I decided to install a Supersprox Stealth (lightweight) sprocket. In combination with a Pro Bolt axle nut. In the video you can follow the process and measurements. I also reset the chain adding some welcome tips setting up the rear wheel alignment.
Supersprox: https://www.supersprox.com/
Front sprocket cover: https://www.worldoftriumph.com/pages/parts-search?blockid=100063514-4-2&modelid=560602&modelname=TIGER%20Sport%20Upto%20VIN:%20570058&quantity=1721150872097
Chain adjuster: https://www.sportsbikeshop.co.uk/motorcycle_parts/content_prod/446671