Aprilia RX
Brake fluid capacity & service interval
Aprilia RX brake fluid capacity ranges between min and max. Service intervals include checks at 1000 km and 4000 km, with fluid changes at 12 months or 18000 km/24 months. The data covers 5 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| RX 125 Euro 5 (2021- ) |
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| RX 125 Euro 4 (2017-2021) |
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| RX 125 (2008-2017) |
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| RX 125 (1997-2007) |
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| RX 125 (1997-2007) |
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Additional Notes
- Across all Aprilia RX 125 configurations, the brake fluid reservoir level is maintained between the minimum and maximum marks rather than filled to a fixed volume, which is standard practice for hydraulic brake systems where fluid level reflects pad wear rather than a measurable capacity.
- The RX 125 produced from 1997-2007 carries an initial service check interval of 1000 km, applied only during the break-in period, after which the standard 4000 km check interval takes over under normal use conditions.
- Under normal use, the 1997-2007 RX 125 specifies a fluid change interval of 12 months regardless of distance, reflecting the time-based degradation of brake fluid through moisture absorption rather than mechanical wear alone.
- The RX 125 from 2008-2017 retains the same 4000 km check and 12-month change intervals as the earlier 1997-2007 generation, indicating continuity in brake system service requirements across those two production periods.
- The RX 125 Euro 4, covering 2017-2021, shifts from a 12-month change interval to a combined 18000 km or 24-month interval, representing a notably longer service cycle compared to the pre-Euro 4 specifications.
- The Euro 4 and Euro 5 variants of the RX 125 share identical brake fluid change intervals of 18000 km or 24 months, with neither specifying a separate initial service or distance-only check interval as seen in earlier generations.