Universal Throttle complete with rubber grips.
They fit most models with 7/8" handlebars.
The grip can come off, but it will probably need to be cut.
This will void any returns.
Twin Pull Alloy Twistgrip/Throttle. Replica of Doherty #77.
Handlebar Diameter: 7/8".
It can be fitted to: Triumph and BSA. It could also fit your custom project.