I just purchased a 2003 YZ 450F. Bike has a rekluse clutch installed on it. We were out trail riding and I noticed that I had to give it quite a bit of gas to get it going, as we neared the end of the trail, in a deep sand area; I lost all forward movement. After that the clutch would not disengage. I can shift into the gears but clutch won't disengage. I'm not real familiar with the rekluse clutch and would like some recommendations before I start tearing the thing apart.