I have an o2 raptor 660. A problem has now occured. IF i ride akeep moving it runs fine but once i sit and idle for a few min it starts to boil out the overflow. Water pump seems fine as when i drained and refilled everything seems to be flowing. I do not get any lights from the guages. from what i see no coolant in the oil either. It has me stumped. I do not seem to hear the fan come on either when it starts to boilover. Any help would be great as i have a big ride over the weekend and need to solve my problem without paying 60 buck an hour at the dealer then having to buy parts. I gues worse case i could ride just as soon as i stop i shut it down. A pain but gatta do what you gatta do.

 

If the fan never comes on the engine is going to overheat. So you may want to check up on the fan. This thing happened to me once. My quad would run fine when moving but when i stoped it would overheat. Well the radiator was pushed up aganist the fan not allowing the fan to come on. Im guessing a rock flew up once when i was riding with a buddy and pushed it in or something. Or it most likely happened to the kid i bought it from. good luck