I just changed the gearing around on my bike (1995 XR600R) from 14/48 to 15/45. With the 15 in the front, the cover that goes over the cs sprocket (I have no idea at all what that part is called) interferes with the chain, preventing it from moving at all. Everything is perfect if I take that part off, but I'd rather not, just in case the bike decides to throw the chain (I don't how what the chance is of that happening, but I'd rather not take the risk). Any ideas? Thanks!!!