Graves Motorsports Rear Axle Alignment Tool for the 2023 ZX-4RR + Ninja 400 + Ninja 500 + Yamaha R3. The Rear Axle Alignment Tool is made from ultra-durable Delrin and is used to push your rear axle out and hold your rear brake caliper mount in place while your rear wheel is removed. This tool also makes installing your rear wheel and axle much easier. This tool is used by Team Graves Yamaha. This product is Manufactured in the U.S.A.. Without this tool changing the rear wheel is a hassle and time consuming. Fitment:Kawasaki Ninja 500 2024 + ZX-4RR 2023 + Kawasaki Ninja 400 2018-2023 + Yamaha R3 2015-2023 +(Also fits Z400 + Z500 models 2018 +)