Test ran mine on the stand last week. Seem to run ok. Needles are touchy but revs well. Mine is going into a kit built Kadet Senior. Figured to spark plug lead would give it an old school igniton look. Of course like an idiot I broke the tiny little $12 spark plug! Now waiting on 2 more plugs to arrive. The stock muffler which looks like a gasser muffler is a little harsh and gasser sounding. OS .46fx style mufflers will fit it and help with the sound.