Re: High idle - no vacuum leak
Posted by
seestheday on
Apr 27, 2013; 6:32pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/High-idle-no-vacuum-leak-tp4039923p4039926.html
EDIT: Lucky is right - I'm not afraid to admit I'm wrong - the idle jet on these carbs is located beneath the rubber plug and is not removable without drilling. I'm going to have to search a little to resolve this. I hope I don't have to do anything major.
Original post below:
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You're right. Changing that 105 down to a 102 won't make a difference. In the dohc's the 68 is the idle jet. That is what I need to focus on if I'm changing jets. Anything else I should be looking at? I'm guessing the combination of the increased lift and duration from the cams and the increased pull on exhaust gasses from the wrap is causing the issue.
As always, my bike is in my sig. It's a 1981 cb750K.
For reference, here are the carb specs for these DOHC carbs. They only state "primary" and "secondary" main jets. It is the "primary" in these carbs that is accessible at idle. (THIS IS WRONG)
1981 CB750K with 900 cams
90K KM's, rebuilt head, rebuilt carbs, upgraded valve stem seals
My wife's recipe website that I'm trying to help promote:
Strawberries for supper. Yes, I am a lucky man.