If not, I have a set of sand gecko's, I think they are 21" tall on douglas rims.
(check the tire size as that will make a huge difference with gearing!!!! and performance).
I ordered some new tires:
Skat Trak 24" 16 paddle Staggered paddle Extremes!
(a serious, serious tire!)
Mine are off a banshee, so they will fit. I think honda and yamaha have different bolt pattern. Check in to it.
If not, Ray, (Minkia87) on Ebay has a garage full of banshee parts and several pairs of paddles, I can dig up his Email if you want it.