{"product_id":"sitta-aluminium-rear-sprocket-suzuki-gsx-r-1000-525-37","title":"Sitta Aluminium Rear Sprocket Suzuki GSX-R 1000 (2009-2023) – 525 Pitch, 37-48 Teeth (201M)","description":"\u003cp\u003eMachined from high-grade aluminium and finished to exacting tolerances, the Sitta 201M rear sprocket is engineered specifically for the Suzuki GSX-R 1000 in model years 2009 through 2023. Where stamped steel sprockets add unnecessary rotating mass, the 201M keeps weight to just 350 g at 45 teeth — a measurable advantage whether you are hunting lap times on track or extracting the most from spirited road riding.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePremium aluminium construction delivers a weight of only 350 g (at size 45), reducing unsprung and rotating mass for sharper throttle response and improved handling.\u003c\/li\u003e\n\u003cli\u003eEight anodised colour options — silver, black, hard-anodised, red, blue, orange, gold and green. The hard-anodised finish penetrates deeper into the alloy than standard anodising, providing superior abrasion resistance and a longer service life.\u003c\/li\u003e\n\u003cli\u003eTwelve tooth counts available — 37 through 48 — allowing precise gearing adjustment for track use, road touring or anything in between.\u003c\/li\u003e\n\u003cli\u003eSprocket carrier pattern 110\/130-6 bolt ensures a precise, rattle-free fit and straightforward installation without modification.\u003c\/li\u003e\n\u003cli\u003eExclusively engineered for 525 pitch chains, maintaining optimal load distribution across each link for reduced wear on both sprocket and chain.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePrecision Build Quality\u003c\/h2\u003e\u003cp\u003eSitta manufactures the 201M from a high-strength aluminium alloy that balances low mass with the rigidity required to handle sustained high-load power delivery. Each tooth profile is CNC-machined for consistent chain engagement and even wear distribution, extending service intervals beyond what a cast or stamped alternative can offer. The hard-anodised variant takes this further: the electrochemical treatment creates a surface hardness that outlasts conventional anodising, making it the preferred choice for track riders who cover high mileage between sprocket changes.\u003c\/p\u003e\u003ch2\u003eGearing Strategy\u003c\/h2\u003e\u003cp\u003eSelecting the correct tooth count is one of the most cost-effective performance adjustments available for the GSX-R 1000. Fitting a smaller sprocket in the 37-42 teeth range shortens the overall gearing ratio, raising top speed and reducing engine revs on long straights or motorway runs. Moving to a larger sprocket in the 43-48 teeth range lengthens the ratio, sharpening acceleration out of corners and delivering more responsive throttle feel — the choice of track riders who prioritise drive over maximum speed. The 201M's twelve-count range means you can dial in exactly the ratio that suits your riding style without compromising fitment quality.\u003c\/p\u003e\u003ch2\u003eFitment and Compatibility\u003c\/h2\u003e\u003cp\u003eThis sprocket is designed and validated for the following application:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSuzuki GSX-R 1000 — model years 2009 to 2023\u003c\/li\u003e\n\u003cli\u003e525 pitch chain only — not compatible with 520 or 530 pitch chains\u003c\/li\u003e\n\u003cli\u003eSprocket carrier: 110\/130-6 bolt pattern\u003c\/li\u003e\n\u003cli\u003ePart number: 201M\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eAttribute\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\u003e201M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAluminium alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChain pitch\u003c\/td\u003e\n\u003ctd\u003e525\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTooth count range\u003c\/td\u003e\n\u003ctd\u003e37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eapprox. 350 g (at 45 teeth)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSprocket carrier bolt pattern\u003c\/td\u003e\n\u003ctd\u003e110\/130 – 6 bolt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable colours\u003c\/td\u003e\n\u003ctd\u003eSilver, black, hard-anodised, red, blue, orange, gold, green\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eSuzuki 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