Öhlins FKR Cartridge Kit Racing TTX 25 FKR 126 – Yamaha YZF-R1 M RN65 (2020–2026)

Engineered from the ground up for the Yamaha YZF-R1 M RN65 (2020–2026), the Öhlins FKR Cartridge Kit Racing TTX 25 FKR 126 brings the same closed-cartridge architecture found in top-level circuit competition directly to your front forks. Every component reflects Öhlins' exacting material standards — from the precision-machined 8 mm piston rod to the spring-pressurised sealing system that eliminates pressure drop and guarantees repeatable, fade-free damping lap after lap.

Key Features

• Spring-pressurised closed cartridge system removes air ingress and pressure loss, ensuring a consistent damping curve across the full suspension stroke.
• TTX technology combined with a newly developed piston delivers immediate, linear response and eliminates the stick-slip behaviour that blunts corner entry feel.
• 8 mm piston rod construction provides the rigidity and surface finish precision required for accurate high-speed and low-speed damping adjustment.
• Three 04744-series fork springs (9.5, 10.0 and 10.5 N/mm) included, allowing precise spring-rate matching to rider weight and circuit demands without separate purchases.
• Designed exclusively for forks bearing the Öhlins fork codes FL 940, FL 942 and FL 943 — a direct, no-compromise upgrade path for the factory-specification R1 M suspension unit.
• Maintenance-friendly architecture means a trained Öhlins Service Centre can service, re-valve and rebuild the unit to as-new specification.

Build Quality and Materials

Where budget cartridge kits rely on cast or pressed components, the FKR 126 uses close-tolerance machined aluminium and hardened steel throughout its internals. The 8 mm piston rod is ground to the surface finish tolerances demanded by the TTX seal pack, ensuring consistent oil film behaviour from cold on the morning warm-up lap through to the final stint of an endurance race. The spring-pressurised closed system is a design philosophy Öhlins has refined across decades of MotoGP and World Superbike programmes: it removes the cavitation risk inherent in conventional open cartridges, which means the damping you set in the paddock is the damping you feel at the apex.

Performance and Track Use

The TTX 25 piston geometry is calibrated for the YZF-R1 M's electronically controlled chassis platform, complementing the factory IMU and semi-active electronics rather than fighting them. The linear damping characteristic means each click of adjustment produces a predictable, proportional change — an essential quality when dialling in setup during a short practice window. Improved traction and directional stability are the tangible results: the front end reports trail information clearly under hard braking and holds its line through long-radius corners where lesser units begin to vague out.

Fitment and Compatibility

The FKR 126 fits the Yamaha YZF-R1 M RN65 for model years 2020 through 2026. It is compatible only with forks carrying Öhlins fork designations FL 940, FL 942 or FL 943. This is a motorsport product and does not carry a parts certificate (Teilegutachten) for road use in Germany or any other jurisdiction — it is intended solely for closed-circuit competition. Installation by an authorised Öhlins Service Centre is strongly recommended to ensure correct set-up and to protect warranty coverage.

Specifications

• Part number: FKR 126
• Technology: TTX 25 closed cartridge
• Piston rod diameter: 8 mm
• Included springs (04744 series): 9.5 N/mm, 10.0 N/mm, 10.5 N/mm
• Compatible forks: Öhlins FL 940 / FL 942 / FL 943
• Fitment: Yamaha YZF-R1 M RN65, 2020–2026
• Use: track / closed-circuit competition only
• Installation manual: included