CBR issues

[gixxer72]

00 CBR600F4

The starter turns over very slowly, like a weak battery. Apparently it's been doing it for weeks, but it will start and run, somewhat roughly. It's got the appropriate model AGM battery. I tried charging it, but no change. Most battery issues I've had in the past were quick and no start. Is it possible this battery is holding V at level just enough to start for this long? Could that low V in the battery cause rough running/stalling??

[jasnmar]

Many possibilities unfortunately.

Is the battery actually holding a charge? Throw a multimeter on it and see if it's holding voltage.

If it was a reg / rec issue charging the battery should have at least made it start easier.

Could be a bad starter. That shouldn't make it run rough.

Outside chance at a float being stuck open, flooding a cylinder with fuel, making it hard to start, and run like crap.
Try taking out the plugs and starting it. It won't start, but if fuel shoots out, you'll know.

[loudbeard]

Also worth checking all of your grounds, those are free to check out and can definitely cause a weak starter.