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How to determine existing pilot jet size ?

Fuel/Carb Related - Harley Davidson Forums - www.hdforums.com
First time post here. I've been doing a lot of reading and learning on this forum. You guys have provided a massive library of information, but I've finally reached the point of need to ask for help. Thanks in advance!

Just aquired my fisrt HD last fall. A a very pretty 1999 Dyna wide glide with the 88TC engine. The cam tensioner failed so I upgraded to the S&S gear drive with .510 lift cams. Now im getting carburetor pop off idle. Adjusted idle mixture screw out (richer) four turns. Almost lean enough but need to re-jet. Have pulled carb and pilot jet. I know I need to go one or two sizes larger. However I cannot determine what size the pilot jet is that I have now. I'm pretty sure its not stock because of the Thunder Header pipe and aftermarket air cleaner already on it. Is there a way to determine current piolet jet size by looking at it for measuring it?

Thanks again!
Date: Jun 19, 2017   


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