I have a Polaris Xplorer 300 4x4 and I recently had the top end re-done. The first time I took it out, I ran it about ten minutes. After that, it looses power. It bogs down. When you put it in neutral, and rev it up, it acts fine. If you put it in gear, it doesn't go anywhere. You can push it, and rev it up to go, and it will be fine until you stop and it will do it all over again. Thanks for your help.