See.. . with gears, now we need more power, which when we have more power, we'll then need more gears..
Its a vicious, vicious cycle.
Once my kit is together and running on the Rotten Orange, I'll see how she does, speed wise with the 9 speed Shimano Deore cassette, Dellorto racing carb and 65cc performance expansion chamber exhaust.
I'll Have to get some full on motorcycle protective gear before I try it though, as 50mph on a bicycle just sounds scary!
At least she's a high end bike and will be well-assembled.