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fripple
12-11-2006, 10:00 PM
What size jets are in the SE 42mm carb from Harley? Reason I'm asking is that I get some decel popping with my bassani pro streets.

Mike
12-11-2006, 10:00 PM
Stock for a 42 HSR is 160 main and 25 pilot. Typically you can reduce decel pop by adjusting the idle mix screw (brass screw on side of carb above the idle speed cable), turn IN 1/4 to 1/2 turn (richer). Try this before changine jets. Change jets if your mix screw is more than two turns out or less than 3/4 turn in, from bottomed.
Note that an open exhaust will tend to decel pop more than a more restrictive system.
Thanks, Mike