carb hiccup
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Joined: Feb 2010
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carb hiccup
Good morning group...I recently purchased a '90 FLHTC with 37K on the clock, in excellent condition. Lately, I have had an occasional "hiccup" I am assuming from the CV carb, mainly occurring around 3100-3200 RPM, at cruising speed. Sometimes, I can ride all day with no symptoms, and like yesterday, I will get 2-3 hics, level out for 5-10 miles then more hics. This is my first CV carb, and I'm not sure where the problem lies. Any suggestions out there?
Road Warrior
Joined: Jul 2006
Posts: 1,532
Likes: 7
From: Rochester N.Y.
My first thought would be improper breathing of the fuel tank.
I don't know how the older bikes vent , but it probably has a pressure/vacuum gas cap.
You would have to see how your bike vents and make sure it does vent properly.
You could ride with the fuel filler cap just a bit loose and see if you can duplicate it , if it's fine , you found the problem.
A buddy of mine had a tank that partially collapsed when he had a bad gas cap , fuel injected bikes can do this , but carb bikes just lean cough usually.
Just a thought before you go digging around in the carb for a solution.
Mick
I don't know how the older bikes vent , but it probably has a pressure/vacuum gas cap.
You would have to see how your bike vents and make sure it does vent properly.
You could ride with the fuel filler cap just a bit loose and see if you can duplicate it , if it's fine , you found the problem.
A buddy of mine had a tank that partially collapsed when he had a bad gas cap , fuel injected bikes can do this , but carb bikes just lean cough usually.
Just a thought before you go digging around in the carb for a solution.
Mick
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