For many years now, I have had a strong opinion that Ryobi should get into the go-karting business--with their modular 31cc 2-stroke motor and numerous blower, edger, tiller, hedge-trimmer, etc attachments. Would it really be that difficult to offer a go-kart attachment using the same bracket mount?
I get the high-rpm, low-torque issue but surely gearing could overcome that and what it may lack in comparable driveability, it would make up for that in how easy it would be to replace the motor, upgrade components, etc.