WRD-1 are the same rebuild kits as the WDA, WD, and WR. The WRD was a 1972-73 Vintage carburetor used that had a WR sized intake mounting flange but a WD sized intake on the airbox end. Standard OEM Equipment on the 1972 EXT and some of the 1973 Arctic Cat Lynxs. I use Winderosa rebuild kits with very good success and they are available from a variety of locations. Dennis Kirk, Manufacturer's Supply,.....etc.
WRC kits are unavailable.