Rizoma universal 22mm handlebars. Click the resources tab to download a pdf file with measurements and other information for this handlebar. This bar is 22mm where the controls mount and 22mm where it clamps to the top triple clamp.
Please note that Rizoma handlebars are not pre-drilled for your OEM controls. You will have to either drill the bar or remove the mounting pins on the controls. A very easy task.