Hey Gamblesci22! My Pk80 from CM had less than 10 miles on it when one day I began the pedal start and the engine cranked VERY sporadically. Turns out that the clutch assembly retaining nut was finger tight and had started to spin! I cleaned all fastener surfaces with Acetone, reformed the star washer, applied blue Locktite and carefully torqued the nut to felt maximum force. I then let it cure for a few days. Thankfully, it's been okay since then, but I never saw this on my 49cc Grubbee-Gearhead437