How to Change the Coolant in a 2015 Honda CRF110F

Shop parts for a 2015 Honda CRF110F Dirt Bike.

Maintaining your 2015 Honda CRF110F is key to reliable performance on and off the trail. While many modern motocross bikes use liquid cooling, the CRF110F is air-cooledmeaning it does not have a traditional liquid engine coolant system. Instead, it uses cooling fins on the cylinder head and engine block to dissipate heat.

What you need to know:

  • The 2015 Honda CRF110F does not require coolant changes because it lacks a coolant radiator or water passages found in larger, liquid-cooled dirt bikes.
  • Your main regular maintenance for this model focuses on engine oil, air filter cleaning, chain lubrication, and checking other wear components.

Engine Oil Change – Essential for Air-Cooled Models

Since your CRF110F's air-cooled system depends entirely on oil for internal engine heat management, keeping the oil fresh is crucial to performance and engine longevity. Here's how to change the oil:

  1. Start and idle the engine for 3–5 minutes, then turn it off and wait 2–3 minutes for oil to settle.
  2. Place the bike upright on firm, level ground.
  3. Remove the oil fill cap/dipstick.
  4. Put a drain pan under the crankcase, unscrew and remove the drain bolt.
  5. Let the oil drain completely, gently tilting the bike side to side if necessary.
  6. Remove the old sealing washer and replace it with a new one on the drain bolt.
  7. Reinstall the drain bolt and tighten to 18 lbf·ft (24 N·m).
  8. Pour in approximately 1.1 US qt (1.0 L) of recommended oil.
  9. Install the oil fill cap/dipstick securely.
  10. Start the engine, idle for 3–5 minutes, then shut off and check oil level. Add more oil if required, avoiding overfilling.

Tips for the 2015 CRF110F:

  • Routinely inspect the cooling fins and keep them clean of mud or debris—air cooling effectiveness depends on free air flow.
  • Riding in heavy mud or slow speeds can cause the engine to run hotter; monitor for excessive heat.
  • Stick to the manufacturer's maintenance schedule for maximum reliability and safety.

While you may hear about coolant changes for other CRF models, rest assured the CRF110F's straightforward air-cooled design means one less maintenance item on your list. Focus on oil changes, air filter upkeep, and chain maintenance—and you'll keep your CRF110F ready for every ride.

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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.