STM Anti-Hopping Slipper Clutch SBK Racing Full – Yamaha YZF-R1/M RN65 (2020-2026) FYA-R170

Long sessions at the track or demanding back-road days demand a clutch that never lets fatigue or mechanical stress become the enemy of control. The STM SBK Racing Full Street Wet Slipper Clutch FYA-R170 is STM's flagship anti-hopping unit for the Yamaha YZF-R1 and R1M (RN65, 2020–2026), combining a complete basket assembly with a full disc set to deliver all-day consistency, effortless lever action, and the kind of predictable, planted feel that lets you focus entirely on the ride.

Key Features

• Reduced rear-wheel hop under hard engine braking for composed, confident corner entries
• Smoother, more precise gear changes even at peak revs — lever pull feels lighter lap after lap
• Outstanding thermal stability under sustained high-load conditions, resisting fade during extended track sessions
• Optimised power transfer perfectly matched to the R1's aggressive power delivery and electronics suite
• Ultra-robust construction engineered for long service life in both race and demanding road use
• Complete kit: basket assembly and disc set included — a true drop-in racing upgrade

Built to Race, Refined for the Road

STM has supplied slipper clutch technology to professional racing programmes for years, and the SBK Racing Full line represents the direct transfer of that knowledge into a road-legal package. The FYA-R170 is the top-tier item in the STM catalogue for the R1 platform — chosen when standard or entry-level slipper units simply are not enough. Whether you are chasing lap times on a track day, competing in club racing, or pressing hard on a mountain pass, the engagement feel remains consistent and the lever effort stays low, making throttle-off transitions far less tiring than with the OEM clutch.

All-Day Comfort and Rider Confidence

One of the most overlooked benefits of a quality slipper clutch is how much it reduces physical and mental fatigue. By removing the jarring, destabilising effect of rear-wheel hop during downshifts, the FYA-R170 lets you brake later and with greater confidence, knowing the chassis will remain settled. That predictability translates directly into a more comfortable, composed ride across every session — whether it is your first lap or your fiftieth.

Important Notice — Mandatory Requirement from STM

As stated in the official STM parts catalogue: the original clutch basket must be sent to STM prior to fitting. This is required so that STM can correctly transfer the primary drive gear to the new assembly. Please ensure you factor this into your installation planning before ordering.

Fitment & Compatibility

• Yamaha YZF-R1 RN65 (2020–2026)
• Yamaha YZF-R1M RN65 (2020–2026)

Specifications