Re: 1978 cb750 carb swap

Posted by Lucky 1 on Apr 20, 2012; 4:14pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/1978-cb750-carb-swap-tp3911046p3926465.html

The needle controls the midrange from 1/4 throttle to about 3/4 throttle.

About your mixture screw.
Gently turn it all the way in and when it stops do NOt tighten it .
Then turn it out to the desired amount.
With that #45 idle jet that you drilled with a #77 (numbered size drill)
Your mixture screws should be out about 1/2 to 3/4 of a turn. Are they?

To tell which idle jets you had originally, look on the idle jet
near the top with a magnifying glass and you will see the number.
 If you drilled that jet out, file the number off!!!!