Adjust your primary chain without removing your footpeg or contorting your body into unnatural shapes. Our primary chain adjusting tool is made to perfectly fit the adjuster on your Triumph or BSA single-cylinder bike, twin cylinder Triumph (350, 500, 650, 750 cc), and Triumph or BSA triple (T150, T160, A75). A standard ratchet in conjunction with this tool allows easy adjustment of your vintage Triumph and BSA primary drive. This high-quality, proper fitting tool is made of steel and then CAD plated right here in Ohio, USA. A superior replacement for OEM # 60-2108, 61-7012, 60-0496, 60-3961