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Posted

Last 421 I tuned burned perfect at .1225 dump n main. 52 pilot with the pilot circuit drilled to .030. EGN needle 2nd clip from blunt end. My buddy's 421 300' bike liked  .120 dump /main for the shorter distance.

Posted

A lot of people also don't realize to clean a bike out at stand still you have to stay off the power jet . You have to find the sweet spot rite before you start pulling through the pj or it's gonna throw raw fuel 

Posted
A lot of people also don't realize to clean a bike out at stand still you have to stay off the power jet . You have to find the sweet spot rite before you start pulling through the pj or it's gonna throw raw fuel 


Hmmmmmm, never have heard of this before. Sounds like a very great point..I'll have to see by not revving so high if that's what's happning. .

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Posted
Did you gap the plugs at .018 , if not you could be blowing the spark out even with that much spark lead 


Yes plugs are gapped. Bought a feeler have just for that reason. In the beginning I didn't. Then I started to, made a world of difference of how the bike ran

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