How to Change the Coolant in a 2017 Honda CRF250R

Shop parts for a 2017 Honda CRF250R Dirt Bike.

Changing the coolant on your 2017 Honda CRF250R is critical to sustaining optimal engine temperature, preventing overheating, and maximizing the lifespan of your dirt bike. The steps below guide you through the process, including specific tips every CRF250R owner should know.

What You Need

  • Silicate-free motorcycle coolant (pre-mixed or mix yourself according to bottle instructions; avoid regular automotive coolant)
  • Drain pan
  • Ratchet and appropriate sockets (typically 8mm – 10mm)
  • Phillips screwdriver
  • Clean funnel
  • Shop towels or rags
  • Replacement crush washer for drain bolt (recommended)
  • Gloves – for safe handling

Preparation

  • Park the CRF250R on a level surface with the engine completely cool. Opening the radiator on a hot engine can cause scalding coolant to spray out.
  • Ensure you have the correct coolant capacity for your 2017 CRF250R: typically about 0.98 US qt (0.93L) for a coolant change. Always check your owner's manual for details on model-specific capacity and coolant recommendations.

Removing the Old Coolant

  1. Remove the right-side radiator shroud or plastics as necessary to access the radiator cap and drain bolt. This may require removing 8mm – 10mm bolts and a few plastic retainers.
  2. Place the drain pan under the water pump-area drain bolt (at the lower front right of engine).
  3. Slowly loosen, then remove, the radiator cap to allow air in and coolant to flow out. Never remove this while the engine is hot.
  4. Remove the coolant drain bolt and its sealing washer. Allow all old coolant to drain completely.
  5. Inspect the drain washer. Replace with a new crush washer if deformed or damaged.

Flushing the System (Optional but Recommended)

  • For added protection, you can flush the system with distilled water before adding new coolant. Pour distilled water into the radiator, allow it to drain, then proceed to refill.

Refilling with New Coolant

  1. Reinstall the drain bolt with the new or cleaned washer. Tighten firmly but do not overtighten.
  2. Using a funnel, slowly pour new coolant into the radiator until it reaches the bottom of the filler neck.
  3. Reinstall the radiator cap – align, press down and turn it until fully seated and locked.
  4. Start the engine and let it idle for 3–5 minutes. This circulates coolant and purges air from the system.
  5. Turn off the engine, let it fully cool, then remove the radiator cap to check the level. Top off if needed.
  6. Reinstall plastics in the reverse order of removal.

Model-Specific Tips for the 2017 CRF250R

  • Your CRF250R has a race-oriented cooling system with a relatively small volume – it loses coolant faster through normal operation, especially during high-rpm riding. Regularly check the coolant level before every ride.
  • A small coolant loss (approx. 0.7 – 2.0 US oz, or 20 – 60 cm3) through the overflow tube is normal; loss beyond that may indicate a leak or problem requiring inspection.
  • Always use the recommended coolant type. Avoid automotive coolants with silicates, which can damage water pump seals and clog radiators.
  • Tighten the radiator cap securely. An improperly installed cap can lead to severe overheating and engine damage.

Maintenance Intervals

  • Honda recommends replacing the coolant every two years, or sooner if the bike undergoes frequent racing or rides in hot conditions.
  • Always inspect for leaks after a coolant change and before each ride.

Dispose of Old Coolant Properly

  • Used coolant is toxic. Always collect it in a sealed container and bring it to an appropriate hazardous waste facility.

With correct care and regular coolant changes, your 2017 Honda CRF250R will continue delivering reliable power on every ride.

Related Shopping Categories

Shop Radiators for a 2017 Honda CRF250R Dirt Bike.

Shop Coolant for a 2017 Honda CRF250R Dirt Bike.

Shop Temperature Sensors for a 2017 Honda CRF250R Dirt Bike.

Shop Tools for a 2017 Honda CRF250R Dirt Bike.

Shop Radiator Hoses for a 2017 Honda CRF250R 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.