My crf150rb runs HOT! It's been sitting for a month or so and when I started it up the other day the pipe was glowing red hot after just a couple of minutes and the coolant started overflowing. The bike is hard to start and when it finally gets started it doesn't want to idle. I've never had to deal with this issue and I'm not really sure on how to fix it. Has anybody in here ever had this happen?
We have a 2008 CRF150RB and is started fine and never ran hot, however late last week it got to where it would not idle we checked to jets and all was fine then we checked the valves and we had 0 clearance on the right intake shimmed and now runs like a champ again. If you have the carb off and haven't checked the valves may as well do it while your there.
Cleaned the pilot jet, still have the problem. I've found that when the choke is on, the bike does not get as hot. Maybe it's running lean? Maybe I should adjust the pilot screw?