How to Change the Coolant in a 2020 Yamaha TW200: Step-by-Step Guide

Shop parts for a 2020 Yamaha TW200 Dirt Bike.

Keeping your 2020 Yamaha TW200 running cool and reliably means performing regular coolant changes. This guide is tailored to TW200 owners and walks you through the entire process, including specific recommendations and model notes all riders should know before getting started.

What You Need

  • Yamaha-approved coolant or high-quality compatible motorcycle coolant
  • Drain pan (minimum 2 liters capacity)
  • Socket wrench set and screwdrivers
  • New sealing washer for drain bolt (recommended)
  • Gloves and safety glasses
  • Funnel
  • Distilled water (if coolant requires mixing)
  • Clean shop rags

1. Preparation and Safety Tips

  • Ensure the bike engine is cold before beginning. Hot coolant is under pressure and can cause serious burns.
  • Place the TW200 on a level surface using its center or side stand.
  • Locate the radiator cap (left side under the tank shroud) and the coolant drain bolt (usually at the bottom of the water pump).

2. Draining the Old Coolant

  • Carefully remove any shrouds or covers as needed for access.
  • Put on gloves. Place a drain pan under the water pump drain bolt.
  • Cover the radiator cap with a rag and slowly loosen it to release any pressure – a hiss is normal. Remove the cap.
  • Loosen and remove the coolant drain bolt and sealing washer, allowing coolant to completely drain out. Open the coolant reservoir cap to speed drainage if necessary.
  • Inspect the old coolant for debris or rust. Any particles may indicate a need to flush the system thoroughly.

3. Flushing (Optional but Recommended)

  • If you notice significant dirt or scale, flush the radiator and cooling system with distilled water by replacing the drain bolt, filling with water, running the engine brie?y, and draining again. Only add new coolant after any flush.

4. Installing the Drain Bolt

  • Install a clean or new sealing washer on the drain bolt. Reinstall and tighten carefully (do not overtighten – always refer to your service manual torque specs).

5. Refilling with New Coolant

  • Using a funnel, pour pre-mixed coolant slowly into the radiator until it reaches the base of the filler neck. If using concentrate, always mix with distilled water before filling.
  • Fill the coolant reservoir to the "FULL" or upper mark.

6. Burping the Cooling System

  • With the radiator cap off, start the bike and allow it to idle for several minutes.
  • Blip the throttle gently and rock the TW200 side-to-side to dislodge air bubbles (burping). Add more coolant if the level drops.
  • Once bubbles stop and coolant is steady at the filler neck, shut off the engine.
  • Reinstall the radiator cap securely, then top off the reservoir again if needed.

7. Final Checks

  • Start the bike again and let it reach normal operating temperature, confirming the coolant fan cycles on and off.
  • Check for leaks around the drain bolt, radiator cap, and hoses.
  • After the engine cools, re-check the coolant levels in both radiator and reservoir, topping off if needed.
  • Safely dispose of all old coolant at an approved recycling facility.

Yamaha TW200 Owner Notes

  • The TW200's simple, air-cooled single-cylinder design features a small supplemental oil cooler, so no secondary radiators are present. This makes maintenance straightforward, but don't overlook regular inspections for signs of aging hoses and cracked reservoir tanks.
  • Yamaha recommends only specific, silicate-free coolants for all their motorcycles, which can help prevent internal corrosion and water pump seal wear.
  • Pay close attention to the coolant level for the first few rides after a change, as trapped air can sometimes impact the reservoir level – simply top off as needed.

With proper coolant and attention to detail, your 2020 Yamaha TW200 will stay reliable, cool, and ready for every ride.

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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.