It seems like i ride and it pushes coolant into the resevoir then when i stop it pisses out, by the third time this happens it is really low in the radiator on coolant and overheats, what i have done so far is 2 new thermostats, new water pump, engine ice, and it has been vaccuum bled, the fans are turning on. and i also have 2 new rad caps, i even got a higher pressure cap, this didn't help at all. Im all out of ideas i have had shops tear into it and have about 2300 dollars in shop bills so far not all related to the overheating. It is exhausting and frustrating having to explain to everyone that the yamaha is in the shop again. It has been to yamaha twice, I had the motor rebuilt with new rods bearings and all that stuff last summer so it has a new head gasket. i have toce quad pipes on it but they are a slip on wouldn't think they would be bad for it. any help would be greatly appreciated the only thing i haven't replaced is the radiator and the hoses and tubes.