How to Change the Coolant in a 2012 Honda CRF250R: MotoSport's Guide
Shop parts for a 2012 Honda CRF250R Dirt Bike.If your 2012 Honda CRF250R is due for fresh coolant, a smooth and safe engine is just a service away. Changing coolant keeps your bike running cool and extends its lifespan—vital for a high-revving motocrosser like this Honda. Follow this MotoSport-exclusive guide for all owners of the 2012 CRF250R.
What Makes the 2012 CRF250R Coolant System Unique?
The 2012 CRF250R uses a high-efficiency, twin-radiator system designed for aggressive riding. Its compact four-stroke engine relies on a pressurized cooling circuit. Always use a high-quality, glycol-based coolant suitable for aluminum engines, and note the specific capacity: 0.98 US qt (0.93L) at a coolant change, or 1.06 US qt (1.00L) when empty after a full disassembly.
Tools & Supplies Needed
- Phillips screwdriver (to remove shrouds, if needed)
- 8mm socket or wrench (for water pump bolt)
- Drain pan
- Fresh coolant (glycol-based, pre-mixed or with distilled water)
- Funnel
- Shop towels
- New copper sealing washer for drain bolt (recommended)
Step-by-Step Coolant Change Process
- Cool Down the Engine
Never attempt to service the cooling system when hot. Allow the engine to reach room temperature to avoid burns or dangerous coolant spray. - Remove the Radiator Cap
With the engine cool, slowly loosen and remove the radiator cap to release any pressure. If needed, carefully remove any bodywork for easier access. - Drain the Old Coolant
Place your drain pan under the water pump. Locate the coolant drain bolt (usually at the lowest water pump position on the right side of the engine) and remove it with an 8mm socket. Also, open the radiator cap fully to help coolant flow out quickly. - Inspect & Clean
Check the old coolant for debris or oil contamination—signs of possible internal issues. Clean any residue from the drain hole, and inspect the sealing washer. Replace the washer if damaged. - Reinstall the Drain Bolt
Refit the drain bolt with a fresh copper washer. Torque it to 10 Nm (7.4 lb-ft) for a proper seal. - Add New Coolant
Pour coolant into the radiator slowly using a funnel. Fill to the bottom of the filler neck. For concentrated coolant, mix with distilled water as specified. - Remove Air Pockets
Gently rock the bike side to side to allow trapped air to escape; you may notice the coolant level drop. Continue filling to the bottom of the filler neck as needed. - Start the Engine & Recheck
With the radiator cap off, briefly start the engine and let it idle for a minute. This helps circulate the new coolant and purge air bubbles. Shut the motor off, allow to cool, and top off coolant if necessary. - Secure the Radiator Cap
Install the radiator cap firmly, ensuring it locks in place. If the cap is not installed securely, you risk coolant loss and potentially serious overheating. - Final Checks
Confirm that there are no leaks around the drain bolt and that the coolant level remains steady after the first ride. Expect normal loss of a small amount (0.7–2.0 US oz) through the overflow, but larger losses require further inspection.
Special Tips for 2012 CRF250R Owners
- Frequent check-ups: Always inspect your coolant level before riding. Overfilling will cause the system to vent excess coolant through the overflow tube.
- Correct coolant type: Only use coolant approved for aluminum motorcycle radiators; avoid automotive coolants with silicates that can damage your CRF's water pump and seals.
- Maintain your radiator cap: A weak or faulty cap can cause boil-over, so replace if it no longer seals tightly.
By maintaining the cooling system, you prevent expensive top-end damage and get the most out of your 2012 Honda CRF250R's performance on any track or trail.
Related Shopping Categories
Shop Radiators for a 2012 Honda CRF250R Dirt Bike.
Shop Coolant for a 2012 Honda CRF250R Dirt Bike.
Shop Temperature Sensors for a 2012 Honda CRF250R Dirt Bike.
Shop Tools for a 2012 Honda CRF250R Dirt Bike.
Shop Radiator Hoses for a 2012 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.