Quote Originally Posted by IntheGroove View Post
Look at the muffler, that thing will never run...
1000's of engines running with mufflers like that.
1965 Rupp Dart kart - photo-briggs-muffler.png

I had a kart just like that. Except mine was blue and had a self contained hydraulic disk brake. Was was around 1968.

It morphed into a shifter cart with a Honda 70 mini bike engine in the 80's when my nephews used to visit. Then back to Briggs for my kids after the Honda died. Now has a Briggs Raptor "5hp" engine on it and would outrun the Honda 70 easily.

If you want to give the grand kids a thrill, and grandma a heart attack, any one of these engines will bolt right on.

https://www.briggsracing.com/racing-engines