Re: Float Bowl Adjustment

Posted by Lucky 1 on Jul 23, 2012; 10:51pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Float-Bowl-Adjustment-tp459762p4025728.html

You did not say anything that could help me to help you find the problem.

For instance "72/74 CB750."  What does that mean??? 72 carbs 74 engine? 72 engine and carbs and 74 frame?
74 engine and carbs and 1972 frame????  Cheeeesshhh.

The #3 carb. "First, it was overflowing (I adjusted the float), then it seemed to develop a bloakage and no fuel was making it to the bowl......"

You need to put in 4 brand new float needs and seats. You cannot adjust or clean a worn out float needle. Either it works or it does not work. If it is more than 2 years old it probably needs replacing.

You need to buy a workshop manual.
The float level is determined by the type and year of the CB750 carb.
The 1972 or 1974 carb was 26mm or 1.023 thousandths. Measured with a ruler or a float gauge.
 Clymers manual Illustration #13, Chapter SIX, Page #125.

You may have surging if the float levels are off.
You may need rejetting too.

But I need all the fact to help you.

Do you have the 657A carbs or the #7A carbs.