I just recently bought a 1980 Peugeot 102 sp U3 for $120. I was able to get it running. It has a new spark plug with the correct gap, the compression was 150psi and it had a Dell'Orto 15.15 SHA on it. It spits a ton of air/fuel out the carb intake when I open the throttle under load and has no power. The emulsion tube holes had been drilled out way too big so I purchased a cheap carb to see if that helped the problem and it didn't. I am convinced it is not a problem with the carb and probably not the spark. I am also sure that my engine does not have reed valves which is what I was hoping it could be. From what I could gather it might be worn piston rings? (I don't quite know why this could be if the compression was so high.) I ran searches through this forum for pertinent threads and found none so here is my cry for help. I am brand new to mopeds and engines but I am wanting to learn and already know a fair amount. Thanks for the help!