{"product_id":"stm-fya-s120","title":"STM Slipper Clutch for Yamaha YZF-R1 (2007-2008) – FYA-S120","description":"\u003cp\u003eWhether you're threading through weekend mountain roads or pushing hard on track days, the STM slipper clutch for the Yamaha YZF-R1 (2007-2008) delivers a level of rear-wheel composure and clutch feel that the standard unit simply cannot match. Part number FYA-S120, it is a direct, practical upgrade that pays dividends every time you brake hard into a corner.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePrevents engine over-rev on aggressive downshifts, keeping the rear wheel settled and the chassis stable under hard braking\u003c\/li\u003e\n\u003cli\u003eReduces rear-wheel hop and chatter, improving traction and confidence through the corner entry phase\u003c\/li\u003e\n\u003cli\u003eLowers the trigger impulse for highsider incidents, adding a meaningful safety margin during fast, committed riding\u003c\/li\u003e\n\u003cli\u003eAllows controlled rear-wheel slide for a more fluid, adjustable cornering style\u003c\/li\u003e\n\u003cli\u003eImproved clutch engagement feel in corners — the diaphragm spring eliminates pressure-plate judder for a smoother, more progressive release\u003c\/li\u003e\n\u003cli\u003eWeight saving of approximately 0.7–0.8 kg through reduced rotating mass, sharpening throttle response and overall performance on the YZF-R1\u003c\/li\u003e\n\u003cli\u003ePatented ball-ramp mechanism governs the slipper function with precision at high engine speeds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eEngineering and Build Quality\u003c\/h2\u003e\u003cp\u003eSTM is one of the most respected names in aftermarket clutch technology, with decades of racing pedigree feeding directly into their road and track product range. The FYA-S120 is engineered to OEM fitment standards, meaning installation is straightforward and no additional modifications to the clutch basket or actuation system are required. The patented ball-ramp design is the heart of the system: under deceleration, the ramps allow the clutch to partially disengage proportionally to the degree of engine braking, preventing the rear tyre from locking or hopping without removing drive entirely. When you open the throttle again, the ramps re-engage the clutch smoothly and instantly.\u003c\/p\u003e\u003cp\u003eThe diaphragm spring replaces the conventional coil-spring stack, eliminating the plate flutter that causes the harsh, inconsistent feel many riders notice in the standard clutch at high rpm. The result is a lever pull that is lighter, more progressive, and far easier to modulate — a benefit that is just as noticeable on a spirited road ride as it is on circuit.\u003c\/p\u003e\u003ch2\u003eEveryday Usability and Real-World Value\u003c\/h2\u003e\u003cp\u003eIt is easy to assume a slipper clutch is only relevant if you are chasing lap times. In practice, the FYA-S120 earns its keep every ride. Stop-start traffic, aggressive overtakes with rapid gear changes, and unfamiliar roads where braking points are uncertain — all of these scenarios become less stressful when the rear wheel is no longer a variable you need to manage consciously. The weight reduction also has a perceptible effect on the engine's willingness to rev, making the YZF-R1 feel lighter and more responsive without any other modification.\u003c\/p\u003e\u003ch2\u003eFitment and Compatibility\u003c\/h2\u003e\u003cp\u003eThis clutch is a precise fit for the following model:\u003c\/p\u003e\u003cul\u003e\u003cli\u003eYamaha YZF-R1 — model years 2007 and 2008\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eAlways confirm your frame and engine number against the fitment data before ordering if your machine has been modified or has a non-standard engine specification.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSTM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003ctd\u003eFYA-S120\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eSlipper clutch (anti-hopping clutch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFitment\u003c\/th\u003e\n\u003ctd\u003eYamaha YZF-R1 (2007–2008)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSlipper Mechanism\u003c\/th\u003e\n\u003ctd\u003ePatented ball-ramp system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpring Type\u003c\/th\u003e\n\u003ctd\u003eDiaphragm spring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight Saving\u003c\/th\u003e\n\u003ctd\u003eApprox. 0.7–0.8 kg (reduced rotating mass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCategory\u003c\/th\u003e\n\u003ctd\u003eEngine and clutch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"STM","offers":[{"title":"Default Title","offer_id":53168706781450,"sku":"FYA-S120","price":1028.05,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/FDU-S050_93100b4d-8b13-4b87-85a2-5e8ac78aa5a7.png?v=1780811783","url":"https:\/\/inter-pace.com\/products\/stm-fya-s120","provider":"Inter-Pace","version":"1.0","type":"link"}