{"product_id":"sitta-aluminium-rear-sprocket-kawasaki-zx-6r-636-rr-201w-37-47-520","title":"Sitta Aluminium Rear Sprocket Kawasaki ZX-6R\/636\/RR (2007-2026) 201W – 37-47 Teeth, 520 Pitch","description":"\u003cp\u003eEngineered for riders who demand precision and durability in equal measure, the Sitta 201W aluminium rear sprocket is purpose-built for the Kawasaki ZX-6R, ZX-636, and ZX-6RR (2007–2026). Manufactured from high-grade aluminium and available in eleven tooth counts from 37 to 47, this sprocket lets you dial in your gearing with confidence — whether you're chasing lap times or maximising road performance.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHigh-grade aluminium construction delivering exceptional strength at just 350 g (size 45), reducing unsprung and rotating mass for sharper throttle response.\u003c\/li\u003e\n\u003cli\u003e520 pitch specification, optimised for performance and racing applications on the ZX-6R platform.\u003c\/li\u003e\n\u003cli\u003eEleven tooth options (37 to 47) for precise gearing adjustment to suit track days, circuit racing, or spirited road riding.\u003c\/li\u003e\n\u003cli\u003eSprocket carrier fitment: 80\/104-6 hole pattern ensures accurate, trouble-free installation with no modification required.\u003c\/li\u003e\n\u003cli\u003eEight finish options — including hard-anodised, which outlasts standard anodising under sustained high-load conditions — as well as black, silver, orange, blue, gold, red, and green.\u003c\/li\u003e\n\u003cli\u003ePrecision CNC machining for consistent tooth profile, minimising chain wear and maximising drivetrain efficiency.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eGearing — Choosing the Right Tooth Count\u003c\/h2\u003e\u003cp\u003eSelecting the correct rear sprocket tooth count has a direct and measurable effect on how your Kawasaki ZX-6R performs. Understanding the trade-offs helps you make the right call for your riding style and circuit profile.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFewer teeth (37–42): produces a taller overall gear ratio, raising top speed and reducing engine revs at sustained high speeds — ideal for long straights and fast flowing circuits.\u003c\/li\u003e\n\u003cli\u003eMore teeth (43–47): produces a shorter overall gear ratio, sharpening acceleration and improving mid-corner drive — the go-to choice for tight, technical tracks or punchy road riding.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe Sitta 201W gives you the full spectrum of that adjustment in a single, consistent product line, so you can fine-tune your ZX-6R's drivetrain without compromising on quality.\u003c\/p\u003e\u003ch2\u003eConstruction and Finish\u003c\/h2\u003e\u003cp\u003eThe 201W is CNC-machined from high-quality aluminium alloy, combining a low rotating weight with the structural rigidity needed to handle the power delivery of the ZX-6R's inline-four. The hard-anodised finish option is particularly notable: the hard-anodising process penetrates deeper into the aluminium surface than standard anodising, producing a significantly harder outer layer that resists abrasion and corrosion far more effectively during prolonged use. The remaining seven colour finishes — black, silver, orange, blue, gold, red, and green — are standard anodised and offer a clean, durable appearance suited to road and occasional track use.\u003c\/p\u003e\u003ch2\u003eFitment and Compatibility\u003c\/h2\u003e\u003cp\u003eThe Sitta 201W rear sprocket is compatible with the following models:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eKawasaki ZX-6R Ninja — model years 2007 to 2026\u003c\/li\u003e\n\u003cli\u003eKawasaki ZX-636 Ninja — model years 2007 to 2026\u003c\/li\u003e\n\u003cli\u003eKawasaki ZX-6RR Ninja — model years 2007 to 2026\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eSprocket carrier specification: 80\/104-6 hole pattern. Chain pitch: 520 only. Verify your existing chain pitch before ordering.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSitta\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart number\u003c\/td\u003e\n\u003ctd\u003e201W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eapprox. 350 g (size 45)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChain pitch\u003c\/td\u003e\n\u003ctd\u003e520\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable teeth\u003c\/td\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\u003ctd\u003eSprocket carrier\u003c\/td\u003e\n\u003ctd\u003e80\/104-6 hole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eKawasaki ZX-6R \/ ZX-636 \/ ZX-6RR (2007–2026)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable finishes\u003c\/td\u003e\n\u003ctd\u003eSilver, Black, Hard-anodised, Green, Red, Blue, Orange, Gold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Sitta","offers":[{"title":"37 \/520 \/ Silver","offer_id":53167926870282,"sku":"si201W37si520","price":80000.0,"currency_code":"KRW","in_stock":true},{"title":"37 \/520 \/ Black","offer_id":53167926903050,"sku":"si201W37sw520","price":103000.0,"currency_code":"KRW","in_stock":true},{"title":"37 \/520 \/ Hard-anodised","offer_id":53167926935818,"sku":"si201W37od520","price":103000.0,"currency_code":"KRW","in_stock":true},{"title":"37 \/520 \/ 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