How to Change the Coolant in a 2023 Yamaha TTR110

Shop parts for a 2023 Yamaha TTR110 Dirt Bike.

Keeping your 2023 Yamaha TTR110 running at peak performance means routine maintenance–like changing the coolant–is crucial. Proper coolant care helps prevent overheating, protects internal engine passages from corrosion, and extends the life of your dirt bike. Here is a step-by-step MotoSport-exclusive guide for changing the coolant in your TTR110, with helpful notes specific to this popular MMY dirt bike.

Before You Begin

  • Coolant Type: Always use a high-quality, motorcycle-specific coolant compatible with aluminum engines.
  • Engine Condition: Perform this job with the engine stone cold to avoid burns.
  • Work Area: Work on a level surface with the bike upright and secure.

Tools & Supplies

  • Socket wrench set (including 10mm or 12mm, check your specific drain bolt)
  • Drain pan
  • Funnel
  • Coolant hoses (for flushing if desired)
  • Motorcycle-rated coolant
  • Cleaning cloths
  • Distilled water (optional for flush)
  • Protective gloves

Step 1: Access the Cooling System

Remove the seat and plastics if needed to access the radiator cap and neck. The radiator is located at the front of the TTR110 engine. Place a drain pan underneath the water pump or cylinder base where the drain bolt is typically located.

Step 2: Drain the Old Coolant

  • Ensure the engine is completely cool.
  • Open the radiator cap to relieve any pressure.
  • Locate the coolant drain bolt on the water pump or lower side of the cylinder (see owner's manual for exact bolt).
  • Remove the drain bolt and allow all coolant to drain into the pan. Be sure to also remove the coolant overflow hose to fully drain the reservoir, if equipped.
  • After draining, reinstall the drain bolt using a new washer if required. Tighten to the manufacturer's specified torque. Avoid overtightening–stripped threads are a common pitfall.

Step 3: Flush the System (Optional but Recommended)

If your TTR110's coolant is discolored or the bike has seen lots of muddy rides, flush the entire cooling system. Fill with distilled water, reinstall the drain bolt, and run the engine briefly (about 1–2 minutes). Shut the engine off, let cool, then drain. Repeat until drain water runs clear.

Step 4: Add New Coolant

  • Slowly add coolant to the radiator neck using a funnel until it reaches the base of the filler neck. Fill the overflow reservoir to the correct line, if equipped.
  • Burbing the System: Gently squeeze top and bottom radiator hoses to release trapped air. Tilt the bike side-to-side (while secure) to help move any remaining bubbles.
  • Leave the radiator cap off. Start the engine and let it idle for 2-3 minutes to allow air to escape. Watch coolant level; top off as needed if it drops.
  • Turn the engine off, let the bike cool completely, then recheck the coolant level and top off the radiator and overflow bottle to specifications, if necessary.
  • Install and secure the radiator cap.

Step 5: Final Checks

  • Inspect for any leaks around the drain plug, hoses, and radiator.
  • After the next ride, let the bike cool and recheck coolant levels to ensure there weren't any residual air pockets released into the overflow.

Notes Specific to the 2023 Yamaha TTR110

  • The TTR110's compact chassis means coolant drain access can be tight–a funnel and a small catch pan make the job cleaner.
  • This model is often used by young riders–double-check torque specs and ensure every bolt is properly reinstalled as improper fitting can cause leaks or stripped threads.
  • Always keep children and pets away from drained coolant; it is highly toxic even in small amounts.
  • The TTR110 does not have a radiator fan, so monitoring coolant condition and maintaining coolant levels is especially important during slow-speed riding or hot weather.

Disposal

Collect all drained coolant and water for proper disposal in accordance with local regulations. Never pour coolant down household drains or onto the ground.

Conclusion

Changing your 2023 Yamaha TTR110 coolant regularly ensures your dirt bike stays running cool, even when the off-road adventures heat up. For genuine parts, replacement gaskets, recommended coolants, and tools engineered for your TTR110, trust MotoSport. 

Related Shopping Categories

Shop Radiators for a 2023 Yamaha TTR110 Dirt Bike.

Shop Coolant for a 2023 Yamaha TTR110 Dirt Bike.

Shop Temperature Sensors for a 2023 Yamaha TTR110 Dirt Bike.

Shop Tools for a 2023 Yamaha TTR110 Dirt Bike.

Shop Radiator Hoses for a 2023 Yamaha TTR110 Dirt Bike.

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.