{"product_id":"stm-fya-s170","title":"STM Slipper Clutch Yamaha YZF-R1\/M RN32, RN49 \u0026 RN65 (2015-2026) FYA-S170","description":"\u003cp\u003eEngineered from the ground up for the demands of track and high-performance road riding, the STM slipper clutch for the Yamaha YZF-R1\/M (RN32, RN49 \u0026amp; RN65, 2015-2026) is a precision Italian component that fundamentally transforms clutch behaviour under hard braking and aggressive downshifts. Where the stock unit can allow the rear wheel to hop and the engine to over-rev on corner entry, the STM unit draws on patented ball-ramp technology and a diaphragm spring pressure plate to restore composure and put the rider firmly in control.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePatented ball-ramp mechanism precisely governs the anti-hopping function, maintaining clutch engagement consistency at high rpm without the harshness associated with conventional ramp systems.\u003c\/li\u003e\n\u003cli\u003eDiaphragm spring pressure plate eliminates pressure-plate wobble and delivers a smoother, more progressive feel as the clutch lever is released — a tangible improvement over the OEM setup.\u003c\/li\u003e\n\u003cli\u003ePrevents rear-wheel hop on aggressive downshifts, substantially improving traction and stability on corner entry.\u003c\/li\u003e\n\u003cli\u003eReduces highsider trigger impulse at speed, adding a meaningful safety margin during late, hard braking.\u003c\/li\u003e\n\u003cli\u003eAllows controlled rear-wheel slides, enabling the rider to exploit the YZF-R1\/M's power with greater confidence in the sportier portion of the rev range.\u003c\/li\u003e\n\u003cli\u003eSignificant rotating mass reduction of approximately 0.7–0.8 kg over the stock clutch assembly, contributing to sharper engine response and faster revving.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eBuild Quality \u0026amp; Materials\u003c\/h2\u003e\u003cp\u003eSTM is an Italian manufacturer with decades of motorsport heritage, supplying clutch systems to World Superbike and Moto2 teams. Every component in the FYA-S170 kit reflects that pedigree: close-tolerance machined aluminium basket and hub, hardened ramp surfaces, and springs rated for sustained track-day abuse. The construction is designed not merely to function, but to remain consistent lap after lap — something the OEM clutch cannot guarantee under repeated aggressive use.\u003c\/p\u003e\u003ch2\u003eOn Track and On Road\u003c\/h2\u003e\u003cp\u003eFor riders pushing their YZF-R1 or R1M hard at the circuit, the benefits are immediately apparent. The rear wheel no longer skips unpredictably under trail braking, the engine reacts cleanly to blipped downshifts, and the closing phase of the clutch in corners is far more manageable — preventing the front-end dive that can unsettle the chassis at the worst possible moment. On road, the same qualities translate to greater confidence in unexpected situations where rapid downshifting is unavoidable.\u003c\/p\u003e\u003ch2\u003eFitment \u0026amp; Compatibility\u003c\/h2\u003e\u003cp\u003eThe STM FYA-S170 is a direct fitment for the following Yamaha models:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eYamaha YZF-R1 RN32 (2015–2016)\u003c\/li\u003e\n\u003cli\u003eYamaha YZF-R1M RN32 (2015–2016)\u003c\/li\u003e\n\u003cli\u003eYamaha YZF-R1 RN49 (2017–2019)\u003c\/li\u003e\n\u003cli\u003eYamaha YZF-R1M RN49 (2017–2019)\u003c\/li\u003e\n\u003cli\u003eYamaha YZF-R1 RN65 (2020–2026)\u003c\/li\u003e\n\u003cli\u003eYamaha YZF-R1M RN65 (2020–2026)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrand: STM\u003c\/li\u003e\n\u003cli\u003ePart number: FYA-S170\u003c\/li\u003e\n\u003cli\u003eType: Slipper clutch (anti-hopping clutch)\u003c\/li\u003e\n\u003cli\u003eFitment: Yamaha YZF-R1\/M RN32, RN49 \u0026amp; RN65 (2015–2026)\u003c\/li\u003e\n\u003cli\u003eAnti-hopping mechanism: Patented ball-ramp system\u003c\/li\u003e\n\u003cli\u003ePressure plate: Diaphragm spring design\u003c\/li\u003e\n\u003cli\u003eWeight saving: approximately 0.7–0.8 kg versus OEM rotating assembly\u003c\/li\u003e\n\u003cli\u003eIntended use: Track and high-performance road riding\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STM","offers":[{"title":"Default Title","offer_id":53168706879754,"sku":"FYA-S170","price":1028.05,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/FDU-S050_435fc7bc-1ef9-4f66-896e-92319c2188e7.png?v=1780811783","url":"https:\/\/inter-pace.com\/products\/stm-fya-s170","provider":"Inter-Pace","version":"1.0","type":"link"}