TM42/19 Throttle return spring

This Mikuni throttle return spring is engineered to provide the exact tension required to close the carburetor butterfly valve when the throttle is released. A critical safety and performance component, this spring is designed to withstand millions of cycles without losing its rate. For Harley-Davidson motorcycles using Mikuni HSR carburetors, this spring ensures a crisp, predictable throttle feel and prevents the slide or butterfly from sticking open. Made from high-tensile spring steel, it is a direct replacement for the original factory equipment. This genuine Mikuni part is sold individually.