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Re: 82 cb 750sc idiling problem

Posted by motogrady on Aug 23, 2013; 1:32pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/82-cb-750sc-idiling-problem-tp4045060p4045107.html



Nice to meet ya Paul, Grado here.

Being a nighthawk, I'm not really sure on the carbs you have.
If they are CV, that is the slides are drawn upwards and open with the vacume (sp?)
they should work the same as mine.

You may be on the right track, yours are acting just like mine did.

Carbs..........remember, the airscrew and small jet inside the carb feed the bike
for idle and the first 1/4 turn or so of throttle, after that the needle in the slide and the main jet
feed it the rest of the way to wide open.  The knob just acts like you are keeping tension
on the throttle cable with your hand.

Coming off pods, who knows what size jets he has in there, when you knock them down you can check them, they're stamped with size.  They should be bigger than you need, airbox kinda chokes it.
If the PO knew what was up bigger jets went in with pods, and bigger still with 4x1 exhaust.
More air moving thru the motor, you needed to mix more fuel.
Too big, you run rich, black tip sparkplug.  Too lean, white tip plug.

I think I'm running 68s and 110s, on a bike with a 4x1 exhaust and a super secret modified air box.

good luck dude........grado