Best Family Hotels in Majorca for Holidays with Kids in 2024 Evotech Rear Spindle Bobbins Kawasaki ZX6R (2019 2021). Features of EP Rear Spindle Bobbins for the Kawasaki ZX6R Mounts through rear wheel spindle Durable nylon slider heads with an aluminium core Stainless steel spindle rod and all required fittings included Can protect rear brake discs and expensive swing arm Evotech Performance manufacture using the best quality materials Individual replacement bobbins can be purchased separately What is Spindle Bobbin Crash Protection? EP Rear Spindle Bobbins for the Kawasaki ZX6R offer crash protection to both sides of the swing arm. Nylon bobbin heads, sitting over an aluminium core, protrude from the motorcycle's swing arm to help absorb initial impact in any crash. The inventive design allows the slider to rotate to decrease stress on the machine. Fitted via the rear wheel spindle using a rolled thread spindle rod.