NOTE: This is a special order product from Bonamici Racing with a 30-45 day lead time.

This new Racing Chain Adjuster has been developed exclusively for track use and designed for Yamaha YZF-R9 bikes using the Yamaha MT-09 swingarm conversion.

This solution was developed to meet the needs of teams and riders using the longer M-09 swingarm configuration (allowed under specific racing regulation exemptions) to improve the bike’s on-track performance.

Main technical features

Specifically designed for the MT-09 swingarm geometry
Special quick-removal axle system developed for racing use
Axle CNC-machined from solid 39NiCrMo3 steel
Internal hole lapping process for maximum precision
Phosphating surface treatment
M24x1.5 thread
Recessed hex socket on the axle head for quick tightening/removal using an Allen key insert
Left side designed for axle insertion
Right side adjuster featuring M24x1.5 threading, allowing direct axle fastening without the use of a nut
Right side equipped with dedicated support for the Yamaha YZF-R9 rear brake caliper
Compatible exclusively with original Yamaha YZF-R9 rear brake calipers

Bike Fitment:

Yamaha YZF R9 2025-