Ty, I'm proud to be a member of the 20mph Club!
The 6.5hp 200cc motor you showed would possibly be great for a racer, but would generate a lot of legal issues once you tried to run it on the street.
As thegnu already said, there would be quite a bit more work involved, using that on a bicycle. and expense.
I think I would advise the 99cc predator engine, if you don't wish to join us in the frustration of a chinagirl kit.
At this point in time, with what we have to work with, commonly, that 99cc predator is about optimal for power, and you could stand on good ground as you presented your case before a municipal clerk, when you got into court.
Otherwise, you might as well build a motorcycle and register it as such.
Best
rc