How to Change the Oil in a 2014 Yamaha YZ250F

Shop parts for a 2014 Yamaha YZ250F Dirt Bike.

Regular oil changes are crucial for keeping your 2014 Yamaha YZ250F running at peak performance and extending engine life. Below, you'll find a robust, step-by-step guide proprietary to MotoSport.com, including a detailed list of the tools you need, specific tips for this model, and best practices to help you complete the job with confidence.

Tools and Supplies Needed

  • 8mm socket (for oil filter cover)
  • 10mm socket or wrench (for oil strainer bolt)
  • 12mm socket or wrench (for oil drain bolt)
  • Socket wrench with extensions
  • Drain pan (for used oil)
  • New oil filter (OEM or compatible like K&N 140)
  • New crush washer (always replace the washer on the drain bolt)
  • Fresh engine oil (Yamalube 10W-40 recommended)
  • Funnel (ideally with measuring marks)
  • Clean rags
  • Service manual (for reference and torque specs)
  • Gloves (optional but recommended for cleanliness)

Important Model-Specific Call-Outs

  • The 2014 YZ250F shares its oil change process with other recent YZ250F models, but note the drain bolt size and oil filter dimensions are model-specific.
  • Always use a high-quality oil filter that fits the 2014 YZ250F design – some newer models have different filters.
  • Check the oil level in the sight glass on the side of the engine; the oil should be between the two marks after a short run and rest period

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  • This model uses a separate bolt (10mm) for the oil strainer, which should be cleaned at every oil change

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Step-by-Step Oil Change Instructions

  1. Warm Up the Engine
    • Start the YZ250F and let it idle for 3-5 minutes. This warms the oil, allowing it to drain more fully and quickly

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  2. Secure the Bike
    • Shut off the engine. Place the bike on a stable stand so it is upright and secure.
  3. Remove the Skid Plate (if equipped)
    • Some models may have a skid plate. Remove it for clear access to the drain bolts

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  4. Drain the Oil
    • Locate the 12mm oil drain bolt underneath the engine case, near the frame rail on the left side

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    • Position the drain pan underneath, then loosen and remove the drain bolt. Let the oil drain completely.
    • Remove the oil filler cap on the top of the engine to improve drainage.
  5. Remove and Clean the Oil Strainer
    • Use a 10mm socket to remove the oil strainer bolt on the right side of the engine. Slide out and clean the oil strainer with a rag; replace if damaged

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  6. Replace Drain Bolt & Washer
    • Inspect and replace the crush washer on the drain bolt.
    • Reinstall and torque the drain bolt securely (refer to your service manual for the correct torque spec).
  7. Remove Oil Filter
    • Use an 8mm socket to remove the three bolts holding the oil filter cover on the right side of the engine.
    • Take off the cover, remove the old filter, and clean the filter cavity with a rag.
    • Check the condition of the O-ring on the filter cover and replace if necessary

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  8. Install New Oil Filter
    • Install the new filter. Ensure it is positioned correctly, matching any tabs or marks as shown in your manual

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    • Reinstall the oil filter cover and tighten the bolts evenly to avoid leaks.
  9. Add New Engine Oil
    • Use a funnel and pour in the recommended amount and type of oil (typically 1.0-1.05 quarts for a complete change, or check your service manual for the precise quantity for your riding style and filter selection).
    • Reinstall the filler cap when done.
  10. Restart and Check for Leaks
    • Start the engine and let it idle for a minute. Check around the drain bolt and oil filter for any sign of leaks.
  11. Check Oil Level
    • Turn off the bike and wait a few minutes for the oil to settle. Inspect the sight glass. The oil level should fall between the Min and Max markers

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    • Top off if necessary, being careful not to overfill.
  12. Dispose of Used Oil Properly
    • Take your used oil and filter to a recycling center or location that accepts motorcycle oil

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Expert Recommendations and Tips

  • Make *absolutely sure* to install a new crush washer on the drain bolt every time, as failure to do so can lead to leaks.
  • Inspect old oil for metal shavings, which could be a warning sign of internal wear.
  • Use the recommended Yamalube oil for peak engine longevity. Aftermarket oils may be compatible but always ensure they meet JASO MA/MA2 and API standards.
  • If you ride in extreme heat, dusty, or racing conditions, change the oil more frequently as severe use accelerates oil breakdown.
  • Cleaning the oil strainer at every oil change prevents debris from circulating in your engine.

Final Thoughts

Changing the oil in your 2014 Yamaha YZ250F is a straightforward maintenance task that takes about 30–60 minutes with basic tools. Doing this job regularly extends engine life, preserves performance, and prevents unexpected failures on and off the track.

All product recommendations, service tips, and model-specific insights are proprietary to MotoSport.com.

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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.