All I can find are 2:1 ratio but is there a 2240:60 speedo drive?

Also does anyone know if the Dakota Digital rear wheel speed sensor works with stock electronic speedometers?

 

There are 2240:60 speedo drives. They are for 16" and 21" wheels. XL's used to have the 2240:60 units I believe as well. You may end up having to get something fabbed if you cannot find one. Give Stock's Harley-Davidson in Manitowoc P-(920) 684-0237 a call and give them this pn#67400-97 which is a rear axle speedo drive kit. They are showing as still having one on hand. See if the cable would work on your scoot. You could also JP Cycles or VTwin Manufacturing as they might have something.