MRG Mr Gasket Accelerator Return Spring Kit (MG9680G)THROTTLE RETURN SPRING KIT For King, Race, Speed & Road Demon Carburettors Part Number: MG9680G Designed for positive throttle return to assure added safety, this kit features a custom return spring bracket that is notched to provide adjustment for eight spring tension settings. The inner and outer return springs are Electro Lease nickel Plated to resist rust and extension fatigue.