⟲ 360° — drag meThe facts.
| Brand | Sitta |
|---|---|
| Part Number | 201M |
| Material | Aluminium |
| Chain Pitch | 525 |
| Tooth Range | 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48 |
| Weight (size 45) | approx. 350 g |
| Carrier Bolt Pattern | 110/130 — 6-bolt |
| Available Finishes | Silver, Black, Hard-anodised, Red, Blue, Gold, Orange, Green |
| Fitment | Yamaha YZF-R6 RJ11, RJ15, RJ27 (2003-2026) |
DescriptionThe whole story▼
Engineered 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.
Key Features
- Featherlight aluminium construction tips the scales at just 350 g (size 45), reducing unsprung mass and sharpening throttle response without sacrificing rigidity.
- 525-pitch teeth precisely machined for consistent chain engagement and minimised wear across both track sessions and high-mileage road use.
- Six-bolt carrier pattern 110/130-6 ensures a flush, rattle-free mount on all compatible R6 rear hubs — no adapters, no fuss.
- Hard-anodised finish option outlasts standard anodising, resisting chain abrasion and road grime significantly longer for riders who demand maximum longevity.
- Eight 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.
- Broad tooth range (37-48) covers everything from top-speed-oriented circuit gearing to short, aggressive street ratios in a single part number.
Gearing Strategy Made Simple
Selecting 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.
A 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.
Stepping 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.
Build Quality & Surface Finishes
The 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.
Fitment & Compatibility
This sprocket is designed exclusively for the following models and is compatible only with 525-pitch chain:
- Yamaha YZF-R6 RJ11 (2003-2005)
- Yamaha YZF-R6 RJ15 (2006-2007)
- Yamaha YZF-R6 RJ27 (2008-2026)
Carrier 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.
Specifications
| Attribute | Detail |
|---|---|
| Brand | Sitta |
| Part Number | 201M |
| Material | Aluminium |
| Chain Pitch | 525 |
| Tooth Range | 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48 |
| Weight (size 45) | approx. 350 g |
| Carrier Bolt Pattern | 110/130 — 6-bolt |
| Available Finishes | Silver, Black, Hard-anodised, Red, Blue, Gold, Orange, Green |
| Fitment | Yamaha YZF-R6 RJ11, RJ15, RJ27 (2003-2026) |
FitmentWhich bikes this fits▼
- Yamaha YZF-R6 RJ11, RJ15 & RJ27 (2003–2026)
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