Bonamici Racing Chain Tensioner with Brake Caliper Bracket Yamaha YZF-R9 (2025-2026) CHAD17P_BK - Black

On track, every detail of your drivetrain setup matters — and the Bonamici Racing CHAD17P_BK delivers the kind of micrometric chain tensioner precision and integrated brake caliper positioning that serious riders demand from their Yamaha YZF-R9. Engineered in Italy from solid high-strength aluminium and CNC-machined to exacting tolerances, this single component replaces the stock chain tensioner while simultaneously elevating rear brake consistency at the limit.

Key Features

• CNC-machined from solid high-strength aluminium for outstanding structural rigidity with minimal mass
• Micrometric adjustment scale enables exact, fully repeatable chain tension settings under all conditions
• Integrated brake caliper bracket combines two critical functions in one precision component, eliminating play and improving caliper position accuracy
• Precision bearings and slide guide units ensure smooth, friction-free adjustment beyond what standard mechanics allow
• Hard anodised black finish for a race-grade aesthetic and durable surface protection
• Direct plug-and-play fitment — no swingarm or brake system modification required

Track Performance Advantage

The CHAD17P_BK was developed with the race paddock in mind. On circuit, inconsistent chain tension translates directly into unpredictable power delivery and accelerated wear across the entire drivetrain. The micrometric scale on this tensioner eliminates guesswork: each adjustment is precise and reproduced identically each time the rear wheel is removed and refitted — essential discipline for race weekends with frequent tyre changes.

The integrated brake caliper bracket is where this component truly sets itself apart from a standard chain tensioner upgrade. By unifying chain tensioning and caliper mounting in a single rigid CNC-machined assembly, flex and positional deviation at the caliper are substantially reduced. The result is a firmer, more consistent brake lever feel and a more stable braking point when pushing hard into corners — exactly the margin that matters at track days and club racing events.

Build Quality & Finish

Every CHAD17P_BK is produced in Italy to Bonamici Racing's exacting manufacturing standards. The billet aluminium construction delivers the high strength-to-weight ratio demanded by competition use, while the hard anodised black finish protects the surface against heat, abrasion and corrosion across extended racing and road use. Integrated precision bearings contribute to smooth guide unit operation and a quality of adjustment that outlasts simpler tensioner designs significantly.

Installation Notes

• Plug-and-play replacement for the standard chain tensioner — no swingarm or brake system modification required
• Set chain tension with the rear wheel fully mounted before finalising adjustment
• Torque all fasteners to the manufacturer's specified values

Fitment & Compatibility

The Bonamici Racing CHAD17P_BK chain tensioner with brake caliper bracket is a direct fit for the following motorcycle:

• Yamaha YZF-R9 — model years 2025 and 2026

Specifications