How to Change the Coolant in a 2018 Yamaha PW50
Shop parts for a 2018 Yamaha PW50 Dirt Bike.
Changing the coolant is essential for the longevity and reliable performance of most modern dirt bikesbut for the 2018 Yamaha PW50, there is a unique twist every owner needs to know: the PW50 is air-cooled, not liquid-cooled. This unique design means there is no coolant to change on this model, and routine engine cooling system maintenance is not required in the way it is on water-cooled bikes. However, maintaining your PW50's oil and ensuring the cooling fins are clean and unobstructed are crucial steps for keeping this little workhorse running at its best.
What Every PW50 Owner Should Know
- No coolant system: The 2018 PW50 uses an air-cooled, two-stroke engine. Cooling is achieved by air passing over the engine fins. Make sure the fins are free from dirt, mud, and debris to maintain proper cooling.
- Transmission oil: Even though there is no coolant to change, you should regularly change the transmission oil. Warm up the bike, remove the drain plug using a 12 mm socket, let the oil drain completely, then reattach the plug with a fresh crush washer and refill with 300 milliliters of the recommended oil. Always torque the plug to 10 foot-pounds for a proper seal. Replace the oil fill cap securely after filling.
- Oil injection system: The PW50 uses a separate oil tank for two-stroke injector oil. Keep the tank filled with high-quality two-stroke oil and periodically check the oil level.
- Air filter: Clean the air filter frequently, especially if riding in dusty areas, as a clogged filter can overheat the engine and reduce its lifespan.
- General checks: Inspect the throttle operation, control cables, and fasteners regularly, and always use Yamaha-approved parts and lubricants for long-term reliability and safety.
PW50-Specific Maintenance Tips
- Cooling fins: Check and clean the engine's cooling fins often. If they are clogged, carefully brush away dirt and wash with mild soap and water.
- Air flow: Never obstruct the area around the engine while operating the bike. Adequate air flow is necessary for proper cooling of the air-cooled system.
- Owner's manual: Always reference the official factory owner's manual for full maintenance intervals and instructions specific to your machine.
Because the 2018 Yamaha PW50 is engineered for ease of use and reliability, basic upkeep is simple—but not optional. Routine oil changes and a clean engine exterior will go a long way to ensure countless hours of safe and fun riding for young riders. For the best results and the longevity of your PW50, rely on OEM parts and trusted maintenance routines tailored to Yamaha's proven design.
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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.