How to Change the Coolant in a 2013 Honda CRF450R: MotoSport Guide
Shop parts for a 2013 Honda CRF450R Dirt Bike.
Keeping your 2013 Honda CRF450R running at peak performance means regular maintenance–and one crucial job is changing the coolant. The CRF450R's high-performance engine depends on a functional cooling system, especially during hard rides or at the track. Here's how to flush and refill your coolant, plus key advice every owner should know about their model.
What You'll Need
- Glycol-based motorcycle coolant (premixed or mix with distilled water, as advised)
- 8mm or 10mm wrench (for drain bolt)
- Drain pan
- New crush washer for the drain bolt (recommended)
- Clean funnel
- Gloves and shop towels
Step-by-Step Coolant Change Process
- Let the engine cool completely. Never work on the cooling system when the bike is hot to avoid burns and injury.
- Remove the radiator cap by turning it counterclockwise. This relieves pressure and allows the system to drain efficiently – the cap is on the right side of the tank – make sure the engine is fully cold first .
- Locate and remove the coolant drain bolt. On the 2013 CRF450R, the drain bolt is on the water pump cover (right side of the engine). Place your drain pan underneath.
- Remove the drain bolt; allow coolant to completely exit the system. Loosening the cap aids draining .
- Inspect the sealing washer and replace if worn or damaged to prevent leaks when reinstalling the bolt .
- Reinstall the drain bolt with new washer. Torque to 10 N·m (7 lbf·ft) for the engine guard bolt if removed ; torque specifications may differ for the drain bolt, so use the value indicated in your model's manual if available.
- Pour new coolant into the radiator until it reaches the bottom of the radiator filler neck. Use only motorcycle-specific, glycol-based coolant . For concentrated coolant, mix with distilled water as recommended by the coolant manufacturer.
- Reinstall the radiator cap securely–a loose cap can cause coolant loss and overheating .
- Start the engine and let it idle for a few minutes. This circulates coolant and helps clear air pockets. Stop the engine and allow it to cool fully.
- Remove the cap again and top off as needed. Repeat the process until the coolant stays at the correct level with the engine cool .
Final Checks & Inspection
- Inspect for leaks: Check hose, clamps, and the drain area for leakage.
- Make sure the radiator fins are clean and unclogged.
- Check that the overflow hose is properly routed and not kinked.
- Verify the water leakage check hole below the water pump is not weeping – this could indicate a failed seal .
Tips & Model-Specific Notes for the 2013 CRF450R
- The cooling system capacity is approximately 1.09 US qt (1.03 L) during a change .
- If your CRF450R is regularly subjected to aggressive riding in hot conditions, inspect coolant condition and level more frequently.
- Be sure the engine guard and any bodywork removed for access is reinstalled correctly and torqued as specified .
- Frequent coolant loss or overheating could signal issues with radiator caps, hoses, or water pump seals. Address these promptly to avoid engine damage.
- Never use tap water; minerals can corrode and clog internal passages.
Stay on top of your maintenance and your CRF450R will keep running cool and strong, whether you're hitting the moto track or the trails.
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.