Bonamici Racing Chain Adjuster Yamaha YZF-R9 (2025-2026) CHAD17

Keeping your chain tension dialled in precisely is one of the most straightforward ways to protect your drivetrain and maintain consistent power delivery — and the Bonamici Racing CHAD17 makes that task genuinely effortless on the Yamaha YZF-R9. Designed from the ground up for the 2025–2026 R9, this CNC-machined chain adjuster replaces the stock unit with a component that rewards you every time you touch it: smooth, micrometric adjustment, high-quality bearings, and a finish that suits the R9's sharp aesthetic.

Key Features

• CNC-machined from solid Ergal aluminium billet for a precise, high-strength result that keeps weight firmly in check
• Micrometric adjustment scale allows exact, fully repeatable chain tension settings — no guesswork, no drifting between sessions
• Integrated high-performance precision bearings deliver near-frictionless movement during adjustment, a significant step up from plain sliding systems
• Direct OEM replacement — bolts straight onto the Yamaha YZF-R9 swingarm with no machining or modification required
• Outer body finished in black; inner adjuster available in red, blue, gold, black, or silver to co-ordinate with your R9's colour scheme

Precision Where It Counts

The CHAD17's micrometric scale is the detail that sets it apart from budget alternatives. Each increment is clearly defined, so whether you are tensioning the chain after a wheel removal in the garage or making a quick tweak at a trackday, you can return to your preferred setting with complete confidence. The built-in precision bearings make the adjustment action smooth and controlled rather than stiff and imprecise — a small quality-of-life detail that pays dividends every service interval.

Built to Complement the YZF-R9

Bonamici Racing machines the CHAD17 from Ergal aluminium — the same high-tensile alloy favoured throughout motorsport for its excellent strength-to-weight ratio. The exterior wears a clean black finish that integrates naturally with the R9's aggressive bodywork, while the colour-selectable inner component lets you add a personal touch without clashing with the factory palette. The result is a component that looks as considered as everything else on a well-specced R9.

Installation

• Direct swap for the standard chain adjuster — no swingarm machining or fabrication needed
• Precision fit for Yamaha YZF-R9 model years 2025–2026
• No swingarm modification required
• Installable with standard workshop tools

Fitment and Compatibility

The Bonamici Racing CHAD17 chain adjuster is designed and manufactured exclusively for the following model:

• Yamaha YZF-R9 (2025–2026)

Specifications