640-12001 Starter nut, choke

This Mikuni starter nut is the threaded retainer used to secure the choke or enricher cable to the body of an HSR series carburetor. It provides a secure connection point, ensuring that the starter plunger can be operated reliably for cold starts. Made from durable materials with clean threads, it is designed to withstand the rigors of frequent use and exposure to the elements. A damaged or stripped starter nut can lead to air leaks or inconsistent choke operation, making this genuine Mikuni replacement an important part for carburetor maintenance. This starter nut is sold individually and fits standard HSR enricher circuits.