[ariel]

I have an 04 150f. I use it for some track and some trail. I have done long trail rides before with no overheating problems. Last time I was riding on a cool evening after about 45 min the engine started to pop and bog. I let it cool for about ten min but it came back sooner than before. I rode down the road all downhill and all the way home no problem. Why dose my bike sudenlly overheat. my oil is full and I change it often. I live at sea level and run a 110 jet.