21 series pilot jets

Posted by: Bdav450

thanks man

Posted by: yfzrider690

He's right on the 42 pilot but the stock main is a 155.