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Its all done to the carb bowl. ifyou have a stock M bowl,, hers is what to do: remove the carb bowl, remove the metering stem, and the main load adjustment screw. Find the drill bit that fits in the main jet as tightly as it will fit,, that tells you the size,, then your gonna purchase 3 drill bits,, 3 sizes larger than stock, 5 sizes larger than stock, and 7 sizes larger than stock,,,,, ,
Take the smallest bit, and drill out the botom 2 holes of the metering stem, then take the second bit, and drill out the main jet. blow out the shavings, and try it. What your looking for is to be able to run full throttle rpms, and back out the main adjustment until the engine runs rich, it will smoke black, blubber, thats the sigh, you have it big enough to supply theengine with plenty of fuel. NOW, lets say you cant make it run rich, take the drill bit that you used to drill the main jet, and redrill the bottom 2 holes of the metering stem, try it again,,, If its a stock M, Im gonna go out on a limb and say drilling the main jet 5 sizes larger, and the matering stem with the small bit, you should have plenty,, but, there is always the possibility, that you need to go bigger. yeah hollar back!! Let me know whats up! ChadS
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