How to Change the Coolant in a 2025 Yamaha TTR110: A MotoSport Guide

Shop parts for a 2025 Yamaha TTR110 Dirt Bike.

Keeping your 2025 Yamaha TTR110 running cool is essential for performance and engine longevity. Coolant change is a crucial maintenance task that prevents overheating and corrosion inside your bike’s engine. Here’s a proprietary MotoSport step-by-step guide tailored for the TTR110 owner.

Tools & Materials You’ll Need

  • Fresh, high-quality motorcycle coolant
  • Drain pan
  • Sockets or appropriate wrench for engine drain bolt
  • Funnel
  • Shop rags
  • Protective gloves

Before You Begin

  • Perform coolant changes with the bike completely cool to prevent burns or injury.
  • Work in a well-ventilated area—avoid inhaling fumes.
  • Double-check your owner’s manual for the recommended coolant; never mix types.

Draining the Old Coolant

  • Ensure the TTR110 is parked on a stable, level surface.
  • Remove the radiator cap slowly to release any pressure.
  • Locate the coolant drain bolt (commonly located on the lower side of the engine case).
  • Place your drain pan beneath the drain bolt, then remove the bolt and allow all coolant to drain completely.
  • Open the coolant reservoir cap or overflow drain if equipped to speed up drainage.
  • Inspect the old coolant—if it is heavily rusted or contaminated, consider flushing the system with distilled water before refilling.

Refilling with New Coolant

  • Reinstall the drain bolt securely. For best results, use a new washer if required by the manufacturer.
  • Pour the recommended coolant mixture slowly into the radiator or designated fill neck using a funnel.
  • Fill to just below the radiator filler neck (or to the ''Full'' line on the overflow bottle, if equipped).
  • Gently squeeze the upper and lower coolant hoses several times to help air bubbles escape–this is important to prevent air pockets that can cause overheating.
  • Allow the bike to sit for a few minutes, then top off fluid as needed.

Burping the System & Final Checks

  • Start the TTR110 and let it idle with the radiator cap off for several minutes, monitoring coolant level and checking for escaping air bubbles.
  • When bubbling stops, top off coolant as needed and replace the cap securely.
  • Check for leaks around the drain bolt and hoses.
  • After a brief test ride, let the engine cool and recheck coolant level, topping off if necessary.

Model-Specific Notes for the 2025 Yamaha TTR110 Owner

  • The TTR110 engine is engineered for reliability, but routine maintenance is key to long-term performance–coolant should be changed according to intervals listed in your manual, or more frequently for hard trail riding or racing.
  • Inspect hoses and clamps during every coolant service; signs of wear or damage should prompt immediate replacement.
  • Periodically check for coolant contamination—milky or brown coolant can indicate internal engine issues that should be addressed promptly.
  • If your TTR110 is operated in muddy, dusty, or wet conditions regularly, increase your vigilance regarding cooling system integrity.

Stay ahead on maintenance for your 2025 Yamaha TTR110 with MotoSport’s selection of parts and accessories designed especially for your machine.

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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.