{"product_id":"sitta-aluminium-rear-sprocket-yamaha-yzf-r1-201m","title":"Sitta Aluminium Rear Sprocket Yamaha YZF-R1 (2003-2014) 201M – 37-48 Teeth, 520 Pitch","description":"\u003cp\u003eCrafted from precision-machined aluminium and finished in a palette of eight anodised colours, the Sitta 201M rear sprocket brings race-bred heritage and unmistakable style to the Yamaha YZF-R1 drivetrain. Whether you are chasing lap times or simply demanding the best from a decade-old superbike platform, this is a sprocket built to the same exacting standards that have made Sitta a trusted name in European motorsport.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLightweight aluminium construction weighing just 350 g at 45 teeth — reducing unsprung rotational mass for sharper throttle response and improved handling.\u003c\/li\u003e\n\u003cli\u003eEight finish options including silver, black, hard-anodised, red, blue, gold, green and orange — hard-anodising delivering significantly greater surface hardness and longevity than standard anodising.\u003c\/li\u003e\n\u003cli\u003eBroad tooth range from 37 to 48 teeth on a 520 pitch, allowing precise gearing adjustment for road sport or track use.\u003c\/li\u003e\n\u003cli\u003eSprocket carrier pattern 110\/130-6 bolt for accurate, straightforward installation on the YZF-R1 hub.\u003c\/li\u003e\n\u003cli\u003eEngineered for high-load durability — the alloy and surface treatment resist wear even under sustained track conditions.\u003c\/li\u003e\n\u003cli\u003ePart number 201M — a Sitta catalogue reference with a long competition heritage.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDialling In Your Gearing\u003c\/h2\u003e\u003cp\u003eThe 520 pitch and twelve tooth options make the 201M one of the most versatile sprockets available for the R1 platform. Selecting a smaller sprocket in the 37-to-42 tooth range lengthens the overall gearing ratio, raising top speed and reducing engine revs at motorway pace — ideal for open circuits or long touring stints. Moving up to the 43-to-48 tooth range shortens the ratio, sharpening acceleration out of slow corners and making the bike feel more responsive through technical sections. Pairing a new rear sprocket with a matched front sprocket and fresh 520 chain will unlock the full benefit of any ratio change.\u003c\/p\u003e\u003ch2\u003eFinish and Heritage\u003c\/h2\u003e\u003cp\u003eSitta has been producing drivetrain components for road and competition machines across Europe for decades. The 201M reflects that lineage: tolerances are held tight, the tooth profile is optimised for 520 chain engagement, and every colour option receives a consistent, hard-wearing anodised layer. The hard-anodised variant in particular offers a surface that resists abrasion from chain contact and road debris far beyond what standard anodising can provide, making it the finish of choice for riders who log serious mileage.\u003c\/p\u003e\u003ch2\u003eFitment and Compatibility\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eYamaha YZF-R1 — model years 2003 to 2014\u003c\/li\u003e\n\u003cli\u003e520 pitch only\u003c\/li\u003e\n\u003cli\u003eSprocket carrier: 110\/130-6 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\u003e201M\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\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eapprox. 350 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