Originally Posted by Nihon Newbie
If the 125 is anything like the 150 in this respect, the shaft is held in the transmission case with a press-fitted bearing, and if you remove the shaft, you need to replace that bearing, too, and hopefully with the appropriate tools, i.e. a bearing driver.
When you mentioned the bearing in the shaft it got me wondering. Could it be a bad bearing that is causing the shaft to wobble? I might have the tools to press a new bearing in at work. When I turn the shaft by hand I don't feel anything out of the norm though and that makes me think its the shaft, not the bearing. I should feel friction otherwise right?