It replaced your tach drive and secures using your existing hardware

These bayonet style gas caps (also known as cam gas caps) are vented and are chromed steel

Stainless steel

and LCFabrications has designed a solution

Machined from 6061 aluminum and given a factory matched matte black powder coat

Universal Chrome Lucas Style Handlebar Mounted Dimmer Switch and Horn Button Brand_Amal Carburetor It replaced your tach driveThis universal dimmer switch and horn button is ideal for use on your handlebars to keep your kit clean. This is a reproduction Lucas style switch, it is perfectly at home on a vintage Triumph or BSA as well as on any Harley Davidson, stock, bobber or chopper. Great for cleaning up your stock horn and hi low operation controls. Fits 1" handlebars. Note: There are no returns on carburetors, electrical items, full frames, hardtails or made to order