STM EVO SBK Dry Clutch – Aprilia RSV4 / RF / RR / 1100 Factory (2015–2026) KTT-3600

For Aprilia RSV4 riders who want meaningful performance gains without chasing exotic track-only hardware, the STM EVO SBK dry clutch KTT-3600 is one of the most practical upgrades you can make. It replaces the standard wet clutch with a proven dry-clutch system that reduces power loss, sharpens engine response and gives you a noticeably better feel every time you roll onto the throttle or brake into a corner — on the road or on circuit.

Key Features

• Reduced power loss compared to the OEM wet clutch, putting more of the engine's output to the rear wheel on every ride.
• Prevents engine over-rev on downshifts, keeping the drivetrain stable during aggressive trail-braking and fast gear changes.
• Minimises rear-wheel hop under hard deceleration and allows controlled sliding — a clear advantage both on track and in spirited road use.
• Weight saving of approximately 0.7–0.8 kg through a reduction in rotating mass, improving throttle response and reducing inertia.
• Patented ball-ramp mechanism governs the anti-hopping function for precise, progressive clutch control at high engine speeds.
• Improved corner-entry behaviour during clutch engagement: the system actively resists front-end dive, giving a more planted, confident feel.
• Diaphragm spring design prevents pressure-plate flutter, delivering a smooth, consistent lever release with no chatter at the handlebar.

Engineering Detail

The EVO SBK is STM's road-and-track dry clutch, developed directly from their Superbike racing programme. At the heart of the system are STM's patented ball ramps, which self-regulate back-torque limiting without requiring manual adjustment. The diaphragm spring replaces the conventional coil-spring stack, eliminating the mechanical instability that causes pressure-plate judder — something riders notice immediately as a cleaner, more linear lever feel from engagement to full release.

The reduction in rotating mass is achieved by moving away from the oil-bath architecture of the original wet clutch. Less spinning mass means the engine revs more freely, responds faster to throttle inputs and is easier to control at the limit. For riders who regularly use their RSV4 on both public roads and track days, this translates into a more usable, communicative clutch in every riding scenario, not just at maximum attack.

Fitment & Compatibility

The STM EVO SBK dry clutch KTT-3600 is a direct-replacement conversion kit designed specifically for the following models:

• Aprilia RSV4 (2015–2026)
• Aprilia RSV4 RF (2015–2026)
• Aprilia RSV4 RR (2015–2026)
• Aprilia RSV4 1100 Factory (2015–2026)

This kit replaces the complete OEM wet-clutch assembly. Professional installation is recommended. Always verify compatibility with your specific model year before ordering.

Specifications

• Brand: STM
• Model: EVO SBK dry clutch
• Part number: KTT-3600
• Clutch type: Dry clutch conversion
• Weight saving: approx. 0.7–0.8 kg (reduction in rotating mass)
• Anti-hopping: Yes — patented ball-ramp mechanism
• Pressure plate: Diaphragm spring design
• Fitment: Aprilia RSV4 / RF / RR / 1100 Factory (2015–2026)