How to Change the Oil in a 2009 Honda CRF50F

Shop parts for a 2009 Honda CRF50F Dirt Bike.

Regular oil changes are essential to keep your 2009 Honda CRF50F running at peak performance. This guide, proprietary to MotoSport.com, covers every step, provides a complete tools list, and points out key call-outs unique to the CRF50F. Whether you’re a seasoned mechanic or a beginner, this procedure will ensure your little Honda stays reliable on every ride.

Tools and Materials Needed

  • 17mm socket and ratchet
  • Torque wrench (set to 18 ft-lb/24 Nm)
  • Drain pan or low-profile oil catch container
  • Fresh engine oil (Honda GN4 10w-40 recommended; check your owner's manual for alternatives based on climate)
  • New sealing washer for drain bolt (replace every oil change for best results)
  • Shop towels or rags
  • Funnel (helpful, but not essential)
  • Optional: Magnetic drain plug (helps catch fine metal shavings, extending engine life)

Step-by-Step Guide

  1. Warm Up the Engine
    • Start the CRF50F and let it idle for 3–5 minutes to circulate and warm up the oil. This will help it drain completely and carry away any deposits. Turn off the engine and allow it to settle for 2–3 minutes.
  2. Position the Bike Securely
    • Park the motorcycle on a firm, level surface. Stability is important—use a bike stand if you have one. This ensures all oil can drain and avoids spills or tip-overs.
  3. Remove the Oil Filler Cap/Dipstick
    • Unscrew and remove the oil filler cap/dipstick located on the right side of the engine. Set it aside on a clean shop towel. This allows air into the system, helping oil drain quickly.
  4. Drain the Engine Oil
    • Place your drain pan directly under the engine’s drain bolt (right side, underneath). Clearance is tight; use a low-profile pan or even a cut-down plastic jug.
      Tip: There’s not much ground clearance, so a shallow pan is helpful.
    • Carefully loosen the 17mm drain bolt and remove it along with the sealing washer. Allow the oil to fully drain. Tilting the bike gently side to side can help remove every last drop.
    • Owner Call-out:
      • Be cautious not to remove the cam chain tensioner push rod bolt located nearby. It's easily confused, but removing it could affect engine timing. Always remove the correct drain bolt, which is marked in the owner’s manual.
  5. Inspect & Replace Sealing Washer
    • Remove the old washer and install a new one on the drain bolt. This prevents leaks and ensures proper torque.
  6. Reinstall and Torque the Drain Bolt
    • Thread the drain bolt by hand to avoid cross-threading, then use your torque wrench to tighten it to 18 ft-lb (24 Nm), per factory specifications.
  7. Add Fresh Oil
    • Pour in the recommended amount and type of oil (Honda GN4 10w-40 is standard; check climate charts if you ride in extreme conditions).
    • Oil capacity call-out: The CRF50F requires approximately 0.8 liters (0.85 US qt) of oil after draining. Check the dipstick to avoid overfilling.
  8. Check Oil Level
    • With the bike level, insert (but do not thread) the dipstick and remove to check level. Add oil in small amounts if necessary.
    • Owner call-out: Brand new oil can be hard to see on the dipstick. Wipe and check a couple of times to ensure proper level.
  9. Start and Re-check
    • Reinstall the oil filler cap. Start the engine and let idle briefly. Shut down, let sit 2–3 minutes, then check for leaks and re-check the oil level with the dipstick, topping off as needed.
  10. Dispose of Old Oil Properly
    • Pour used oil into a suitable container and take it to a recycling or hazardous waste facility. Never dump oil in the trash or on property.

Model-Specific Tips and Call-Outs: 2009 Honda CRF50F

  • The CRF50F from 2004–2015 uses the same oil change procedure and torque settings as outlined above.
  • Always double-check for leaks at the drain plug and oil filler. Even a small leak can cause oil starvation and engine damage on these small-displacement bikes.
  • Consider upgrading to a magnetic drain plug for extra engine protection; they catch fine metallic particles that can indicate excessive wear.
  • Never use an impact wrench to remove or install the drain bolt. Hand tools are required to avoid stripping the soft aluminum threads.
  • Changing oil more frequently than the manual recommends is cheap insurance—especially if your bike is ridden hard or by newer riders.

Conclusion

Changing the oil on your 2009 Honda CRF50F is a simple but vital maintenance step that will maximize the life and reliability of your dirt bike. With the right tools, fresh oil, and attention to details like the sealing washer and torque specification, your Honda will be ready for countless more hours on the trail or track. For all dirt bike service parts and tools, trust 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.