He has the Grubee KC, which is what
http://www.motorizedbicycle.ca/ sells.
Good supplier, but no reed or case induction engines, just the Grubee Skyhawk.
Reeds are not the do all for power. You really need case induction to make them work.
Undercover BB, speed costs, just how fast do you want to go?
I get almost 60kph out of 1.5hp. I find that quite fast on a 27 lbs machine with poor brakes.
To get 80kph on the flat I'd need about 3.3hp, or 5.3hp if I want to do it up a steep hill.
I am pretty sure, based on previous 2 stoke experience this is possible.
Still, this doesn't compare to the 12hp or so a KTM50 would put out.
Fitting is always a problem. If it was easy, EVERYBODY would be doing it.
Steve