How to Change the Coolant in a 2020 Yamaha TTR125L: Essential Steps & Model-Specific Tips

Shop parts for a 2020 Yamaha TTR125L Dirt Bike.

Changing the coolant in your 2020 Yamaha TTR125L is a crucial part of maintaining engine performance and extending the life of your dirt bike. While Yamaha's TTR125L is air-cooled and doesn't use conventional liquid coolant like many larger, liquid-cooled bikes, it's important for owners to understand this distinction to avoid unnecessary service or purchasing the wrong fluids.

Key Note About the 2020 Yamaha TTR125L

The 2020 Yamaha TTR125L uses an air-cooled engine. Unlike liquid-cooled motorcycles, this model does not require regular coolant changes because it is designed without a radiator or coolant reservoir system. Instead, the engine relies on airflow to dissipate heat, making maintenance simpler and more cost-effective. If you're seeking to improve cooling, focus on keeping the cooling fins clean and unobstructed from mud, dirt, or debris.

Essential Maintenance Tips for Air-Cooled TTR125L Engines

  • Inspect and clean the engine cooling fins: After rides, especially in muddy or off-road conditions, check the cooling fins on the cylinder and head. Use a soft brush or compressed air to remove caked-on debris.
  • Maintain proper oil levels: Oil not only lubricates but also assists in cooling. Change the oil at your owner's manual intervals and use quality, manufacturer-recommended oil.
  • Avoid extended idling: Since the TTR125L is air-cooled, avoid letting the bike idle for long periods without airflow over the engine, as this can lead to overheating.
  • Check spark plug regularly: Overheating issues may show up as changes in the spark plug's color. Monitor it for signs of excessive heat.

If You're Upgrading or Servicing a Liquid-Cooled Yamaha

For those new to Yamaha dirt bikes and familiar with liquid-cooled systems, here's a generalized, proprietary MotoSport maintenance process for reference – but note, with the TTR125L, these steps are not applicable due to its unique air-cooled design:

  • Let the engine cool completely.
  • Remove radiator cap and locate the drain plug (if equipped).
  • Drain old coolant into a proper container for recycling – never pour into the ground or sewer system.
  • Flush the system with distilled water if necessary.
  • Refill with manufacturer-approved coolant and burp the system to release air pockets.
  • Check coolant level after running and cooling down the engine; top off as needed.

Again, remember: the 2020 Yamaha TTR125L requires attention to oil and airflow, not coolant.

Final Thoughts for TTR125L Owners

The TTR125L's air-cooled segment sets it apart in simplicity and durability. Focus your routine maintenance on cleaning, proper oil care, and good airflow. If you're in need of replacement parts or maintenance supplies – from air filters to spark plugs – rely on trusted sources specifically tailored to the 2020 Yamaha TTR125L for best results.

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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.