I was just wondering what would be the advice form experts, first why, what should I look for?
Also what to do now, is it worth fixing or just keep the motor for spares? (I did buy another motor already)

Bike is PGM2 MC18, bought it as is from the guy who was trying to build a race bike and gave up, felt like it had compression but once I tested it was 130 psi front and 70 psi rear, this is why