I have spent the last 4 months restoring a 1980 puch maxi, Looks like new, and I bought a 70cc speed kit from www.mopedjunkyard.com with the AMAL carb. The engine runs and idles beautifly, but when I hit the accelerator, the engine revs a tiny bit and bogs down.!?!?!
So far I put new fuel filters in, new Spark plug, new points, checked the timing, compression, tuned the carb several dozen times, and cursed with no change to the engine.
Has anyone had this problem before, or might know how to fix it?.. maybe I missed something.