So as i have said on another post my poor girl is in need of a birthday... everything will be getting stripped back painted, re-packed, re-built, new gaskets, new everything! Stay tuned for exciting happinings
Those numbers on the engine block... Isn't that how wreckers/dismantlers mark their available parts in stock? If so, does it mean the engine was replaced at a certain stage of the bike's life? If that's the case, I'm glad you are going to rebuild it. The bike might show 100,000 ks, but engine could be a lot older than that.
A thread from @Mike Norman & @Dave Moss Tuning on their MC22 build to inspire you https://www.2fiftycc.com/index.php?threads/dave-moss-cbr250rr-mc22-racing-in-california.8371/