Aprilia RS/RS4
Brake fluid capacity & service interval
Aprilia RS/RS4 brake fluid capacity ranges between min and max. Service intervals include 18000 km or 24 months and 24 months. The data covers 3 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| RS125 Euro 4 (2017- ) |
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| RS4 125 (2011-2017) |
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| RS4 50 (2010-2017) |
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Additional Notes
- The Aprilia RS/RS4 brake fluid specifications cover the hydraulic brake system across all three variants listed, meaning the fluid level and change intervals apply to the brake circuit rather than a clutch or combined system.
- Brake fluid level for the RS125 Euro 4 and RS4 125 is expressed as a range between a minimum and maximum mark, which is standard reservoir-based guidance rather than a fixed fill volume, so no single capacity figure in milliliters is given.
- The RS4 50 follows the same min-to-max level specification as the larger-displacement variants, keeping level monitoring consistent across the lineup.
- The RS125 Euro 4 and RS4 125 share an identical change interval of 18,000 km or 24 months under normal use conditions, meaning whichever threshold is reached first triggers a fluid replacement.
- The RS4 50 carries a change interval expressed solely as 24 months, with no kilometer-based threshold listed alongside it, making age the only stated trigger for fluid replacement on that variant.
- The absence of a mileage component in the RS4 50 interval reflects the lower annual distances typically associated with 50 cc machines, where time-based fluid degradation becomes the more relevant factor.
- Brake fluid absorbs moisture over time regardless of mileage, which is why a 24-month ceiling appears across all three variants even when a kilometer interval is also present.
- The RS4 125 covers model years 2011-2017, while the RS4 50 covers 2010-2017, meaning the 50 cc variant has one additional model year represented in the specification set.