Thought I would start a new thread as per the title and start it off with the below: - A 254XP, lean seized - I have cleaned the cylinder of aluminium transfer, lightly abraded the cylinder with wet and dry, fitted a new piston and pressure checked it...all OK. Unusual as it had seized on inlet and outlet piston sides.   Compression measures 145psi but expect this to go up once fueled and run - the cylinder has some light scores but will run and have decent power once done.