Re: !977 cb750k carbs

Posted by Lucky 1 on Jul 21, 2013; 11:59pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/977-cb750k-carbs-tp4042987p4043813.html

Does the needle just have one clip on the needle?

If so you have two choices.
One choice is to put washers/shims on the needle to raise the needle.
The other choice is to find some 1976 or 1977 needles that ARE adjustable.

IF you go with the shims you will need vernier calipers to accurately measure them.
If you add one .020-,.022 thousandths shim and it sits on top of the pocket in the bottom of the slide,
that pocket is .012 thousandths deep so it will raise the needle a total of .032+ or - and that is qbout 1/32
of an inch. PErfect.

IF the shim/washer sits down inside the pocket in the bottom of the slide then you will need to have two shims that equal .032 thousandths. Make sure the shim does not get stuck in the needle holder.

But you have to raise that needle if it has pods or stacks and aftermarket exhaust.
Otherwise the throttle response will be very poor when giving it quick throttle.