This is a new very high quality and very correct accelerator return spring clip. This it the little clip that is always missing in the 134L flathead motor. This mounts under the rear carburetor mounting nut. This is what holds the accelerator return spring. This fits the Carter WO just fine. NOTE, For the Solex aftermarket carburetor you will have to grind just a tiny bit off the back side. The Solex is just a tiny bit fatter on the base. Part number WO-A1173.