{"product_id":"sitta-aluminium-rear-sprocket-yamaha-yzf-r6-rj11-rj15-rj27","title":"Sitta Aluminium Rear Sprocket Yamaha YZF-R6 RJ11, RJ15 \u0026 RJ27 (2003-2026) – 525 Pitch, 37-48 Teeth (201M)","description":"\u003cp\u003eEngineered for the Yamaha YZF-R6 across all three chassis generations — RJ11, RJ15 and RJ27 — the Sitta 201M aluminium rear sprocket delivers a precise, secure fit that makes installation straightforward and long-term reliability a given. Available in tooth counts from 37 to 48 and eight distinct finishes, it gives every R6 rider a single part that covers both gearing strategy and personal expression without compromise.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFeatherlight aluminium construction tips the scales at just 350 g (size 45), reducing unsprung mass and sharpening throttle response without sacrificing rigidity.\u003c\/li\u003e\n\u003cli\u003e525-pitch teeth precisely machined for consistent chain engagement and minimised wear across both track sessions and high-mileage road use.\u003c\/li\u003e\n\u003cli\u003eSix-bolt carrier pattern 110\/130-6 ensures a flush, rattle-free mount on all compatible R6 rear hubs — no adapters, no fuss.\u003c\/li\u003e\n\u003cli\u003eHard-anodised finish option outlasts standard anodising, resisting chain abrasion and road grime significantly longer for riders who demand maximum longevity.\u003c\/li\u003e\n\u003cli\u003eEight colour choices — silver, black, hard-anodised, red, blue, gold, orange and green — let you tailor the drivetrain's appearance to the rest of the build.\u003c\/li\u003e\n\u003cli\u003eBroad tooth range (37-48) covers everything from top-speed-oriented circuit gearing to short, aggressive street ratios in a single part number.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eGearing Strategy Made Simple\u003c\/h2\u003e\u003cp\u003eSelecting the right rear sprocket tooth count has a direct and measurable effect on how your R6 feels at every point in the rev range. Understanding the trade-offs lets you choose once and ride with confidence.\u003c\/p\u003e\u003cp\u003eA smaller sprocket in the 37-42 tooth range raises the overall gearing, reducing engine revs at motorway speeds and unlocking a higher top speed on long straights — the preferred choice for circuits with sustained high-speed sections or touring-oriented road riders.\u003c\/p\u003e\u003cp\u003eStepping up to the 43-48 tooth range shortens the gearing, placing the R6's powerband to work earlier in each gear. The result is crisper acceleration out of slow corners, more responsive roll-on delivery and a more agile feel through technical sections — ideal for tight, twisty circuits or urban sport riding.\u003c\/p\u003e\u003ch2\u003eBuild Quality \u0026amp; Surface Finishes\u003c\/h2\u003e\u003cp\u003eThe 201M is cut from high-grade aluminium chosen for its combination of low mass and genuine structural integrity under sustained drivetrain load. The standard anodised finishes — silver, red, blue, gold, orange and green — provide a hard, corrosion-resistant surface layer that holds its colour well through the seasons. For riders operating in wet climates or running extended service intervals, the hard-anodised variant adds a measurably denser surface treatment that stands up to chain side-load and abrasive road contamination far better than conventional anodising.\u003c\/p\u003e\u003ch2\u003eFitment \u0026amp; Compatibility\u003c\/h2\u003e\u003cp\u003eThis sprocket is designed exclusively for the following models and is compatible only with 525-pitch chain:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eYamaha YZF-R6 RJ11 (2003-2005)\u003c\/li\u003e\n\u003cli\u003eYamaha YZF-R6 RJ15 (2006-2007)\u003c\/li\u003e\n\u003cli\u003eYamaha YZF-R6 RJ27 (2008-2026)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eCarrier bolt pattern: 110\/130 — 6-bolt. Always verify your existing chain pitch before ordering; this rear sprocket is not compatible with 520 or 530 pitch chains.\u003c\/p\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\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 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 (size 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