Amazon.com: Kuryakyn 4619 Motorcycle Accessory: Tamper-Proof Helmet Security Lock, Universal Fit for Motorcycles with 1-1/4" to 1-1/2" Diameter Frame Tubes, Gloss Black : Automotive
Universal Mount Helmet Lock | Harley-Davidson USA
Bikers Choice Chrome Universal Helmet Lock - 74937S2 Dirt Bike Motorcycle Goldwing Snowmobile - Dennis Kirk
Lidlox Motorcycle Handlebar Helmet Lock for Harley Davidson