I have an 82 Z50 that ran great but was starting to smoke so I put a new piston and ring set in and honed the cylinder. Set valves to 0.02 intake and 0.03 exhaust. However now I’m only getting 60psi compression. Bike idles just fine and runs great in neautral. But under load it can hardly make it up a slight incline. Flat ground is ok but almost dies going up a hill. Any info would be great. I know compression is low but it did run great before hand. Note, I didn’t do a compression test prior to rebuild. Any help is greatly appreciated!