Hello this is my first time posting on this forum but not a stranger to searching on this site for great information! I have a 08 KFX 450r that has been stone cold reliable and has hardly givin me any issues. Today I went riding and I started to notice that 5th gear seemed almost like it was slipping in and out of gear. By the time I realized this I was probably about 1 mile from the lodge. So I nursed it there thinking it was my clutch but when I got stopped I noticed this noise coming from the case like something rattling. I noticed it would only rattle when I reved it up and did it the worst when in reverse. Im starting to think I might have messed something up with the transmission but I wanted to see if anyone had a similar problem before I go to the trouble of pulling the motor out. Thank You For Your Time and Help!!!