4 Evotech Performance Spindle Bobbins Kit Kawasaki Z900RS Cafe (2018 2020). Features of EP Spindle Bobbins Kit for the Kawasaki Z900RS Cafe Kit includes protection for front and rear wheels of your Kawasaki Nylon bobbin outer with strengthening aluminium inner Installed through the wheel spindle by stainless steel spindle rod Simple installation Extra bobbin heads are available to purchase Innovative design by Evotech Performance using the highest quality materials What is Spindle Bobbins Crash Protection? Precision designed to fit the sides of each wheel, EP Spindle Bobbins Kit for the Kawasaki Z900RS Cafe offers protection to the wheel spindles, lower front forks, brake calipers and rear swingarm. Effortlessly installed, the black bobbins are held in place by a rolled thread spindle rod. The durable materials of injection moulded nylon and aluminium are anticipated to be first to take impact should an incident occur, cutting costly damage to the motorcycle.