How to Change the Coolant in a 2009 Yamaha TTR110

Shop parts for a 2009 Yamaha TTR110 Dirt Bike.

The Yamaha TTR110 is a popular air-cooled dirt bike – it does not use a liquid cooling system and thus does not have coolant to change. Instead, it relies on air passing over its engine fins to dissipate heat. Regular maintenance is focused on engine oil, air filter, and basic mechanical checks rather than a radiator or coolant flush.

What TTR110 owners need to know:

  • No radiator or coolant system: Maintenance tasks involving fluids are limited to oil changes, not coolant flushes.
  • Engine oil and air filter: These are the most critical regular service points for ensuring engine longevity and performance.
  • Check service intervals: Follow Yamaha–s schedule for changing the oil and cleaning or replacing the air filter, especially if riding in dusty conditions.
  • Overheating: If you ever notice signs of overheating (loss of power, excessive engine noise), stop and allow the engine to cool, as this may indicate other issues like restricted airflow or oil problems.
  • Distinct technical feature: The air-cooled engine on the TTR110 makes ownership simple and lowers maintenance costs compared to water-cooled bikes.

If you are looking to flush and replace coolant, this process only applies to water-cooled motorcycles – the TTR110 does not require this task.

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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.