high-speed missing, high idle once warm--1980 cb750F

Posted by Waylon-2 on
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/high-speed-missing-high-idle-once-warm-1980-cb750F-tp460585.html

Well, the bike has carbs from a cb750k. I've cleaned them out and synched "by ear." Runs like a champ until about 7000 rpm, then starts missing.

Also, once the bike heats up it wants to idle for a while at 5000. I can turn down the idle screw but it'll do it again as soon as I pull in the clutch approaching a stop. When I pulled the carbs I noticed the throttle plates on 1 and 2 were covering the secondary (or primary?) jet holes and the plates on 2 and 4 were not. So I adjusted them so that all 4 were set behind the second jet. Could that be the reason for my high idle?

But what I really wanna know is where is my high-end power?

many thanks in advance!