Re: 66cc Bike Engine Caught On FIRE!!!
There's a reason there's a cover there - and it's not so it can be taken off to run cooler. The only reason it would get hot is if you're butterflying the clutch, treating it like you've got gears based on how hard you pull the lever.
Speculating is the wrong word, as he doesn't claim it IS slipping. "Will make it slip" is future tense, and that's more like prophesying.