Topic: 75 CB 550 FOUR K1 CORRECT IDLE RPM WHEN WARM

[JACKOCASTER75CB550K]

COULD ANYONE TELL ME WHAT THE CORRECT IDLE RPM SHOULD BE WHEN WARM? 1975 HONDA CB 550K1 FOUR.IM CONFUSED FOR THE MANUAL SAYS 1,000 BUT I ALWAYS THOUGHT 1,500 WAS CORRECT.THANKS MUCH

[K3Owner]

Interesting - I no longer have a tool that can measure it accurately and we can't trust the tach. I adjust the idle low enough to be stable and to allow for a good start from a stop. Shadetree stuff there. The higher the idle, the more heat that is generated. If you have lots of traffic lights ruining your ride, make it low.

[Duanob]

1200 is the norm but mine sounds a lot better at 1300-1400 so that's where I leave the idle. I've tried to sync it down to 1000 but it still rattles a bit at low RPMs.

[Tews19]

What Duane said, 1200 for me is the happy spot... Make sure the bike is fully warm before playing with the idle screw

[JACKOCASTER75CB550K]

Thanks that sounds great Ill give it a try...