Its me again with the Yamaha Champ (basically QT50) that wont start despite having all of the needed essentials. Now I really screwed myself and am one step closer to giving up (man I really dont want to), I stripped the threads in the head by inserting and removing over and over again and using a plug that was not intended and turned out to have different thread spacing. Now what?! Not only can I not figure out my moped mystery, i cant even try now because my compression is shot as it leaks out around the threads. Should I try the liquid thread repair used for autos, ot search for new head. And by the way prior to this i STILL cant get my other problem discovered.