Kawasaki Ninja 300 / 300 ABS Billet Adjustable Preload Fork Adjusters Adjustors Kawasaki Ninja 300 CNC Billet Preload Adjusters Made from 100% 6061 T-6 Aluminum and finished with Anodize Coating Improves handling dramatically and allows for quick adjustments Allowed adjustments with aftermarket clip-ons: start with 5mm preload and up to 20mm preload. Allowed adjustments with stock handlebars: start with 15mm preload and up to 20mm preload. Comes with (2) Preload Adjusters (1) Installation Manual. (reuses the stock O-ring) Easy installation and can be done under ten minutes - no fork oil draining at all.