I went for a 65 mile ride today, it was 116 degrees and 40% humidity.A little hot,on the last mile and a half back my bike felt like it was running lean so I rode with the choke on to limp back because I was so hot and tired I just wanted to get to my truck.At a quarter mile to go my bike ran stuck wide open,so I killed it,I could hear the slide move so I started it and it started wide open.After I shut it off and looked I realized it had blown the water pump seal(no coolant in the radiator,milky trans fluid.And I had just changed the tranny oil)So I walked back,when I got home I pulled the carb and the slide moves freely,Im wondering if it ran wide open on its own because of an air leak?Is it possible with the throttle closed to run wide open?It doesnt to me,but Ill have to look at it tomorrow and see what I find.