3 speed

Hey all, a lot of my Google searches for info kept bringing me here so I thought I would join!! I have a Murray Beach cruiser w/ 3-speed rear hub & coaster brake. I also have a need light little 3hp Tecumseh 2-stroke off of a Toro snowblower....I'm looking to get these two hooked up. I was...

has anyone motorized a beach cruiser with a 3 speed internal hub shifter and put a shift kit on it? it seems like it would top out to fast in 3rd gear.