STM Slipper Clutch Honda CBR 1000 RR-R SC82 (2020-2026) FHN-S170

Born from decades of Italian racing heritage, the STM slipper clutch for the Honda CBR 1000 RR-R SC82 represents the pinnacle of clutch engineering — a precision-crafted assembly distinguished by its patented ball-ramp mechanism and a design philosophy refined on the world's most demanding circuits. Where the factory clutch compromises, this unit excels: controlling rear-wheel behaviour, reducing rotating mass, and giving the rider a confident, communicative clutch action from the first lap to the last.

Key Features

• Eliminates engine over-rev on aggressive downshifts, maintaining smooth, controlled deceleration through corners
• Actively suppresses rear-wheel hop and chatter, delivering improved traction and rear-end stability under braking
• Reduces the trigger impulse of a highside, significantly improving safety during track and spirited road use
• Enables controlled rear-wheel slides for cleaner corner entries and more intuitive handling balance
• Improved clutch engagement feel on corner exit, preventing the machine from tucking the front under closing throttle
• Diaphragm spring design eliminates pressure-plate judder, giving a progressive, flutter-free lever release
• Saves approximately 0.7–0.8 kg of rotating mass compared to the stock clutch, sharpening throttle response and overall performance
• Patented ball-ramp anti-hopping technology delivers precise, repeatable slipper action with no compromise to drive engagement

Design, Finish and Heritage

STM has been manufacturing slipper clutches in Italy since the early years of World Superbike, supplying factory and satellite teams across MotoGP, WSBK and national championships. That race-department DNA flows directly into every road and track unit the brand produces. The FHN-S170 is machined from high-grade aluminium billet, anodised to a finish that resists heat, oil and abrasion across sustained track sessions. Every component — from the ball-ramp assembly to the diaphragm spring — is manufactured and inspected in-house, ensuring the tolerances and surface quality that a high-revving litre-class machine demands. The result is a clutch that looks as purposeful as it performs, worthy of the CBR 1000 RR-R's race-replica status.

Performance on Road and Track

The Honda CBR 1000 RR-R SC82 is one of the most aggressive production motorcycles ever built, with engine braking characteristics that can unsettle the rear tyre on tight downshifts. The STM FHN-S170 addresses this directly: under deceleration the ball-ramp geometry allows the clutch to partially disengage, metering engine braking torque to a level the rear tyre can absorb without skipping or stepping out. Under acceleration the ramp re-engages with full clamping force, so drive is never compromised. The diaphragm spring further refines the feel at the lever, making slow-speed and pit-lane manoeuvres as smooth as they are on an open circuit blast.

Fitment and Compatibility

This clutch is engineered specifically for the Honda CBR 1000 RR-R SC82 covering model years 2020 through to 2026. No modifications to the engine casings are required. Always verify your exact build date and variant before installation, and follow the manufacturer's fitting instructions.

• Honda CBR 1000 RR-R SC82 (2020–2026)

Specifications