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Sprockets set your gearing. One tooth fewer at the front, or a couple more at the rear, makes the bike pull harder out of corners and lifts the front sooner, at the cost of top speed and higher revs on the highway. Going the other way calms it down. Worn sprockets have hooked or pointed teeth and will wear out a new chain quickly.
Fits 21 models from Aprilia, BMW and Husqvarna: see the list below
| Bike | Years | Stock gearing (front / rear) |
|---|---|---|
| Aprilia Falco SL 1000 | 2000–2004 | 17 / 41 |
| Aprilia RSV 1000 Mille/R/SP | 1998–2009 | 17 / 40 |
| Aprilia RSV 1000R/Factory | 2004–2009 | 16 / 40 |
| Aprilia RSV Tuono/Racing | 2004 | 17 / 40 |
| Aprilia RSV Tuono/Tuono Racing | 2006–2010 | 16 / 40 |
| Aprilia RSV4 1000 Racing Factory LE | 2016–2017 | 16 / 41 |
| Aprilia RSV4 | 2009–2020 | 16 / 42 |
| Aprilia RSV4 | 2017–2019 | 16 / 41 |
| Aprilia RSV4 | 2021–2023 | 16 / 41 |
| Aprilia Tuono V4 Factory | 2017 | 15 / 42 |
| Aprilia Tuono V4 Factory | 2021–2024 | 15 / 42 |
| Aprilia Tuono V4 | 2021–2023 | 15 / 40 |
| Aprilia Tuono V4RR | 2017–2018 | 15 / 42 |
| BMW F 650 GS | 2008–2011 | — |
| BMW F 700 GS | 2013–2018 | — |
| BMW F 750 GS | 2018–2021 | — |
| BMW F 800 GS | 2009–2018 | — |
| BMW F 850 GS | 2018–2022 | — |
| BMW F 900 GS Adv | 2022 | — |
| BMW F 900 GS SF | 2024 | — |
| BMW F 900 GS | 2022–2024 | — |
| BMW F 900 R | 2020–2022 | — |
| BMW F 900 XR | 2019–2022 | — |
| Husqvarna 900 Nuda/Nuda R | 2012–2013 | — |
Every tooth count of this front sprocket fits the bikes above. Choose the stock count to keep your gearing, or a different one to change it.
Changing tooth counts changes your speedometer reading on most bikes, and may need a different chain length. Replace sprockets and chain together.
| Position | Front (countershaft) |
|---|---|
| Pitch | 525 |
| Material | Steel |
| Style | 407 |
| Tooth counts | 15–17 |
Ships to the lower 48 and DC. Returns accepted on most items.