How to Change the Oil in a 2011 Honda CRF450R

Shop parts for a 2011 Honda CRF450R Dirt Bike.

Maintaining your 2011 Honda CRF450R with regular oil changes is key to optimal engine performance and longevity. This comprehensive, MotoSport.com–exclusive guide covers the tools you need, step-by-step instructions, and unique model-specific tips for the CRF450R.

Tools and Parts Needed

  • 8mm and 10mm sockets
  • Ratchet
  • Honda oil filter
  • Honda 20W-50 or 10W-40 motor oil (650ml engine side, 700ml transmission side)
  • Oil drain pan
  • Crush washer/sealing washer
  • New O-ring (for the oil filter cover, if needed)
  • Torque wrench
  • Clean shop rags
  • Stand (to keep your bike upright and level)
  • Funnel

Steps to Change the Oil and Oil Filter

  1. Warm Up the Engine
    Start the motorcycle and let it idle for about 3 minutes. This helps the oil warm and flow more easily, ensuring a more thorough drain.
    Tip: Shut it off and wait another 3 minutes for the oil to settle into the crankcase.
  2. Position the Bike Upright
    Place the bike on a stand to keep it vertical and stable on a level surface.
  3. Remove the Oil Filler Cap
    Unscrew the oil fill cap/dipstick from the left crankcase cover. This will allow air in and help the oil drain faster.
  4. Place the Oil Drain Pan
    Slide an oil drain pan under the engine to catch the used oil.
  5. Remove the Engine Oil Drain Bolt
    With a 10mm socket, loosen and remove the oil drain bolt and its crush washer from the lower rear of the crankcase. Let the oil drain completely.
    Pro tip: Inspect the old washer; always replace it with a fresh one to avoid leaks.
  6. Remove the Left Side Engine Guard (if equipped)
    Some CRF450Rs have a guard covering the oil filter cover—remove it using the 8mm socket.
  7. Remove the Oil Filter Cover
    Use the 8mm socket to take off the oil filter cover. Carefully remove the old oil filter and O-ring.
    Call-out: The cover is spring-loaded—be cautious so the spring and filter don't pop out unexpectedly.
  8. Install the New Oil Filter and O-ring
    Lightly oil the new O-ring and position it correctly in its groove. Insert the new oil filter, ensuring it is seated properly (correct orientation matters).
  9. Reinstall the Oil Filter Cover
    Bolt the cover back in place and torque the two bolts evenly to 9 ft-lbs (12 Nm).
  10. Reinstall the Drain Bolt
    Replace the crush washer, thread the bolt in by hand first, then torque snug (not overtightened).
  11. Refill with New Oil
    Using a funnel, pour in Honda 20W-50 (or 10W-40, especially in hot climates) engine oil. The engine side takes about 650ml, and the transmission side takes about 700ml.
    Specific Call-out: The 2011 CRF450R uses separate oil compartments for the engine and transmission. Always check the owner—s manual for up-to-date quantities and specifications.
  12. Check and Top Off Oil Level
    Wipe and reinsert the dipstick, then remove it again to check the oil level. It should be between the upper and lower marks. Add more oil if needed but do not overfill.
  13. Reinstall Oil Fill Cap/Dipstick
    Ensure the O-ring is in good condition; replace if necessary. Tighten cap securely.
  14. Run and Check for Leaks
    Start the engine and let it idle briefly. Shut it off and inspect for any leaks around the drain bolt and oil filter cover. Add oil as needed, and top off to the correct level.
  15. Properly Dispose of Old Oil and Filter
    Take spent oil and filter to a local recycling facility or automotive store.

2011 Honda CRF450R Specific Tips and Call-outs

  • Dual sump system: The 2011 CRF450R has separate oil compartments for the engine and transmission—do not mix oil types or overfill either side.
  • Filter orientation: Ensure the oil filter is installed in the correct direction to prevent engine damage. Pay attention to the spring on the filter cover; don't lose it.
  • Crush washer: Always replace it at each oil change to avoid leaks; worn washers are a common cause of seepage.
  • Oil type: While Honda recommends 20W-50, some owners in hot riding conditions prefer 10W-40 for improved viscosity at higher temperatures.
  • Measurement accuracy: Use a measuring cup or oil bottle with markings, as over- or underfilling can affect performance or lead to damage.
  • Inspection: Regularly check for leaks and inspect the old oil and filter for debris—metal shavings can be an early warning of engine wear.

Final Notes

  • Always refer to your owner's manual for specific torque values, oil specifications, and any updates from the manufacturer.
  • Record your oil change interval—Honda suggests changing after every six races or 15 hours of use, but aggressive riding or harsh conditions may require more frequent changes.

Armed with these tools and steps, your 2011 Honda CRF450R will be back on the trail or track with fresh oil and smooth performance—only at 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.