Twin Power Lever Action Starter Solenoid Features: Fits Big Twin 4 speed 1965-86 Made from CNC billet aluminum and assembled with the highest quality components for long life Replaces OE starter solenoid which are notorious for having starter problems Just pull the lever to start your motorcycle Requires Starter Relay 03-025 for installation, in addition to Starter Relay Mc-Str1 (each sold separately)