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Old 09-25-2012, 08:06 PM   #8
cheap bastard
JeffS77's Avatar
Joined: Apr 2006
Location: Riverside , CA
Oddometer: 3,377
The needle jet/emulsion tube determines the raw amount of fuel available across the range and the needle taper is used to fine tune delivery in individual portions of the range.

The tube is a pretty damn important piece I think a lot of people over look and just chase with jets and needles.. I learned the hard way in the past that this can be a deciding factor to weird mid range issues.
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