How to Change the Coolant in a 2016 Honda CRF150R
Shop parts for a 2016 Honda CRF150R Dirt Bike.
Regular coolant changes are critical to ensure your 2016 Honda CRF150R runs cool and reliably, whether you are hitting the track or tackling the trails. The CRF150R's high-performance, liquid-cooled engine depends on fresh antifreeze to prevent overheating and internal corrosion. Use this MotoSport guide for a safe, thorough coolant replacement on your specific model.
What You Need
- Silicate-free motorcycle coolant (pre-mixed or follow coolant manufacturer instructions)
- Distilled water (recommended for flushing)
- 8mm socket or wrench (for the water pump drain bolt)
- Drain pan
- Funnel
- Replacement copper or aluminum washer for the drain bolt (single-use recommended by Honda)
- Phillips screwdriver (if you need to remove the radiator shroud)
- Clean shop towels
Procedure for Changing CRF150R Coolant
- Make sure the engine is completely cool before you begin to avoid burns and pressurized coolant spray.
- Remove the radiator cap. The cap is on the left side, accessible after removing the left radiator shroud if necessary. Loosen and open the cap slowly to release any pressure.
- Place a drain pan under the water pump (located on the right side of the engine below the crankcase).
- Remove the coolant drain bolt. Use an 8mm socket to loosen the lowest bolt on the water pump coverthis is the coolant drain bolt. Be prepared for coolant to flow out; allow it to drain fully, tilting the bike slightly if needed for complete drainage.– The bolt will have a copper or aluminum washer that should be replaced at each service to ensure a proper seal.
- Flush the system (recommended but optional). Replace the drain bolt temporarily and fill the radiator with distilled water. Reinstall the radiator cap, run the engine for a minute, then repeat the drain process to clear out old coolant or debris. Do not use tap water, as minerals can damage the system.
- Reinstall the drain bolt with a fresh washer, tightening it to spec (typically just snug plus a quarter-turn; do not overtighten).
- Fill the radiator with fresh coolant. Pour coolant slowly to avoid air pockets. Fill to the base of the cap neck.
- Burb the system by gently rocking the bike to release trapped air or briefly running the engine with the cap off. Top off coolant as needed until fully filled.
- Reinstall the radiator cap securely.
- Wipe away spills with shop towels and wash off any residue, as coolant is slippery and can damage some finishes or attract dirt.
- After your first ride, recheck coolant level. Coolant may drop as residual air escapestop off if needed.
- Dispose of old coolant safely according to local regulations, as it is toxic to animals and the environment.
2016 CRF150R: Key Notes for Owners
- The CRF150R is race-derived, making coolant quality especially important, as the engine operates at high RPM and temperatures for a 150cc bike.
- Never use tap water in the cooling system. Always use distilled water when flushing, and only use silicate-free coolant, as silicates can damage the lightweight aluminum components.
- Inspect hoses and radiator during every coolant change. Check for cracks or leaks and replace any worn parts before refilling, as leaks can rapidly cause engine damage.
- Although Honda recommends changing coolant every two years, riders in extreme environments or racers should change coolant more frequently for best protection.
Keeping your 2016 CRF150R's cooling system in top shape ensures maximum power and longevityrefer to MotoSport for all genuine Honda parts and coolants, matching your bike perfectly each time.
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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.