so me and my buddie are changing the track on his 03 pro x 440, and were about to take the secondary off to get the driveshaft off, we slid it about halfway and it quit sliding, we tried hitting it with a rubber mallet and we pulled as hard as we could but couldnt get it off. we managed to get the track on and everything but the next problem is gonna be getting the secondary back on, any advise on what to do?? thanks