I have a problem with my 92 xr600. I just got the bike back together this week and went out tonight to buzz around on the trails. It ran ok for about half an hour, but then it got a little funny. It'd run fine wide open but when I'd slow down to turn the engine would be racing (high rpms, like it was running lean). Other times when I was on the road moving to a new trail the bike would stall when I slowed down for stop signs, I'd pull in the clutch and let off the throttle and it'd stall (actually, it's always done this but tonight it wouldn't bump start again before I stopped). When I got tired of riding and came home I left it running in the driveway. It seemed to be running fine but the it just shut off, no sputter, no cough, just shut down. I started it and it wanted to run fast again, then shut off. Started again, wanted to run a little slow. Poof it shuts off again. I left it about 5 or 10 minutes started again but it didn't stall this time. Any ideas why this might be happening? gummed up carb? frigged up electrical? I've had to take the bike apart twice in the last month to get the frame welded. So everything has been sitting around the garage for a while. The carb was wrapped in a clean rag though. this is very frustrating trying to get this flakey bike running properly. It worked fine a month ago, actually it was running great. please help.