How to Change the Coolant in a 2000 Honda CR500
Shop parts for a 2000 Honda CR500 Dirt Bike.
Keeping your 2000 Honda CR500 running cool is critical for both peak performance and long engine life. Regular coolant changes are essential for maintaining your bike's high-output two-stroke engine, especially since the CR500's air-cooled origins evolved into a liquid-cooled powerhouse known for significant heat generation in demanding conditions. Follow this proprietary MotoSport guide for a safe, thorough coolant change process and key notes unique to the legendary CR500.
Tools – Supplies Needed
- Ethylene glycol-based coolant (safe for aluminum radiators)
- Drain pan
- Rags or shop towels
- Metric socket set (typically 8mm, 10mm, check your water pump)
- Funnel
- New crush washer for drain bolt (Honda: 90463-ML7-000 recommended)
- Distilled water (for optional flush)
- Protective gloves and eyewear
Step-by-Step Coolant Change for the CR500
- Ensure the bike is completely cool. Hot systems can cause severe burns when caps or bolts are opened.
- Position the bike on a stand keeping it level for accurate draining and filling.
- Remove the radiator cap slowly to release any residual pressure.
- Locate the water pump drain bolt. For the 2000 CR500, this is on the lowest point of the water pump cover (typically the lowest bolt on the right side). Place your drain pan underneath.
- Remove the drain bolt and crush washer. Allow the old coolant to drain fully.
- For a thorough flush: Reinstall the drain bolt (with a new crush washer) and refill the system with distilled water, then run the engine for several minutes at idle with the radiator cap off. Shut down, cool, and repeat the drain process until water runs clear. This extra step is especially valuable if your CR500 has seen mud/debris or you are switching coolant types.
- Tighten the drain bolt with a new crush washer. Do not overtighten as the aluminum is soft. Typical torque is around 9-10 ft-lbs.
- Refill the radiator with fresh ethylene glycol-based coolant. Pour slowly with a funnel to prevent air bubbles until the fluid reaches the filler neck.
- Start the engine and let it idle for several minutes with the cap off. Watch for air bubbles escaping. Gently rock or lean the bike side-to-side to help purge remaining air.
- Top off coolant as needed, then securely reinstall the radiator cap.
- Check the coolant expansion tank (if equipped) and fill to the specified marks between “Low” and “Full”.
- Inspect for leaks. Wipe down any spills from the motor, hoses, and radiator area.
Important Notes Specific to the 2000 Honda CR500
- Always use ethylene glycol-based coolant – this is the only safe type for the CR500's aluminum radiators to prevent corrosion.
- The CR500 is notorious for vibration and heat; regularly check for loose coolant hoses or mounting clamps after rides.
- Inspect the radiator cap and overflow system frequently; cracks or poor seals are a common cause of overheating in high-rpm riding.
- If your bike has been stored for a season, flush the system before start-up as coolant can deteriorate and promote corrosion or deposits.
- Use a new crush washer every time you remove the drain bolt to ensure a leak-free seal.
- Dispose of old coolant responsibly. Coolant is toxic to people and animals–never pour it down the drain or onto the ground.
Final Checks
- Confirm the coolant level after your first ride, topping off if necessary.
- Monitor temperature and be alert for any steam or wetness around the cooling system during your next few rides.
With proper care, your 2000 Honda CR500 will stay cool and run strong, letting you focus on the ride. MotoSport is here to support your passion – whether you need fresh coolant, crush washers, or performance upgrades.
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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.