Sweet as! Tons of goodies for them, new, old, hot, Chinese. lol
Honda had various transmissions, heads, etc. Same engine base as 100. TL, SL, CB, XL etc.
Engine is the base of the "modern" CRF230/150F so there is a bunch that can be done.
See if it's head or piston, locking it up.
Absurdly cheap jug & slug:
Cylinder Piston Gasket Kit Bore Size 61mm Honda CB145 CB CL SL XL 144 CM3 150cc | eBay