How to Change the Oil in a 2023 Honda CRF450R-S: A Step-by-Step Guide

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Tools & Supplies Needed

  • 8mm socket
  • 10mm socket
  • Ratchet
  • Torque wrench
  • Drain pan
  • Funnel
  • Honda CRF450R-S oil filter
  • Honda 20W-50 four-stroke motorcycle oil (or recommended grade for your climate)
  • New crush washer (always replace to prevent leaks)
  • Replacement O-ring for oil filter cover (if damaged)
  • Clean rags and nitrile gloves
  • Contact cleaner (optional) for any spills
  • Measuring cup for accurate oil fill
  • Safety goggles

Step-By-Step: Changing Oil on Your 2023 Honda CRF450R-S

  1. Warm Up the Engine
    • Start your CRF450R-S and let it run at idle for about 1 minute. This warms the oil and helps it flow out faster and more completely.
  2. Remove Engine Guard (If Equipped)
    • Use your sockets and ratchet to remove the left engine guard for easier access to the oil filter cover and drain bolt .
  3. Take Off Oil Filler Cap
    • Twist off the oil filler cap on the right side. This allows air into the crankcase, speeding up drainage .
  4. Drain Old Engine Oil
    • Locate the oil drain bolt (10mm) at the lower rear of the crankcase.
    • Place your drain pan underneath, then remove the bolt and the crush washer. Let the oil drain completely.
    • Inspect and replace the crush washer with a new one to prevent leaks . Discard the old oil properly according to your local regulations.
  5. Remove the Oil Filter
    • Unbolt the oil filter cover (8mm socket). On the 2023 CRF450R-S, two bolts secure the cover–note that they are different lengths: the longer bolt goes at the bottom, the shorter at the top .
    • Hold the cover as you remove the last bolt; there is a spring inside that may push the cover out slightly.
    • Remove the cover gently, set the spring aside, and pull out the old oil filter.
    • Inspect the O-ring on the cover and the filter spring. Replace the O-ring if it's damaged or excessively flattened .
  6. Clean the Area
    • Use a clean, lint-free rag to wipe away any residue or debris from the oil filter housing and surrounding surfaces. Remove any metal flakes; this is normal for new engines, but alert your dealer if you see large chunks .
  7. Install the New Oil Filter
    • Lightly oil the new filter's rubber sealing ring with clean engine oil.
    • Install the filter (open end facing outwards) and reposition the spring and cover.
    • Insert the two bolts, ensuring the longer bolt is at the bottom and the shorter at the top. Tighten both evenly, torqueing to 9 ft-lbs as specified by Honda .
  8. Reinstall Drain Bolt and Engine Guard
    • Fit the new crush washer on the drain bolt and reinstall the bolt into the crankcase. Tighten to factory torque spec (refer to owner's manual).
    • Reinstall the left engine guard using your 8mm and 10mm sockets .
  9. Add Fresh Engine Oil
    • With the bike upright and level, use a funnel to pour in the recommended amount of fresh Honda 20W-50 oil (refer to your owner's manual for the exact capacity; typical fill is around 1.0-1.2 quarts for the CRF450R-S engine) .
    • Stop occasionally to check the sight glass on the right side of the crankcase. Oil should reach the center of the glass (not above).
    • Reinstall the oil fill cap once complete.
  10. Start and Inspect
    • Start the engine and let it idle for about one minute. Shut it down and let it sit for two minutes.
    • Check the oil level again through the sight glass; add oil if necessary to reach the correct level .
    • Inspect for oil leaks at the drain bolt and the oil filter cover.

Model-Year Specific Callouts: 2023 Honda CRF450R-S

  • The oil filter cover bolts are different lengths: always confirm the longer bolt goes at the bottom and the shorter at the top to prevent damage .
  • The crush washer and O-ring should be inspected every service; a leak at these points is common if not replaced .
  • Only use Honda-approved oil filters and the recommended 20W-50 oil to maintain engine longevity and warranty integrity .
  • Oil service intervals for the CRF450R-S: every 15 hours of riding or about every 6 races under normal conditions. More frequent changes are recommended for aggressive riders or harsh conditions .

Final Tips

  • Record the date, hour meter, and odometer at every oil change—this habit helps catch service intervals and impresses future buyers.
  • If you find abnormal amounts of metal shavings, consult your dealer for further inspection.
  • Always dispose of motor oil safely at a certified recycling center.
  • Store unused oil with the cap on, away from moisture and temperature extremes.

For factory Honda CRF450R-S oil filters, Tusk oil change kits, and more exclusive maintenance guides, trust MotoSport.com—where riders get ready.

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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.