Originally Posted by mwolff
have gotten the starting routine down, and it has never failed to start after 3-4 kicks, and it idles perfectly, but then runs kinda rough at speed. It seems to have plenty of power, doesn't backfire, just runs rough as the RPM's climb. I adjusted the valves, they were pretty loose, and changed the plug, it was old but looked like it was burning fuel properly.
Think also the silencer ... the spark arrestor inside may gets clogged up from soot at the point that the engine seem seized ! - since is practically impossible to dismount it even after 2 months ... just punch open with a big scalpel the inner tube.