{"product_id":"sitta-aluminium-rear-sprocket-suzuki-gsx-r-1000-201z","title":"Sitta Aluminium Rear Sprocket Suzuki GSX-R 1000 (2003-2008) 201Z – 37-47 Teeth, 520 Pitch","description":"\u003cp\u003eWhen lap times matter, every gram counts. The Sitta 201Z aluminium rear sprocket is purpose-engineered for the Suzuki GSX-R 1000 (2003–2008), delivering the kind of crisp, low-inertia power transfer that gives track riders a genuine edge — without sacrificing the durability demanded by hard road use.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCNC-machined from high-grade aluminium for a precise fit and vibration-free power delivery under race conditions\u003c\/li\u003e\n\u003cli\u003eWeighs approximately 350 g at size 45 — a meaningful unsprung weight reduction over steel alternatives\u003c\/li\u003e\n\u003cli\u003e520 pitch fitment with tooth options from 37 to 47, giving you full control over your GSX-R 1000's gearing character\u003c\/li\u003e\n\u003cli\u003eHard-anodised finish available — significantly more wear-resistant than standard anodising, ideal for track use\u003c\/li\u003e\n\u003cli\u003eFive additional colour options (black, silver, blue, red, green, orange, gold) to complement your build without compromising function\u003c\/li\u003e\n\u003cli\u003eSprocket carrier dimensions 120 x 140 mm, 5-hole pattern, bolt hole 10.50 mm for straightforward, accurate fitment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTrack Performance and Gearing Strategy\u003c\/h2\u003e\u003cp\u003eChoosing the right tooth count on the Sitta 201Z is the quickest way to transform how your GSX-R 1000 behaves on circuit. The engineering logic is straightforward: a smaller sprocket in the 37–42 tooth range tightens gearing ratios, reduces engine rpm at speed, and extends top-end performance on longer straights — the natural choice for high-speed tracks. Moving to the 43–47 tooth range shifts the balance toward sharper acceleration out of tighter corners and more responsive throttle feel, making the bike feel more agile and reactive through technical sections.\u003c\/p\u003e\u003cp\u003eBecause the 201Z is available across the full 37–47 tooth range in a single ordering step, you can dial in exactly the ratio your riding style and circuit layout demand. The hard-anodised surface treatment is particularly well suited to track environments where chain and sprocket loads are sustained and repeated across long sessions.\u003c\/p\u003e\u003ch2\u003eBuild Quality and Materials\u003c\/h2\u003e\u003cp\u003eThe 201Z is CNC-machined rather than cast, which means tooth profiles and carrier bore dimensions are held to tight tolerances from the outset. This directly reduces drivetrain vibration and ensures the chain seats consistently under load. The hard-anodised finish option goes beyond cosmetic protection — it builds a surface hardness that resists the accelerated wear associated with performance riding, keeping the tooth profile accurate for longer and extending the service life of the matched chain.\u003c\/p\u003e\u003ch2\u003eFitment and Compatibility\u003c\/h2\u003e\u003cp\u003eThe Sitta 201Z rear sprocket is a direct-fit replacement for the following model:\u003c\/p\u003e\u003cul\u003e\u003cli\u003eSuzuki GSX-R 1000, model years 2003 to 2008\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eCompatible with 520 pitch chains only. Sprocket carrier: 120 x 140 mm, 5-hole pattern, bolt hole diameter 10.50 mm. Part number: 201Z.\u003c\/p\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\u003e201Z\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eRear sprocket\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\u003ePitch\u003c\/th\u003e\n\u003ctd\u003e520\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Range\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\u003eWeight (size 45)\u003c\/th\u003e\n\u003ctd\u003eapprox. 350 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSprocket Carrier\u003c\/th\u003e\n\u003ctd\u003e120 x 140 mm, 5-hole, bolt hole 10.50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFitment\u003c\/th\u003e\n\u003ctd\u003eSuzuki GSX-R 1000 (2003–2008)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Sitta","offers":[{"title":"37 \/520 \/ Hard-Anodised","offer_id":53167939846410,"sku":"si201Z37od520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"37 \/520 \/ Black","offer_id":53167939879178,"sku":"si201Z37sw520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"37 \/520 \/ Silver","offer_id":53167939911946,"sku":"si201Z37si520","price":56.6,"currency_code":"EUR","in_stock":true},{"title":"37 \/520 \/ Blue","offer_id":53167939944714,"sku":"si201Z37bl520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"37 \/520 \/ Red","offer_id":53167939977482,"sku":"si201Z37r520","price":73.19,"currency_code":"EUR","in_stock":true},{"title":"37 \/520 \/ 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