Yamaha RD
Coolant capacity & service interval
Yamaha RD coolant capacity ranges from 1,5 to 2,3 liters. Service intervals require changes every 24000 km or 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 |
|---|---|
| RD 350 (1984-1990) |
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| RD 500 LC (1981-1987) |
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Additional Notes
- The Yamaha RD 350 cooling system holds 1.5 liters of coolant, while the RD 500 LC carries a noticeably larger 2.3-liter capacity, reflecting the greater engine displacement and heat output of the 500cc configuration.
- Both the RD 350 and RD 500 LC share the same coolant change interval of 24,000 km or 24 months under normal use conditions, whichever comes first.
- The RD 350 cooling system specification applies to model years 1984-1990, whereas the RD 500 LC specification covers 1981-1987, meaning the two configurations overlap in the mid-1980s period.
- A 1.5-liter coolant capacity on the RD 350 is consistent with a single or parallel-twin liquid-cooled engine of moderate displacement, where the cooling jacket volume remains relatively compact.
- The 2.3-liter figure on the RD 500 LC represents a substantially larger cooling circuit, which in a high-performance two-stroke V4 layout accommodates the additional cylinder head passages and radiator volume required to manage thermal load.