Mastering the Art of Colorful Blooms: Designing Gardens with Perennials Evotech Front Spindle Bobbins Kawasaki ZX6R (2019 2021). Key Features of EP Front Spindle Bobbins for Kawasaki ZX6R Nylon bobbin head, aluminium spacer and spindle rod plus all other fasteners included Mounts via the front wheel spindle Manufactured from high performance engineering materials Replacement bobbin heads can be purchased separately What is Spindle Bobbins Crash Protection? EP's innovative design brings protection to the front wheel and lower forks of the ZX6R with Front Spindle Bobbins. A durable nylon bobbin sits atop an aluminium spacer on either side of your front wheel fixed in place by a stainless steel spindle rod. The nylon slider and aluminium inner should receive any unexpected impact before the machine. The nylon header is designed to rotate on impact to decrease tension and stress on your motorcycle.