How to Change the Coolant in a 2017 Yamaha YZ250F: A MotoSport Guide
Shop parts for a 2017 Yamaha YZ250F Dirt Bike.
Changing the coolant in your 2017 Yamaha YZ250F is a straightforward maintenance task that keeps your engine protected against overheating and corrosion. This MotoSport-exclusive guide walks you through every step, identifying unique notes about your YZ250F and including expert tips for best performance.
What Makes the 2017 Yamaha YZ250F Cooling System Unique?
- Aluminum radiators – Efficient heat dissipation and anti-corrosion coolant a must.
- Recommended high-quality ethylene glycol anti-freeze (safe for aluminum engines) is essential for optimal engine life.
- Capacity: 1.0 liter (1.06 US qt) for the radiator and system combined.
- Drain bolt and radiator cap access is designed for quick, no-hassle servicing.
Tools & Supplies You Need
- 8mm or 10mm socket or wrench (for the drain bolt)
- Drain pan
- Funnel
- Distilled water (for flushing, optional)
- Fresh, quality coolant approved for aluminum engines
- Shop towels/rags
- Gloves and eye protection
Step-by-Step Coolant Change Procedure
- Let the Engine Cool: Never remove the radiator cap or drain coolant with a hot engine. Wait until all components are cool to the touch to avoid injury or burns.
- Remove the Radiator Cap: The cap is located on the left radiator. Slowly loosen it to release any pressure.
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Locate and Remove the Coolant Drain Bolt: The coolant drain bolt is usually beside the water pump, low on the right side of the engine. Place your drain pan directly underneath.
Loosen the bolt and let the coolant fully drain. Remove the bolt completely for best results. -
Flush the System (Recommended): If old coolant was dirty or neglected, reinstall the drain bolt and fill the system with distilled water. Start the engine and let it idle (cap off) for several minutes, then drain again.
This step helps remove old contaminants and residue for a cleaner system. - Reinstall the Drain Bolt: Apply light thread sealant if desired for leak protection. Tighten the drain bolt securely – do not overtighten.
- Add New Coolant: Using a funnel, pour the recommended coolant into the radiator until full. Pour slowly to release air pockets.
- Check for Leaks: Inspect the drain bolt and connections for leaks.
- Bleed the System: Start the engine and let it run with the radiator cap off. Gently rev several times to help any air bubbles escape. Watch the coolant level – top off as needed.
- Replace the Radiator Cap: Once no more air bubbles appear and the level remains steady, reinstall the cap securely.
- Final Check: Ride for a few minutes or let the bike idle until warm, then let it fully cool and recheck coolant level. Add more if needed.
Tips and Warnings for the 2017 YZ250F Owner
- Always use coolant formulated for aluminum engines – plain water offers zero corrosion protection and lowers freeze point. If using water for emergency reasons, flush and refill with proper coolant as soon as possible.
- Check the condition of radiator hoses and clamps while servicing. Replace if brittle, cracked, or leaking for long-term reliability.
- Never mix different coolant types or colors unless specified by the coolant manufacturer.
- Properly dispose of used coolant according to local regulations. It is toxic to animals and humans.
- The YZ250F cooling loop is compact, so air pockets can block proper flow. Use the bleed step above for best results.
When to Change Coolant on Your YZ250F?
- Yamaha recommends regular coolant replacement as part of routine maintenance. For performance bikes like the YZ250F, inspect coolant at the start of every riding season, and fully change it every 2 years or 40–60 hours of operation.
Related Shopping Categories
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Shop Radiator Hoses for a 2017 Yamaha YZ250F Dirt Bike.
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.