Sitta Aluminium Rear Sprocket Yamaha YZF-R1 2003-2014 (201M) – 37-48 Teeth, 525 Pitch

Crafted from lightweight aluminium and finished in eight anodised colours, the Sitta 201M rear sprocket is engineered specifically for the Yamaha YZF-R1 (2003–2014). This is a sprocket that earns its place on the bike through precise manufacturing heritage and a finish that holds up under sustained track and road punishment alike.

Key Features

• Premium aluminium construction weighing approximately 350 g (at size 45) for an immediate reduction in unsprung mass without sacrificing structural integrity.
• Eight finish options — silver, black, hard-anodised, red, blue, gold, green and orange — allowing a tailored visual match to your R1's livery. The hard-anodised variant offers superior surface hardness and longer service life compared to standard anodising.
• Wide tooth selection from 37 to 48 teeth in 525 pitch, covering the full range from top-speed-biased gearing to aggressive acceleration setups.
• Sprocket carrier interface: 110/130 – 6-hole bolt pattern for precise, rattle-free fitment on the YZF-R1 carrier.
• Consistent tooth profile geometry ensures low wear even under sustained high-load conditions, on circuit or on road.
• Part number 201M — a long-established Sitta reference, ensuring straightforward reordering and cross-referencing.

Design, Finish and Heritage

Sitta has supplied drivetrain components to serious riders across Europe for decades, and the 201M reflects that accumulated expertise. The sprocket blank is machined to close tolerances, then anodised in the colour of your choice. The hard-anodised option is worth special mention: the electrolytic process penetrates deeper into the aluminium substrate than conventional anodising, producing a surface that resists abrasion from the chain side-plates far longer than a standard colour finish. Whether you are chasing lap times at a trackday or accumulating kilometres on a favourite road route, the finish you choose will perform proportionally to the demands placed on it.

Choosing the Right Gearing for Your Riding Style

The tooth count you select shapes the entire character of the YZF-R1's drivetrain response. A smaller rear sprocket in the 37–42 tooth range lowers the overall gearing ratio, raising top speed and reducing engine revs at motorway cruising speeds — useful for long open-road stages or high-speed circuits. Moving up to the 43–48 tooth range tightens the gearing, sharpening throttle response out of slow corners and improving acceleration from low speeds, which suits technical circuits and twisting B-roads. The 201M's availability across the full 37–48 tooth spread means you can dial in exactly the ratio your riding demands without sourcing a different sprocket family.

Fitment and Compatibility

This sprocket is designed exclusively for the following application:

• Yamaha YZF-R1, model years 2003 to 2014
• 525 pitch chain only — this sprocket is not compatible with 520 or 530 pitch chains
• Sprocket carrier: 110/130 – 6-hole pattern

Specifications