I have used this tool successfully for many years on most early 2000 Suzukis. All the way up to 05 06 on some models. It may work on some newer models as well. This Yoshimura R-421 Fuel Injection Adjuster Box is a must-have for any serious biker. The high-quality product is designed to offer top performance and reliability in enhancing the fuel injection system of your bike. The item is compatible with popular models including GSXR 1300, 600, 750, and 1000. Crafted by one of the leading brands, Yoshimura, this adjuster box promises to provide you with long-lasting performance and uninterrupted biking experience. It is built to last and enhance the overall performance of your bike. Get this high-performance adjuster box today and take your biking experience to the next level.