Li150 seized. What do you think.
Posted: Tue Oct 30, 2018 7:06 am
This is my first topic, I am going to need a lot of help, as its been over forty years since I even rode a scoot. Anyway, bought a beautiful 1963 li150, rode it , checked out etc. New plugs oil change did everything to make sure it was ok. First reasonable length ride, it seized on a throttling back on a bend. Clutch in stopped. Wouldn't kick, locked and wouldn't roll in gear. Trailer home. I borescoped it and could see little head damage from some debris but no major heat damage. Thought maybe I caught a ring, detonation maybe. Anyway, I stripped it down and the cylinder slid straight off, one longtitudinal scratch but otherwise OK. The conrod though was seized on the crank. I sprayed a little pb blaster, jammed the flywheel and gave it a little tug and it came free. I am going to strip it down and go from there, but any advice from you guys would be great. I would like to keep it original if possible as it is a correct number Italian bike with perfect bodywork etc. Here is a video of the crank and a little chip you can see out of the case, what is your diagnosis so far. I was thinking maybe failed bearing and the piston damage from thepeices.
https://www.youtube.com/watch?v=ra8sybeLUv0
https://www.youtube.com/watch?v=ra8sybeLUv0