Has anyone figured out the cause of the hot stall issue??? I've been searching for days. I have a 99 CBR 600 F4. I have replaced my battery with an expensive odyssee 310 battery, new and higher wattage stator (my old one went out because of the excessive draw/brown outs), a new and improved aftermarket R/R, and water wetter. My bike runs a heck of alot better than it did before now that I replaced this stuff, and charges like it should. However, my bike still stumbles a bit only when the fan comes on at stoplights. Has anyone ever replaced their cooling fan motor before with a more efficient one? I believe replacing this would solve my issues. I was looking at F4I fan motors and they have a different part number than the F4 fan motors; perhaps the F4I fan motors draw less power? Does anyone know? It looks like the F4I fan motor would bolt right up to my bike.