We have 2 Honda Valkyries both with CSC trike kits. 1 is a 1997 and the other 1 is a 2000. I have replaced the air shock on the 1997. I am having trouble finding these shocks. Nobody I've talked to has them in stock and it sounds like Honda might not be making them any longer. The Honda part number is 52400-MY4-013. It is a shock from a 1500 goldwing. I would prefer new, but a good used one is ok also. This picture shows what it looks like.