Hey everyone. I just picked up a 1980 Puch-Murray moped and I’m in love. It’s perfect. The original owner ran straight gas on it and seized the engine, gave it to someone else who put a new piston in it, then sold it to me. It runs great now, but the only problem is that when I get it on the open road it won’t do above 10-15 mph. I’m thinking it’s either not shifting, or it’s just bogging out because the Rpms are still pretty low When it happens. Any suggestions?