Training Wheel Hero
Join Date: Sep 2014
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Bad idle on 09 CBR
I've got an interesting idle problem that developed a couple hundred miles ago. Basically, the bike will idle rough and the RPMs will bounce around between 1000 and 1500. Sometimes it isn't that bad and it only bounces around slightly. If they start to bounce around too much, the bike will stall itself out.
Now for the interesting part... If the bike is idling very rough and I turn my high beam off, the idle smooths out and its almost perfect. If the bike is idling only a little rough and I turn my high beam off, it idles perfectly. Also, if the idle is rough, I can flip the kill switch off and then start the bike back up and the issue is gone.
What in the world could this be? Before I found out about the high beam thing, I ran some fuel injector cleaner through it thinking it was bad fuel and it made no difference. The bike is an 09 CBR600RR with 2900 miles. I got it about 3-4 months ago with 900 miles and its been perfect up until now. The bike is 100% stock (well, except for brake pads lol).
Edit: Forgot to mention, it throws no codes.
Last edited by Onion; 09-04-2014 at 11:04 PM.