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TR2/3/3A SU H6 Carbs

smdichter

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Need to clean up the H6's. I have a dumb question. The manuals say that the bottom of the cylindrical part of the needle (above where it tapers) must be flush with the underside of the piston. But, the needle sits in a recess that is about an 1/8" above the underside of the piston. So, it the needle flush with the recess in which it is seated or is it actually flush with the underside of the piston, in which case, the needle will sit an 1/8" lower into the jet and, presumably, mean the the mixture is automatically leaner. Thanks.
 
I set mine flush with the piston, not the brass needle holder. But I don't think it actually matters much, as the mixture nut will move the jet up or down (when you set the idle mixture) to mostly compensate for the needle being too high or too low.
 
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