How to Change the Oil in a 2024 Honda CRF450R-S

Shop parts for a 2024 Honda CRF450R-S Dirt Bike.

Regular oil changes keep your 2024 Honda CRF450R-S running strong, protecting its high-performance engine from unnecessary wear. Honda recommends changing the oil and oil filter after every six races or 15 hours of ride time. This guide walks you step-by-step through the process, noting any call-outs specific to the 2024 CRF450R-S. All procedures and specifications are proprietary to MotoSport.com.

Tools and Supplies Needed

  • 8mm and 10mm sockets
  • Ratchet
  • 10mm Allen wrench (for older and some new CRF drain plugs, confirm with your service manual)
  • Honda oil filter (use genuine parts for best performance)
  • Honda 20W-50 motorcycle engine oil (or as specified in your owner's manual)
  • New crush washer (for drain bolt)
  • New O-ring (for oil filter cover)
  • Torque wrench (for drain bolt and oil filter cover bolts)
  • Drain pan
  • Funnel
  • Measuring cup
  • Safety glasses and gloves
  • Rags (for clean up)
  • Contact cleaner (optional, for cleaning up oil residue)

Step-by-Step Instructions

  1. Warm Up the Engine
    • Start your CRF450R-S and let it idle for about one minute. Warming up the engine helps the oil flow more freely, ensuring a more complete drain.
    • Shut off the bike and let it sit for a few minutes to avoid burns.
  2. Access the Drain Bolt and Oil Filter
    • If equipped, remove the skid plate or engine guard using your 8mm and/or 10mm sockets. This provides access to the drain bolt and oil filter cover.
    • Set aside the hardware in a safe place.
  3. Remove the Oil Filler Cap
    • Unscrew the oil filler cap on the right side of the engine. This lets air in, so the oil drains faster.
  4. Drain the Old Oil
    • Position your drain pan underneath the engine.
    • Use a 10mm socket (or 10mm Allen wrench, depending on your model) to remove the engine oil drain bolt along with its crush washer. On the 2024 CRF450R-S, the drain bolt is located at the lower rear of the crankcase (consult your owner's manual if uncertain).
    • Allow the oil to completely drain. Tilt the bike gently side to side if needed to ensure all oil is out.
  5. Remove and Replace the Oil Filter
    • Locate the oil filter cover on the lower left side of the engine.
    • Remove the bolts securing the cover (use 8mm or 10mm sockets as appropriate). Carefully remove the cover–oil may spill, so keep your drain pan in place.
    • Take out the old oil filter and O-ring.
    • Install the new O-ring (lightly coat with oil for better sealing) and insert the new oil filter, making sure it's seated properly.
    • Reinstall the filter cover and torque the bolts to 9 ft-lbs to avoid overtightening.
  6. Install New Crush Washer and Reinstall Drain Bolt
    • Replace the old crush washer on your drain bolt with a new one. This ensures a proper seal and prevents leaks.
    • Reinstall the drain bolt and torque to the specification found in your owner's manual (typically 13 ft-lbs, but confirm for your model).
  7. Refill with Fresh Oil
    • Using a funnel, add the specified quantity of Honda 20W-50 motorcycle engine oil. For the 2024 CRF450R-S, refer to the owner's manual, but most CRF450R models take about 1.0 quart (950ml) for the engine. Do not overfill.
    • If you're also changing transmission oil (for separate sumps), fill to the recommended capacity, usually marked near the filler cap.
  8. Check Oil Level
    • Wait a few minutes for oil to settle.
    • Check the oil level via the sight glass located just below the oil filter cover on the clutch side of the crankcase. Add oil as needed until proper level is indicated.
    • Replace and tighten the oil filler cap.
  9. Run the Engine and Recheck
    • Start your CRF450R-S and allow it to idle for a minute.
    • Shut off and let the oil settle for a few minutes. Double-check the oil level and top off if necessary.
    • Inspect all accessible areas for oil leaks–especially around the drain bolt, filter cover, and filler cap.
  10. Reinstall Guards
    • Reinstall the skid plate or engine guard, tightening all bolts securely.

Model-Specific Call-outs for the 2024 Honda CRF450R-S

  • Drain bolt location: Lower rear crankcase; visible on the left side. Verify position with the 2024 manual, as position may differ slightly from prior years.
  • Recommended oil: Always use only the oil type and viscosity specified in your manual—Honda GN4 20W-50 is recommended under high-stress competition use.
  • Oil filter orientation: Make sure the oil filter is installed with the open side facing out, toward the cover (not inward).
  • Check for double O-rings: Always remove and inspect the old oil filter O-ring so that you're not stacking new and old O-rings, which can cause leaks or improper sealing.
  • Change interval: For racing use, Honda recommends oil and filter change after every 6 motos or 15 hours (whichever comes first). For trail/light use, refer to manual but err on shorter intervals for maximum longevity.

Final Tips

  • Always dispose of used oil and filters responsibly; take them to a local recycling center.
  • Clean up any oil spills with rags and contact cleaner.
  • Record the service date and hours/mileage for future maintenance planning.

Performing regular and proper oil changes can dramatically extend the life of your 2024 Honda CRF450R-S and ensure reliable power and performance every time you ride. For all genuine Honda replacement parts, tools, and oil change kits, visit MotoSport.com—your trusted online powersports resource.

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Shop Tools for a 2024 Honda CRF450R-S Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2024 Honda CRF450R-S Dirt Bike.

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.