Unfortunately, TriWing is the only one making a true trike kit for the RSV.
I was told by a Goldwing/Champion dealer that the problem was with Yamaha's drive shaft. That and their isn't much demand for a Yammi trike as a Goldwing.....
I think it's more of the latter as I feel sure mechanical problems can be solved. That's why I won't spend the money on the TriWing kit. The other alternatives are mostly training wheel type setups....
I look forward to purchasing my Goldwing trike next Sat, the 26th.
I looked on ebay and the goldwing rider site for used trikes and found that 10 year old goldwing trikes are bringing about $17K!!!!
Have a great day all,
Alex