I did it, I've installed the Kawasaki zzr1200 back wheel on my Legend TT. FANTASTIC; my bike was a theft salvage but what I didn't know is the back wheel was out of round with several broken spokes. Now the bike feels like riding on silk! And maybe with the smoother ride the mileage will go up. And i can use a plug to repair flat tires.
I bought a wheel with the sprocket, also 530 chain. Both the legend and the kawasaki use 20mm axles. The hardest part was adapting the Triumph caliper to bear on the smaller rotor. I've done it making adpating parts, but I'm not happy with it and may put on a caliper from a CBR or some such. Why? The caliper on the bike is made for a bigger rotor so it doesn't have to have as much mechanical advantage as a caliper that goes on a smaller rotor. We'll see if my logic works in reality.
I paid 160.00 for the Kawasaki ZZR1200 wheel with sprocket and rotor delivered. Bummer for me, one of the two wheel outer bearings fall out. Ask you seller to tape them in so if the box gets whopped in transit, they won't fall away. You cannot use them as is, but they can be adapted.
I ended up making spacers on my metal lathe to make everything fit. I could have used a step-drill and some steel washers instead, and did so for one extra shim.
Now to figure out if I can do the same for the front.
Let me know if I can be of help
toller@aol.com
saint louis, missouri