K-Tech DDS Closed Cartridge Kit Yamaha YZF-R6 RJ27 (2017–2026) – Part No. 155-017-270-010

Trusted by British Superbike teams and proven at the Isle of Man TT, the K-Tech DDS Closed Cartridge Kit for the Yamaha YZF-R6 RJ27 (2017–2026) brings race-validated, safety-assured damping to your original fork. The patented Direct Damping System eliminates cavitation under extreme track conditions, delivering consistent, predictable feedback lap after lap — the kind of reliability that matters when you are carrying full corner speed.

Key Features

• Race-proven performance: homologated across British Superbike rounds and the Isle of Man TT, giving you confidence backed by the highest levels of motorcycle competition
• Patented DDS (Direct Damping System) design actively prevents cavitation, ensuring stable and repeatable damping regardless of load or temperature
• 30-way independently adjustable compression and rebound damping for precise, individualised setup
• 18 mm preload adjustment for fine, repeatable spring rate tuning without disturbing the damping circuit
• Asymmetric, independent damping circuits improve chassis dynamics and sharpen response times
• Increased stroke compared to the original cartridge, expanding the suspension's working range for both road and track use

Engineering Detail

At the heart of the kit is a 20 mm piston that increases oil flow through the 31 mm control valves, allowing the damping force to build smoothly and linearly rather than spiking under hard compression. The 8 mm piston rod minimises system offset, keeping the cartridge geometry true to the fork's original architecture. The pressurised closed-cartridge design maintains oil contact across the full stroke, eliminating the air entrainment that causes inconsistent damping in open-cartridge systems. The spring return force provides constant stability under varying load conditions, making the kit equally effective whether you are chasing a lap time or making rapid direction changes on a challenging road route.

Track Record & Intended Use

K-Tech designed this cartridge kit to work within the stock Yamaha fork tubes, making it a high-impact upgrade without requiring fork replacement. The asymmetric circuit architecture — where compression and rebound circuits operate independently — allows a suspension technician to dial in each characteristic separately, reducing compromise. This is the system of choice for teams where damping consistency under race conditions is a safety-critical requirement, not merely a performance preference. Installation by a K-Tech authorised service centre is strongly recommended; specialist tools and techniques are required to realise the full potential of the system safely.

Fitment & Compatibility

This kit fits the Yamaha YZF-R6 RJ27, model years 2017 to 2026. It is designed for use with the original Yamaha fork tubes — no fork replacement is required. Always verify your specific chassis variant before ordering.

Specifications

• Spring series: 36-260
• Inner diameter: 20 mm / 32 mm
• Outer diameter (piston rod): 8 mm
• Overall length: 693 mm
• Recommended compression clicks: 16
• Recommended rebound clicks: 18
• Recommended preload: 10 mm
• Compression / rebound adjustment range: 30 ways (each circuit)
• Preload adjustment range: 18 mm
• Part number: 155-017-270-010