The facts.
| Brand | Sitta |
|---|---|
| Part number | Y001 |
| Type | Front sprocket |
| Material | Chrome-molybdenum steel |
| Tooth options | 14, 15, 16, 17, 18 teeth |
| Chain pitch | 520 / 525 |
| Fitment | BMW S1000RR K46 (2009–2018) |
| Intended use | Road and track |
DescriptionThe whole story▼
Dialling in the gearing on your BMW S1000RR K46 is one of the most cost-effective tuning moves you can make, and the Sitta front sprocket Y001 makes it effortless. Available in tooth counts from 14 to 18 and compatible with both 520 and 525 pitch chains, it gives you a precise, fatigue-free ride whether you are hunting lap times or covering motorway miles in relaxed comfort.
Key Features
- Manufactured from chrome-molybdenum steel for exceptional strength, wear resistance and long service life
- Precision-machined for an exact, rattle-free fit on the BMW S1000RR K46 — no shimming or adjustment required after installation
- Five tooth options (14, 15, 16, 17 and 18 teeth) let you tailor acceleration and top speed to your riding style
- Compatible with both 520 and 525 pitch chains, supporting standard and conversion drivetrain setups
- Equally suited to road and track use, maintaining consistent power delivery under sustained high-rpm loading
Choosing the Right Gearing
The front sprocket has a surprisingly large influence on how the S1000RR feels to ride all day. A smaller sprocket shortens gearing, sharpening throttle response and exit acceleration — ideal when you want the engine to pull hard out of slower corners or when commuting in traffic demands snappy, effortless progress. A larger sprocket lengthens gearing, dropping cruising revs on the motorway and softening the hit so the bike feels more planted and relaxed over longer distances.
As a practical guide: fitting a 14 or 15-tooth sprocket produces shorter, punchier gearing with faster engine spin-up, while a 17 or 18-tooth unit extends each gear for a higher top speed and a more composed, easier-riding character at motorway pace. The 16-tooth option sits at the factory-style sweet spot, balancing both demands.
Build Quality
Sitta manufactures the Y001 from chrome-molybdenum steel — the same alloy class used in high-load motorsport components — delivering a hardness profile that resists the rapid flank wear that can plague lesser sprockets under aggressive riding. The tooth profile is precision-cut to mesh cleanly with a fresh chain from the very first ride, reducing the bedding-in period and minimising drivetrain noise. This is a sprocket designed to stay consistent across thousands of kilometres, not just look good in the packaging.
Fitment and Compatibility
The Sitta Y001 front sprocket fits the following models:
- BMW S1000RR K46 — model years 2009 to 2018
Available for 520 pitch and 525 pitch chain configurations. Always replace the sprocket in conjunction with the rear sprocket and chain for optimum drivetrain life.
Specifications
| Brand | Sitta |
|---|---|
| Part Number | Y001 |
| Type | Front sprocket |
| Material | Chrome-molybdenum steel |
| Tooth options | 14, 15, 16, 17, 18 teeth |
| Chain pitch | 520 / 525 |
| Fitment | BMW S1000RR K46 (2009–2018) |
| Intended use | Road and track |
FitmentWhich bikes this fits▼
- BMW S1000RR K46 (2009–2018)
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