Walbro K13-WYK Rebuild Kit for WYK Carburetors (WYK-33, WYK-58, WYK-194, etc). This is the new Walbro K13-WYK rebuild kit and is good for all WYK carburetor models. Replaces these walbro part numbers: D13-WYK, D20-WYK, D21-WYK, K20-WYK, K21-WYK, and K22-WYK.