{"product_id":"sitta-201w-525","title":"Sitta Aluminium Rear Sprocket Kawasaki ZX-10R\/RR Ninja (2004-2026) 201W – 37-47 Teeth, 525 Pitch","description":"\u003cp\u003ePrecision-engineered in premium aluminium and offered in eight distinctive finishes, the Sitta 201W rear sprocket brings genuine German manufacturing heritage to the drivetrain of the Kawasaki ZX-10R and ZX-10RR Ninja. Whether you are chasing lap times or refining your road setup, the 201W lets you dial in exactly the gearing character your riding demands — across eleven tooth options from 37 to 47, all in 525 pitch.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMachined from high-grade aluminium for an outstanding strength-to-weight ratio without compromise to durability.\u003c\/li\u003e\n\u003cli\u003eAvailable in eight colour options — silver, black, hard-anodised, green, red, blue, orange, and gold — so the sprocket complements your ZX-10R's livery as well as it performs.\u003c\/li\u003e\n\u003cli\u003eHard-anodised finish offers a significantly harder surface layer than standard anodising, resisting wear and corrosion under sustained high-load use.\u003c\/li\u003e\n\u003cli\u003eEleven tooth counts from 37 to 47 allow precise gearing adjustment for track day acceleration, high-speed road touring, or anything between.\u003c\/li\u003e\n\u003cli\u003eDedicated 525 pitch specification, optimised for the loads and chain standards of the ZX-10R\/RR platform.\u003c\/li\u003e\n\u003cli\u003eSprocket carrier interface: 80\/104 – 6 bolt pattern ensures an exact, rattle-free fit and straightforward installation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFinish, Design and Heritage\u003c\/h2\u003e\u003cp\u003eSitta has been producing drivetrain components for performance motorcycles for decades, and the 201W reflects that lineage in every detail. The colour range is far wider than most aftermarket alternatives — not merely a cosmetic gesture, but a reflection of Sitta's commitment to precision anodising processes that are integral to the part's surface hardness and corrosion resistance. The hard-anodised variant in particular undergoes a more intensive electrochemical treatment, producing a surface that outlasts conventionally anodised aluminium under the heat and abrasion cycles typical of track use. Whichever colour you select, the finish is uniform and deep, not a thin coat applied after the fact.\u003c\/p\u003e\u003cp\u003eThe machined tooth profile is consistent across the full range of tooth counts, maintaining the same engagement geometry whether you run a 37-tooth setup for maximum top speed or push to 47 teeth for sharper corner-exit drive. This consistency is characteristic of a manufacturer that tools every variant from the same design philosophy rather than treating fringe sizes as afterthoughts.\u003c\/p\u003e\u003ch2\u003eUnderstanding Gearing Choice on the ZX-10R\u003c\/h2\u003e\u003cp\u003eSelecting the correct tooth count fundamentally changes the character of the ZX-10R's power delivery. A smaller rear sprocket in the 37-to-42 tooth range lowers overall gearing, raising top speed and reducing engine revs at motorway speeds — ideal for long circuit straights or fast road riding. Moving to the 43-to-47 tooth range raises overall gearing, sharpening acceleration out of slow corners and making the bike feel more responsive in traffic or on tight technical circuits. The 201W's breadth of choice means a single part number covers every realistic scenario for this platform without compromise.\u003c\/p\u003e\u003ch2\u003eFitment and Compatibility\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eKawasaki ZX-10R Ninja — model years 2004 to 2026\u003c\/li\u003e\n\u003cli\u003eKawasaki ZX-10RR Ninja — model years 2017 to 2026\u003c\/li\u003e\n\u003cli\u003e525 pitch chains only — confirm your chain specification before ordering\u003c\/li\u003e\n\u003cli\u003eSprocket carrier: 80\/104 – 6 bolt pattern\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSitta\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003ctd\u003e201W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eChain Pitch\u003c\/th\u003e\n\u003ctd\u003e525\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Tooth Counts\u003c\/th\u003e\n\u003ctd\u003e37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSprocket Carrier Pattern\u003c\/th\u003e\n\u003ctd\u003e80\/104 – 6 bolt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Colours\u003c\/th\u003e\n\u003ctd\u003eSilver, Black, Hard-anodised, Green, Red, Blue, Orange, Gold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFitment\u003c\/th\u003e\n\u003ctd\u003eKawasaki ZX-10R Ninja (2004–2026), ZX-10RR Ninja (2017–2026)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Sitta","offers":[{"title":"37 \/525 \/ Silver","offer_id":53167920742666,"sku":"si201W37si525","price":56.6,"currency_code":"EUR","in_stock":true},{"title":"37 \/525 \/ 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