STM EVO GP Dry Clutch for BMW S1000RR K46 (2009-2018) – KTT-1300

Few components define a superbike's character as completely as its clutch, and the STM EVO GP dry clutch for the BMW S1000RR K46 (2009-2018) is the definitive upgrade for riders who demand race-bred precision. Engineered to replace the factory wet clutch entirely, this is a system shaped by STM's long pedigree in top-tier motorsport — refined in design, purposeful in finish, and immediate in the performance gains it delivers.

Key Features

• Replaces the standard wet clutch with a race-specification dry clutch, reducing power loss through the drivetrain and improving acceleration out of corners.
• Prevents engine over-rev on downshifts, keeping throttle response controlled and predictable at high speed.
• Reduces rear-wheel hop under braking, improving traction and stability in the most demanding conditions.
• Lowers the trigger impulse of a potential highside, adding a meaningful safety margin when riding at the limit.
• Enables controlled rear-wheel slides, giving experienced riders greater handling finesse on track.
• Patented ball-ramp mechanism governs the slipper function with exceptional precision, calibrated for high-rpm operation.
• Diaphragm spring design eliminates pressure-plate judder, delivering a cleaner, more tactile feel through the clutch lever during engagement and release.
• Weight saving of approximately 0.7–0.8 kg through a significant reduction in rotating mass, sharpening throttle response and overall performance of the S1000RR.

Design, Finish and Heritage

STM has built its reputation across decades of supplying dry clutch systems to privateer and factory race teams alike. The EVO GP represents the pinnacle of that heritage — a component that looks as purposeful as it performs. The precision-machined basket, covers and internals carry the unmistakable aesthetic of a true racing dry clutch, and the overall assembly reflects the same exacting standards demanded by the world's most competitive circuits. Installing the KTT-1300 is not merely a performance upgrade; it is a statement of intent about how the BMW S1000RR is ridden.

Performance and Control

The core advantage of a dry clutch over the factory wet unit lies in the direct connection it establishes between the engine and the gearbox. By eliminating the drag and parasitic losses inherent to an oil-bath clutch, the STM EVO GP allows more of the S1000RR's power to reach the rear wheel. The slipper function — controlled through STM's patented ball-ramp system — manages back-torque with a level of refinement that a standard slipper clutch cannot match, making the bike dramatically easier to manage mid-corner under hard braking. The improved clutch-closure control in corners also prevents the front end from tucking, a critical safety benefit on fast, flowing circuits.

Fitment and Compatibility

The STM EVO GP dry clutch KTT-1300 is designed specifically to fit the BMW S1000RR K46 produced between 2009 and 2018. It is a direct replacement for the OEM wet clutch assembly on all K46-generation S1000RR models across that production run.

Specifications

• Brand: STM
• Model: EVO GP Dry Clutch
• Part number: KTT-1300
• Type: Dry clutch (replaces OEM wet clutch)
• Fits: BMW S1000RR K46 (2009–2018)
• Weight saving: approximately 0.7–0.8 kg (reduction in rotating mass)
• Slipper mechanism: patented ball-ramp anti-hopping system
• Spring type: diaphragm spring pressure plate