Sitta Aluminium Rear Sprocket Kawasaki ZX-6R/636/RR (2007-2026) 201W – 37-47 Teeth, 520 Pitch

Engineered for riders who demand precision and durability in equal measure, the Sitta 201W aluminium rear sprocket is purpose-built for the Kawasaki ZX-6R, ZX-636, and ZX-6RR (2007–2026). Manufactured from high-grade aluminium and available in eleven tooth counts from 37 to 47, this sprocket lets you dial in your gearing with confidence — whether you're chasing lap times or maximising road performance.

Key Features

• High-grade aluminium construction delivering exceptional strength at just 350 g (size 45), reducing unsprung and rotating mass for sharper throttle response.
• 520 pitch specification, optimised for performance and racing applications on the ZX-6R platform.
• Eleven tooth options (37 to 47) for precise gearing adjustment to suit track days, circuit racing, or spirited road riding.
• Sprocket carrier fitment: 80/104-6 hole pattern ensures accurate, trouble-free installation with no modification required.
• Eight finish options — including hard-anodised, which outlasts standard anodising under sustained high-load conditions — as well as black, silver, orange, blue, gold, red, and green.
• Precision CNC machining for consistent tooth profile, minimising chain wear and maximising drivetrain efficiency.

Gearing — Choosing the Right Tooth Count

Selecting the correct rear sprocket tooth count has a direct and measurable effect on how your Kawasaki ZX-6R performs. Understanding the trade-offs helps you make the right call for your riding style and circuit profile.

• Fewer teeth (37–42): produces a taller overall gear ratio, raising top speed and reducing engine revs at sustained high speeds — ideal for long straights and fast flowing circuits.
• More teeth (43–47): produces a shorter overall gear ratio, sharpening acceleration and improving mid-corner drive — the go-to choice for tight, technical tracks or punchy road riding.

The Sitta 201W gives you the full spectrum of that adjustment in a single, consistent product line, so you can fine-tune your ZX-6R's drivetrain without compromising on quality.

Construction and Finish

The 201W is CNC-machined from high-quality aluminium alloy, combining a low rotating weight with the structural rigidity needed to handle the power delivery of the ZX-6R's inline-four. The hard-anodised finish option is particularly notable: the hard-anodising process penetrates deeper into the aluminium surface than standard anodising, producing a significantly harder outer layer that resists abrasion and corrosion far more effectively during prolonged use. The remaining seven colour finishes — black, silver, orange, blue, gold, red, and green — are standard anodised and offer a clean, durable appearance suited to road and occasional track use.

Fitment and Compatibility

The Sitta 201W rear sprocket is compatible with the following models:

• Kawasaki ZX-6R Ninja — model years 2007 to 2026
• Kawasaki ZX-636 Ninja — model years 2007 to 2026
• Kawasaki ZX-6RR Ninja — model years 2007 to 2026

Sprocket carrier specification: 80/104-6 hole pattern. Chain pitch: 520 only. Verify your existing chain pitch before ordering.

Specifications