How to Change the Coolant in a 2017 Yamaha PW50

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Changing the coolant on your 2017 Yamaha PW50 is an essential maintenance task to keep your mini dirt bike running reliably. While the PW50 is famously simple and uses an air-cooled, two-stroke engine (meaning it does not use liquid coolant like most modern dirt bikes), many new owners mistakenly look for a coolant change procedure. The Yamaha PW50 engine is air-cooled, so you do not need to change liquid coolant—there is no radiator or coolant system on this model.

Instead, regular maintenance focuses on the two-stroke oil system, spark plug, air filter, and overall engine health. Here are critical things every PW50 owner should know:

  • No coolant system: There is no radiator or water pump; the fins on the engine provide cooling as air passes over the cylinders.
  • Check two-stroke oil: Use only high-quality two-stroke oil in the injector system. Make sure the oil reservoir is always adequately filled.
  • Air filter care: Clean or replace the air filter frequently to avoid dust and debris entering the engine.
  • Spark plug maintenance: Check and replace the spark plug as needed for smooth running.
  • Adjust the throttle and limiter screws: For young riders, the throttle stop screw and power reduction plate allow parents to fine-tune control and power delivery.
  • Familiarize yourself with basic maintenance: Most repairs can be done with hand tools, a spark plug wrench, and proper oil supplies. Always review your owner's manual for service intervals and safety notes.

If your PW50 ever seems to overheat, check for restrictions around the cooling fins and make sure the engine isn't being run too hard or with a clogged air filter. Proper oil/fuel mixture is also important for engine longevity. You will never need to flush or replace liquid coolant, as the PW50 is not a liquid-cooled machine.

If you need to service other components or need replacement parts, Shop parts for a 2017 Yamaha PW50 Dirt Bike.

Summary: The 2017 Yamaha PW50 does not require a coolant change thanks to its air-cooled engine. Focus your maintenance routine on oil, air filter, and spark plug to keep this classic mini bike running for years to come.

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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.