This is a K13-WYK repair kit for the Walbro WYK series carburetors. This is the only kit that used on these carburetors. Walbro has replaced the D13-WYK, D20-WYK, D21-WYK, K20-WYK, K21-WYK, and K22-WYK with the K13-WYK. If you have a WYK carb, this is the
Gizmo's Racing modified Walbro wt-257/WT-1027 carburetor. The 1027 is identical in every way to the 257 just renamed because it's now sold through Zenoah/Husqvarna
