Hey everyone my 07 yfz450 is overheating withing a matter of a few minutes from the time I start it and just let it idle. It will get to the point that it starts boiling and coming out of the tube by the overflow under the seat. If I let it cool down then start to ride it easy it will be fine but once I get on it a little then it starts to overheat again. Any ideas? There is a brand new boysen water pump on it and I just replaced the water pump seals and I am 100 percent sure that everything was installed properly and that the impeller shaft was in good condition and not scored in any way before being re installed. Any feedback would be appreciated guys thanks!