How to Change the Coolant in a 2019 Yamaha WR250R (Dual Sport)
Shop parts for a 2019 Yamaha WR250R Dirt Bike.
Regular coolant maintenance is crucial for your Yamaha WR250R – not only to keep your engine from overheating but also to maximize longevity and performance on or off the trails. This step-by-step guide covers everything you need for a thorough DIY coolant change tailored specifically for the 2019 WR250R. The WR250R features a compact liquid-cooled engine with a narrow frame and tucked-in radiator, so some access steps are model-specific.
What You Need
- OEM-approved coolant (Yamaha or equivalent motorcycle coolant)
- Distilled water (for flushing, optional but recommended)
- Funnel
- Drain pan
- Metric socket set (including 8mm socket)
- Allen keys
- Phillips screwdriver
- Torque wrench (optional, for reinstalling drain bolt and fasteners)
- Rags and gloves
Special Note for 2019 WR250R Owners
The WR250R's coolant reservoir is located under the seat and air scoops. Accessing it requires removing the seat and side panels, which is more involved compared to some other models. Be patient when removing the reservoir – the vent hose and dip tube need to be carefully disconnected, and the unit can be tricky to slide out due to the frame design. Taking your time with this step will help avoid any damage.
Step-by-Step Coolant Change Procedure
- Let the engine cool completely. Never open the radiator cap or hoses while hot to avoid burns.
- Remove bodywork: Use your 8mm socket, Allen keys, and Phillips screwdriver to take off the seat and both left/right air scoops. This gives you full access to the radiator and reservoir tank.
- Access & remove the coolant reservoir: Disconnect the reservoir vent hose and dip tube. Unbolt the recovery tank and gently remove it from the frame. Dump any old coolant from the tank into your drain pan.
- Drain the old coolant: Locate the water pump's coolant drain bolt on the lower side of the engine. Position your drain pan under it, then remove the bolt to let the coolant flow out. Carefully open the radiator cap to help drainage.
- Optional flush: For a thorough clean, briefly reinstall the bolt, fill the radiator with distilled water, run the engine for 2-3 minutes, shut it off, and drain again. Repeat until water runs clear.
- Reinstall drain bolt: Make sure the sealing washer is in good condition, then torque the bolt as specified in your owner's manual (do not overtighten).
- Fill the radiator: Using a funnel, slowly pour new coolant into the radiator until it's full. Fill the reservoir tank to the correct line as well.
- Bleed air from the system: With the radiator cap off, start the engine and let it idle. Watch for air bubbles as the coolant circulates; add coolant as the level drops. Once bubbling stops and the level stabilizes, shut off the engine and top up again if needed.
- Reinstall all parts: Secure the radiator cap, refit the reservoir, and reinstall all panels and the seat.
- Final check: Inspect for any leaks. After your first ride, check the coolant level again and top up if necessary.
Extra Tips for WR250R Owners
- The WR250R has a relatively small coolant capacity (around 1.1 liters, check your manual for the precise figure).
- Yamaha recommends changing coolant at least every two years, or more often in harsh conditions.
- Always use coolant suitable for aluminum engines; pre-mixed, silicate-free coolants are best to prevent corrosion.
- If you notice persistent loss of coolant or signs of overheating, inspect your water pump and radiator for wear or damage.
Doing your own coolant change on the 2019 Yamaha WR250R is straightforward yet important — especially for riders who push their dual sport in tough environments. Regular maintenance protects your bike's unique high-revving engine, ensuring you get the most out of every ride.
Related Shopping Categories
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Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.