Sitta 201M aluminium rear sprocket for Yamaha YZF-R6 525 pitch⟲ 360° — drag me
350 g
02 · Data & docs

The facts.

Technical data
BrandSitta
Part Number201M
MaterialAluminium
Chain Pitch525
Tooth Range37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48
Weight (size 45)approx. 350 g
Carrier Bolt Pattern110/130 — 6-bolt
Available FinishesSilver, Black, Hard-anodised, Red, Blue, Gold, Orange, Green
FitmentYamaha 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)
07 · Support

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