Gas Gas Halley
Brake fluid capacity & service interval
Gas Gas Halley brake fluid capacity ranges between min and max. Service intervals require a change every 24 months. The data covers 4 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| Halley EH 125 (2009-2009) |
|
| Halley EH 450 (2009-2009) |
|
| Halley GM 450 (2009-2009) |
|
| Halley SM 125 (2009-2009) |
|
Additional Notes
- Brake fluid capacity across all four Gas Gas Halley variants is expressed as a reservoir level range rather than a fixed volume, with the fluid kept between the minimum and maximum marks on the reservoir.
- The Halley EH 450 and Halley GM 450 both carry a 24-month brake fluid change interval under normal use conditions, applied to their hydraulic brake systems.
- The Halley EH 125 and Halley SM 125 share the same level-based fill specification for their hydraulic brake systems but do not carry a stated change interval in the specifications.
- A 24-month service interval for brake fluid is consistent with the hygroscopic nature of glycol-based brake fluids, which absorb moisture over time and lower the boiling point of the fluid, reducing braking performance.
- The 125 cc and 450 cc variants within the Halley range differ in whether a periodic replacement interval is specified, with only the 450 cc models carrying the 24-month change requirement.