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Old April 25th, 2014, 06:57 PM   #173
cadd
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Name: Cadd
Location: 41°21'13.1"N, 74°41'37.4"W
Join Date: Jan 2014

Motorcycle(s): 300

Posts: A lot.
MOTM - May '15
Quote:
Originally Posted by alex.s View Post
one of a few things maybe...

1) idle air screw out too far. should be right around 2 turns out from all the way in.

2) your petcock is sticky and at low rpm it isn't enough vacuum to open the petcock adequately starving the carbs making them lean or maybe you have a slight vacuum leak

3) your idle jet is still partially clogged and you have gotten around the issue by turning the idle up but once its nice and warm your idle goes too high
1 - I set mine to 2.5 turns out for both carbs. Maybe I'll tighten it to 2.0 turns out instead? This fuel/air mixture adjustment is only for idle? Or does it affect the fuel/air ratio throughout the rev ranges?

2 - if anything, I think I may be running too rich. Took original plugs out and both were pitch black. Is there anyway to test for vacuum leak?

3 - idle jet extremely clean. I see light through the tiny holes when I took them out to clean.
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