air filter is new, carbs clean, havent used compression gauge, but it does have some compression.... not sure on the mods, bought it as is except air filter and Boyeson reeds. Upon initial inspection, found 10mm bolt layin in carb side of reed cage, cylinder wall looks clean with no scoring. I will get one weird sounding backfire maybe once every 10 kicks or so....
yes...on the reeds and air filter. Air filter before it quit, reeds as a possible fix after it quit. Tried several plugs... same as came out of it. Ran great the up until the day it just quit. Weird noise, then it was like someone just turned the key off. and it all happend within a split second.
Not sure when it was rebuilt, havent found any head gasket leaks. whatta u think about the flywheel key? maybe partial sheared? still have spark just at the wrong time?