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4 mill jetting


Jaystre

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Sprinklerman is correct about the part-throttle plug chop. If you need to get downright accurate to what part of the needle, You can check slide height, mark throttle lever or run the stop screw in to hold that point. Make sure to NOT let off from where you are testing 'till the engine is stopped.. A few times through this and you'll be doing it by feel without all of the hassle I just spelled out .

 

I agree with above too. You are into DET! Set the timing at zero 'till you have the jetting where you are happy, then play with advance afterward.... :)

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