How to Change the Coolant in a 2008 Yamaha TW200

Shop parts for a 2008 Yamaha TW200 Dirt Bike.

Routine coolant changes are essential to keeping your 2008 Yamaha TW200 running cool and reliable, especially during intense trail sessions or hot summer rides. The TW200—known for its distinctive fat tires and bulletproof reliability—features a simple air-cooled engine. However, if your TW200 has been modified or if you are searching for general coolant changing procedures (note: the stock TW200 is air-cooled and does not feature a liquid cooling system), the following steps are applicable for Yamaha and similar dirt bikes with radiators. It is critical to always check your owner‘s manual to confirm if your specific model uses liquid cooling or requires just an oil change and proper airflow for cooling purposes.

Preparation

  • Let the engine cool completely before beginning.
  • Place the bike on a stable stand and gather a catch pan, gloves, rags, and the appropriate pre-mixed coolant. For Yamaha engines, use only coolant that is aluminum-safe and never mix coolant types or use tap water as it causes mineral deposits.

Drain the Old Coolant

  • Remove the radiator cap to relieve pressure.
  • Locate the coolant drain bolt (often at the base of the water pump or radiator) and place a catch pan underneath.
  • Remove the drain bolt and allow all coolant to fully drain. Some models have a bleed bolt on the cylinder head–remove it for complete drainage.
  • If equipped, remove the expansion tank and drain any remaining coolant from it as well.

Flush the System (If Needed)

  • If there is sediment or old coolant residue, flush the system with distilled water. Replace the drain bolt temporarily, fill the system with water, run the engine briefly, then drain again.

Refill with New Coolant

  • Install a new sealing washer on the drain bolt, reattach it, and torque to spec.
  • Slowly pour in coolant at the filler neck to avoid trapping air bubbles. Gradually fill to the top of the neck.
  • Top up the expansion tank (if equipped) to the upper fill line.

Burp the System

  • Start the engine with the radiator cap off, idling for a few minutes while gently blipping the throttle. Watch for trapped air bubbles escaping.
  • Once the system burps, shut down the engine and top up the coolant if the level has dropped.
  • Replace the radiator and expansion tank caps securely.

Final Checks

  • Let the engine cool completely, then double-check coolant levels in both radiator and reservoir.
  • Dispose of old coolant properly; never pour down a drain.
  • Reinstall any removed panels.
  • Monitor fluid levels during your next few rides to confirm stable levels.

Special Considerations for the 2008 Yamaha TW200

  • The stock TW200 engine is air-cooled: You do not need to change coolant unless you have an engine swap or aftermarket liquid cooling conversion.
  • Cooling system maintenance: For air-cooled models, focus on oil changes and keeping the cooling fins clean and free of mud or debris.
  • Aftermarket mods: If your TW200 has a custom liquid cooling system, follow the steps above and always use Yamaha-compatible coolant to avoid corrosion or premature wear.

Whether maintaining the legendary simplicity of the TW200 or upgrading for specialized performance, regular cooling maintenance keeps your Yamaha running strong on any adventure.

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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.