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STM Slipper Clutch Kawasaki ZX-6R / 636 / ZX-6RR (2019-2026) FKW-S130

€1.028,05 €1.181,67

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  • 14-day returns — in stock ships within 24h
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We ship with DHL and FedEx — express on request. If an item is in stock, express delivery can often go out within 1 business day. Standard delivery takes about 2–5 business days domestically and usually around a week worldwide. Please check the available shipping options and delivery times in your cart, as we offer several carriers depending on the country.

Returns must be registered in advance by email and are possible in line with our cancellation policy (14-day return request + 14-day return window after approval). Please note: unregistered returns are not accepted. You'll find all details on conditions, exceptions and refunds in our cancellation policy.

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For riders who push the Kawasaki ZX-6R hard into late-braking zones, the risk of a rear-wheel hop or highsider on a missed downshift is never far away. The STM slipper clutch for the ZX-6R / 636 / ZX-6RR (2019-2026), part number FKW-S130, is engineered to eliminate exactly that risk — bringing certified race-grade safety and measurable performance gains to both track days and spirited road riding.

Key Features

  • Prevents engine over-rev on downshifts, keeping the rear wheel planted and the chassis stable under hard braking
  • Reduces highsider trigger impulse significantly, lowering the risk of a violent crash at high speed — the primary safety case for fitting a slipper clutch
  • Patented ball-ramp mechanism governs the anti-hopping function with precision, optimising drive control at high rpm
  • Diaphragm spring eliminates pressure-plate wobble, delivering a cleaner, more progressive clutch-lever release feel
  • Controlled rear-wheel slide capability for improved corner-entry handling and confidence on track
  • Better clutch-closing management through bends prevents the front end from tucking under power pick-up
  • Approximately 0.7–0.8 kg weight saving through reduced rotating mass, sharpening throttle response and overall performance of the ZX-6R / 636 / ZX-6RR

Safety and Engineering Rationale

A conventional clutch transmits full engine braking torque directly to the rear tyre during aggressive downshifts. When tyre grip cannot match that torque spike, the rear wheel locks and rebounds — the classic highsider mechanism. STM's ball-ramp slipper system interrupts this cycle by allowing the clutch to partially disengage whenever back-torque exceeds a calibrated threshold. The result is a controlled, graduated transfer of engine braking rather than an abrupt shock load, keeping the chassis settled and the rider in command.

The diaphragm spring design is equally important: it removes the oscillation that standard pressure plates develop at high rpm, giving the lever a consistent, feedback-rich action that makes smooth, fast downshifts more repeatable lap after lap.

Performance Gains

Beyond pure safety, the STM FKW-S130 delivers tangible lap-time benefits for the ZX-6R platform. Shedding approximately 0.7–0.8 kg from the rotating assembly reduces the gyroscopic inertia of the drivetrain, which translates into lighter, more responsive steering and quicker rpm build. The ability to trail-brake deeper and downshift later — with confidence — allows riders to carry greater corner-entry speed without gambling on rear grip.

Fitment and Compatibility

This slipper clutch is a direct-fit replacement for the following Kawasaki models:

  • Kawasaki ZX-6R — model years 2019 to 2026
  • Kawasaki ZX-6 636 — model years 2019 to 2026
  • Kawasaki ZX-6RR — model years 2019 to 2026

Specifications

  • Brand: STM
  • Part number: FKW-S130
  • Type: Slipper clutch (anti-hopping clutch)
  • Anti-hopping mechanism: Patented ball-ramp system
  • Weight saving: approximately 0.7–0.8 kg vs. OEM assembly
  • Fitment: Kawasaki ZX-6R / ZX-6 636 / ZX-6RR (2019–2026)
  • Intended use: Road and track
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