Yamaha YFM 660RS
Coolant capacity & service interval
Yamaha YFM 660RS coolant capacity ranges from 0,29 to 1,3 liters. Service intervals include checks every 2400 km or 150 hours and changes every 24 months. The data covers 2 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| YFM660RS, 5LPH (2004-2006) |
|
| YFM660RS, 5LPL (2004-2006) |
|
Additional Notes
- The Yamaha YFM 660RS cooling system carries a total fluid capacity of 1.3 liters, which breaks down into 0.58 liter held in the radiator and 0.29 liter held in the reservoir, with the remainder distributed through the system passages.
- The radiator capacity of 0.58 liter represents the primary circuit volume, while the 0.29-liter reservoir serves as the overflow and expansion chamber that accommodates coolant displaced by thermal expansion during operation.
- A total system capacity of 1.3 liters is relevant when performing a full coolant flush, as a complete drain and refill requires accounting for all three volume figures rather than the radiator figure alone.
- Under normal use conditions, the 5LPH variant specifies a coolant check interval of 2,400 km or 150 hours, whichever comes first, giving operators a dual-trigger maintenance threshold tied to either distance or engine runtime.
- The change interval for the 5LPH variant under normal use is set at 24 months, meaning coolant replacement is time-based rather than mileage-based for scheduled service purposes.
- The 5LPL variant for 2004-2006 shares the same three-part capacity figures as the 5LPH variant, with 0.58 liter in the radiator, 0.29 liter in the reservoir, and 1.3 liters total, indicating identical cooling system volume between the two configurations.