Red_Teisco
CB750 Member
I have a 1981 cb750 with about 18,000 miles on it. I've had this bike for a few months now and I've been trying to crack down on a high idle issue for a while and I can't seem to figure it out. I've replaced the boots from the airbox to the carb and from the carbs to the engine and I've sprayed starting fluid all around while it's running and didn't hear even the slightest increase in RPM. The bike idles at 1100 RPM cold even when I let it idle for a little bit to warm up.
But as soon as it gets down the road it wants to stay around 4000 - 3000 RPM. If I shut it off it then start it back up it down might go to 2500 RPM. Could it be that they're out of sync? Could it be the floats or jets? Why is it only when the bike gets going down the road? I've exhausted my knowledge.
But as soon as it gets down the road it wants to stay around 4000 - 3000 RPM. If I shut it off it then start it back up it down might go to 2500 RPM. Could it be that they're out of sync? Could it be the floats or jets? Why is it only when the bike gets going down the road? I've exhausted my knowledge.