Hey guys, I've done a lot of reading but I can't find anaything about this symptom.
I left my stock '99 bike parked in a lot under a cover for a month. The bike is in Kentucky where it's hot and humid. The bike was left with 1/4 tank. The problem started on the first ride. It started with a normal warm-up but the needle had an occasional tick where it would jump 500 rpm's. After warm-up and the choke closed I went to give it some throttle. When I did this the engine reved up to 4000 and then would struggle to get any higher and would start bouncing up and down between 4-6 grand.
I checked the plugs and they were all normal except the rear right, which was black. I added 4 oz of seafoam to the 1/4 tank and expected a change. It sounds a little low and it is definately running rough. It stalls with a quick pull in the throttle but after moving the throttle will wind the revs all the way up without any trouble.
It used to get ~ 50mpg and since returning it is getting about 30 mpg. I replaced the plug with no change. Again, it idles starts and idles normal. I'm still waiting for the seafoam to work it's magic. There's no telling what the heat did over a month. Help! Thanks.
Last edited by wheeler; 07-19-2007 at 11:03 PM.