How to Change the Coolant in a 2018 Yamaha TTR110: A MotoSport Owner’s Guide

Shop parts for a 2018 Yamaha TTR110 Dirt Bike.

Keeping your 2018 Yamaha TTR110 in top condition includes regular maintenance, and coolant changes are essential for reliable performance and long engine life. While the TTR110 is known for its air-cooled engine designnot a liquid-cooled system like many larger dirt bikesit’s crucial for owners to recognize that there is no traditional liquid coolant system to replace in this model year. Instead, you should focus on monitoring oil temperature, proper oil changes, and overall engine cooling through unobstructed airflow.

Important Model Note: The Yamaha TTR110 (all model years, including 2018) uses an air-cooled four-stroke engine. This means you do not need to flush or refill any radiator or liquid coolant system, as found in many other dirt bikes. If you are searching for coolant maintenance, you may be referencing models such as the YZ or WR series, which do use liquid cooling systems.

For the TTR110, essential maintenance tasks that support proper engine cooling and performance include:

  • Cleaning the cylinder fins– Dirt buildup impedes heat dissipation. Use a soft brush to remove any debris from the cooling fins.
  • Changing engine oil regularly– Oil acts as both a lubricant and a heat transfer mechanism, so keeping it fresh is vital. Refer to your service manual for oil type and interval.
  • Inspecting the air filter– A clean air filter ensures optimal airflow, which is integral to engine cooling and performance.
  • Keeping the engine unobstructed– Don’t block the airflow paths around the engine with additional guards or luggage, as this can increase engine running temperature.

Pro Tip: Always let your TTR110 cool to ambient temperature before performing any maintenance. Even without traditional coolant, the engine retains heat that can cause injury during service.

If your TTR110 ever overheats or you suspect abnormal engine temperatures, verify oil levels, clean cooling fins, and ensure the air filter is maintained. If you’re performing maintenance on a liquid-cooled dirt bike and have reached this article by mistake, we recommend consulting the specific service manual for your particular make and model for accurate coolant replacement steps.

Trust MotoSport for genuine Yamaha parts and support whenever you want to keep your 2018 TTR110 running its best.

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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.