Hi all, I'm no mechanic, but I'm doing the best I can to fix my CBR900. I've traced an oil leak to the front sprocket so I'm pretty sure the seals around the main shaft are worn. After removal of the front sproket I've found that the leak is definately coming from around the seal, and also I can get some movement in the main shaft when I wiggle it. So the conclusion I'm coming to, is that I have to remove the main shaft and replace the seals and the bearing. Am I on the right track here? I'm guessing that to do this I'm going to have to drop the whole engine out of the frame somehow and then take it all appart on a bench top. Am I right? is there an easier way to replace this bearing? I'm a little new to this. Thanks in advance for your help guys. Josh.