I have bought a 1996 polaris slx 780 2 stroke I have had alot of fun on this machine this year but since riding it I have noticed that I have oil leaking from the acorn nuts on the top of the motor. I assume that the head gasket is shot and I would like to rebuild the motor but I do not have a service manual and was hoping that someone might have on to download or a good site to download a free one.