There is plenty of poke with a carb'd fireblade donk. Easy to wire in, get a dash blank and just put in the bike clocks with the spedo hidden. Plenty of places to buy flanges to replace the sprocket, a custom 2 piece prop and suitable centre bearing. Don't bother about reverse. Put a push bike speedo in, illuminated by a high output led and thrash the life out of it.
Don't believe those that have never even driven one that will tell you how it will never work. It does, and it is a brilliantly bonkers way to enjoy a seven.
All the best
BB