Join Date: Mar 2010
Location: Tallahassee, FL
Poor Idling after Warm-up
Okay so I got ambitious and tore my bike apart because I was having some rough idling before and figured the carbs were due for a clean. Well I tore them apart and everything was pretty clean. Soaked them and replaced the o-rings anyway and put it all backtogether.
Also, replaced everything in the cooling system except the radiator because it was pretty rusty and the metal pipes were disintegrating.
Today I got fired her up with an engine flush 50/50 water and vinegar as someone suggested and took it for a spin. She was running great but was low on gas so I stopped and dumped in a can of seafoam and filled the tank. After that she started running a bit rough, especially at low RPMs. I had to keep revving her to keep her from stalling (never actually stalled but felt like she would if I didn't rev.) I ended up adjusting the idle so I wouldnt have to keep revving, and when it wasnt acting up the idle would come up to about 2.5k.
What could be causing such rough idling? I was thinking maybe one of several things:
-Head Gasket problem? Maybe it started leaking after the bike warmed up.
-Too much seafoam? Didn't know that was possible...
-Petcock is gummed up? I did do the POOGS maintenance while I had it apart but the venting system was very clean (nothing came out of it)
-Carb problem? I followed Clymer's exactly and everything went together great.
It was just really strange it ran so well at first. Like I said she had this problem sometimes before, but it didn't seem this bad...
I'm going out in about an hour to drain the vinegar and run a baking soda flush and then a water flush. Will report back if its still running rough when I restart her cool.
Thanks for any input guys.
1993 Kawasaki Vulcan 750
Last edited by blastagator; 04-13-2012 at 02:50 PM.