Hello, have a 84 YTM that I would like to put new crankshaft bearings on. According to a manual it says that if there were to be any damage to the cam chain sprocket that the half of the crankshaft its on would need to be replaced. Can I not press this gear off the crank to replace the bearing? I guess I might not be seeing a reason as to why it wouldn't press off. Any input would be great, Thanks!