maybe this is why your bike is overheating like you stated in your other post. yeah deffianately check to see if the fan works. maybe simple as mud built up or it or a stick, or it could be something electrical. either way check into why your fan isnt working. if you cant figure it out, take it to a shop, it should just be some simple trouble shooting. if you had a manual you could probably find some test for the fan in it.