The new to me cb750 four needed the tacho drive seal changing so I ordered a new one and whilst I was waiting on arrival I thought I'd take my time getting the old one out, and bloody hell, what a pain, it wouid not budge! In the end a dental pick managed to get the seal out but here's the issue, the tiny o ring that sits inside the seal is missing!!! I carefully felt around the tacho drive shaft to see if it had come away and positioned itself around that but I couldn't feel anything, I looked for it on the garage floor but could not see anything, my worry is that it may have fallen inside the rocker cover itself
if that's the case it means having to take the motor out of the frame as the rocker cover won't clear the top rails whilst in situe, what should have been an easy jobmsy prove to have been a nightmare.....
