Hi, please excuse my ignorance but I am struggling to find the info I need. We have an '89 1100k, can anyone tell me how I can tell the difference between the drive gear please? we have quite a few lying alternators from gsxrs and bandits around, Eblag bargains ect, we dont know what the original gear is from the engine as it was replaced by previous owners. thanks in advance (Ihave a photo of our alternators, but its too big for the site) Sarah. xx