Picked up my first Sachs the other day and am experiencing a big lack of power/speed now that I’ve got it running. It’s a 79 G3, 9,500 miles with a 505/D and a bing 85/12/104.
What I’ve done so far:
1. Cleaned and rebuilt carb, fuel lines, in-line fuel filter.
2. Added new stock air filter.
3. Changed transmission fluid.
4. Checked wheel bearings.
Moped idles smoothly, and starts on a quarter kick. First test ride, accelerated quickly on flat ground, no issues.
Second ride, accelerated well at first and felt a noticeable shake/skip in the acceleration. Immediately stopped and brought back to garage. 3rd ride attempted to reach maximum speed, no “skips” or “shakes” but only managed to reach a top speed of 20mph on full throttle. Moped smokes like hell running and at idle. New to this motor and couldn’t find any clear answers after searching.