I have a 2006 YZ that seems to get really hot, then stalls. I ride mostly single track, first gear slow stuff. 5000-8000ft elevation. Once it stalls it tough to start. Hit or miss with the hot start. Goes through a bunch of coolant. Need to add 6-10oz per ride. I don't think there are any leaks but.... Has fresh motor (2 rides), jetted correctly (by local shop), carbs completely gone through. The bike rips for a while then wants to stall. If I pull in the clutch for a few seconds, it stalls. Really need to stay on the gas for it to keep running once its hot. Also has a big gas tank on it. Can these affect cooling? Air temp has been cool (50ish) Kind of a pain when it stalls in the rocks!