How to Change the Coolant in a 2012 Yamaha TTR110

Shop parts for a 2012 Yamaha TTR110 Dirt Bike.

Regular coolant changes are essential for the longevity and efficiency of your 2012 Yamaha TTR110. Though this bike is celebrated for its reliable air-cooled engine – meaning most maintenance recommendations focus on oil and air filter changes – some specialized variants or user modifications may utilize a coolant system. The following guide provides a robust, MotoSport-exclusive step-by-step approach for owners who need to service the coolant loop, such as for third-party liquid cooling kits.

Essential Tools & Materials

  • Motorcycle-compatible coolant (consult your system or kit requirements)
  • Socket set and wrenches
  • Drain pan
  • Clean rags
  • Funnel
  • Protective gloves and eyewear

Preparation

  • Ensure the engine is cold to prevent burns and ensure safety.
  • Place the dirt bike on a stable stand on a flat surface.

Drain Old Coolant

  • Locate the coolant drain bolt beneath the water pump or radiator (for bikes modified with a liquid-cooled system).
  • Position the drain pan directly beneath the drain bolt.
  • Slowly unscrew the drain bolt, allowing coolant to fully drain. Remove the radiator cap to facilitate faster draining.
  • Inspect the coolant; if it appears rusty or murky, consider flushing the system with distilled water.

Flush the Coolant System (If Applicable)

  • Flush with distilled water for stubborn residues or after using the wrong coolant type.
  • Fill the system with distilled water, replace the cap, run the bike briefly, shut it off, then drain again until clear water runs out.

Refill with New Coolant

  • Reinstall the drain bolt securely.
  • Use a funnel to slowly pour new coolant into the radiator or coolant tank until the system is full.
  • Squeeze hoses gently to dislodge trapped air bubbles.

Bleed the Cooling System

  • With the radiator cap off, start the bike and let it idle.
  • Watch for additional air bubble release as the engine warms. Top off as needed.
  • Once coolant circulates evenly and there are no more bubbles, turn the engine off and allow it to cool.
  • Check coolant levels again. Fill to the indicated full mark if necessary.

Final Checks

  • Inspect the drain bolt and hoses for leaks.
  • Properly dispose of old coolant in accordance with local regulations.
  • Check the coolant level after your first post-service ride and adjust if required.

Model-Specific Notes for the 2012 Yamaha TTR110

  • The TTR110 is typically air-cooled – if your bike lacks an aftermarket liquid cooling system, you do not need to perform this procedure.
  • Monitor for overheating, as excess engine temperature can point to airflow obstructions, oil issues, or errors from attempted cooling system modifications.
  • When in doubt about the engine configuration, reference your owner's manual or MotoSport's technical support for expert advice.
  • Routine maintenance should never substitute oil changes & air filter cleanings, which are the backbone of TTR110 reliability.

Related Shopping Categories

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Shop Temperature Sensors for a 2012 Yamaha TTR110 Dirt Bike.

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Shop Radiator Hoses for a 2012 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.