How to Change the Coolant in a 1990 Yamaha TW200

Shop parts for a 1990 Yamaha TW200 Dirt Bike.

The 1990 Yamaha TW200 is a legendary dual-sport with an air-cooled, single-cylinder engine. However, unlike many modern motorcycles, the TW200 does not use a liquid-cooled system and does not require conventional coolant changes. Instead, it relies on air cooling and oil for temperature regulation. If you are referencing "coolant," you may be referring to the engine oil, which plays a critical role in heat dissipation on this model.

For typical motorcycles that use coolant, proper maintenance involves:

  • Allowing the engine to cool completely before starting any work.
  • Draining the radiator and the overflow reservoir by removing the drain bolt and hoses, ensuring all old coolant is removed. On air-cooled models like the TW200, this step does not apply, but you should check and change the engine oil regularly.
  • If there is a reservoir, removing and cleaning it if dirty, then reinstalling it once clean.
  • Refilling the system (or in the case of TW200, the engine) with the proper lubricant or fluid, ensuring you use only the type recommended in your owner's manual.
  • Running the engine and checking for proper operating levelstypically for liquid-cooled bikes, this would involve burping the system to eliminate air; on the TW200, ensure the oil level is correct once the bike is warmed up and has been shut down.

Important Note for TW200 Owners

  • Your 1990 Yamaha TW200 uses an air-cooled engine; there is no radiator, water pump, or coolant to change.
  • Maintain your cooling system by regularly checking your engine oil level and condition.
  • Keep the engine fins clean and unobstructed for maximum air flow – this is critical to avoid overheating.
  • If you notice high running temperatures or sluggish performance, inspect the oil and cooling fins before riding. Oil changes are typically recommended every 1,500 to 2,500 miles, or after particularly harsh or dusty rides.
  • Always use the appropriate viscosity and type of oil for your climate and riding style.

For TW200 owners, focusing on proper oil maintenance and keeping the cooling fins debris-free is key to long engine life. If you need oil change supplies, filters, or replacement parts for your Yamaha, MotoSport has you covered with quality OEM and aftermarket products.

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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.