How to Change the Coolant in a 2010 Yamaha TW200

Shop parts for a 2010 Yamaha TW200 Dirt Bike.

Changing the coolant in your 2010 Yamaha TW200 is a crucial part of regular maintenance, helping you avoid overheating and keeping the engine running at peak performance. The TW200's air-cooled single-cylinder engine utilizes a modest but efficient cooling system. Although less complex than liquid-cooled models, coolant maintenance is just as important, especially if you ride in hot or challenging environments or store the bike for extended periods. Here's a full guide tailored to your Yamaha TW200, ensuring safe and effective coolant replacement.

What You'll Need

  • Replacement coolant compatible with Yamaha dirt bikes (consult your owner's manual for type and capacity)
  • Distilled water (if performing a flush)
  • Drain pan
  • Socket set – ensure you have the correct size for drain bolt
  • Funnel
  • Protective gloves & eye protection
  • Clean rags

Preparation

  • Ensure the engine is completely cool before you begin to avoid burns and spills.
  • Park the TW200 on a flat, stable surface – a center stand or bike stand is ideal.
  • Remove any body panels or guards as needed to access the radiator and coolant reservoir.

Step-by-Step: Draining Old Coolant

  • Locate the radiator drain bolt under the bike (refer to your manual for the exact location on the TW200).
  • Position the drain pan under the bolt and slowly remove it, allowing old coolant to drain fully.
  • Note: Dispose of old coolant responsibly, as it is toxic to pets and the environment.
  • If you choose to flush the system, reinstall the drain bolt, fill the cooling system with distilled water, and run the engine briefly. Allow the engine to cool, then drain again. Repeat this process until the fluid runs clear.

Filling with New Coolant

  • Replace the drain bolt securely (install a new washer if needed to prevent leaks).
  • Slowly pour the recommended fresh coolant into the radiator until it reaches the base of the filler neck.
  • Check the coolant reservoir (if equipped) and fill to the upper fill line.

Burping the Cooling System

  • With the radiator cap off, start the engine and let it idle for several minutes. This allows air bubbles to escape – you may gently rock the bike side to side to help release trapped air.
  • If the coolant level drops during this process, top it off as needed.
  • Once air stops escaping and the level stabilizes, turn off the engine and allow it to fully cool.
  • Recheck the coolant level, filling again if necessary.
  • Secure the radiator cap and any removed panels.

Final Checks & Notes for TW200 Owners

  • Review your coolant level after the first few rides and top off if needed.
  • The TW200's engine is known for its rugged simplicity, but extended idling or slow-speed riding in hot conditions can still raise operating temperatures–fresh coolant helps prevent performance loss and avoids overheating.
  • If you notice repeated coolant loss or signs of leaks, inspect all hoses and the water pump, as the TW200's age may mean replacing original rubber components is prudent.
  • Always use non-silicate, phosphate-free coolant suitable for aluminum engines 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.