Re: 79 CB 750K tuning issue(Possible Accel pump issue?)

Posted by lakeguy556 on Sep 10, 2012; 7:22pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/79-CB-750K-tuning-issue-Possible-Accel-pump-issue-tp4028920p4028977.html

Appreciate the advice fellas, however after doing some reading and thinking, I'm having trouble buying that the carbs are even the issue.

Short of giving the accel pump the attention it may have needed, I know that the rest of the carb rebuild was meticulous. Everything was replaced. Carbs were soaked, sprayed, rinsed and blown out. The other issue I have with this is that it just runs to perfectly down low to the 5-6K point. Its almost like it hits a hard line at 6 K and wont budge.

Just spit balling here and it could well be something in the carbs but I'm leaning more towards electrical now.

Ignition timing/Spark  advance maybe?.

When it gets to that 5-6K mark it does almost seem as if its cutting spark. I also seem to be getting some popping out of the exhaust at that point.

Battery shows 13.8 volts above 3K rpm, so the charging system seems to be working. I'm going to pull the pulser/generator cover and hit it with a timing light.