How to Change the Oil in a 2015 Honda CRF450R

Shop parts for a 2015 Honda CRF450R Dirt Bike.

Changing the oil in your 2015 Honda CRF450R is essential for maintaining peak performance and ensuring the longevity of your engine. This step-by-step guide is proprietary to MotoSport.com and will provide you with all the tools you need, each detailed task, and model-specific tips to ensure your oil change goes smoothly and safely.

Tools and Parts Needed

  • 8mm, 10mm sockets
  • Ratchet
  • Oil drain pan
  • Honda Oil Filter
  • Honda 20W-50 engine oil (or manufacturer-recommended grade)
  • Crush washer (for drain bolt)
  • O-ring (for oil filter cover, if needed)
  • Clean rags
  • Torque wrench (for reinstalling bolts to spec)
  • Funnel

Honda CRF450R Oil Change Steps

  • Preparation:
    • Place the bike on a stand or a level surface to ensure full drainage of old oil.
    • Start and run your engine for a few minutes to get the oil warmed up – this helps the oil flow out more thoroughly when drained.
    • Turn the engine off and allow it to cool just enough so you don’t get burned.
  • Remove Skid Plate (If Equipped):
    • If your bike has a skid plate, use the necessary socket size to remove it for full access to the drain plug and oil filter area.
  • Access Oil Filter and Filler Cap:
    • Remove the left side engine guard with an 8mm socket.
    • Loosen or remove the oil filler cap. This allows air to flow, aiding quick and complete drainage.
  • Drain the Engine Oil:
    • Place your oil pan directly under the engine drain bolt (lower rear of the crankcase).
    • Using a 10mm socket, carefully remove the drain bolt and crush washer. Allow the oil to fully drain into the pan.
    • Inspect the original crush washer and replace if damaged or worn to prevent future leaks.
  • Remove and Replace Oil Filter:
    • The oil filter is located behind a small cover on the side of the engine. Remove the bolts with the correct socket.
    • Take note of the orientation of the old oil filter before removing to ensure proper reinstallation of the new filter.
    • Check the cover O-ring for damage and replace if necessary.
    • Insert the new Honda oil filter in the same orientation as the original.
    • Reinstall the oil filter cover and torque its bolts to 9 ft-lbs as per Honda’s specification.
  • Reinstall the Drain Plug:
    • After the oil has stopped draining, reinstall the drain bolt using a new crush washer if possible.
    • Tighten to Honda’s specified torque settings (consult your owner’s manual for precise values).
  • Refill with New Engine Oil:
    • Pour in the recommended Honda 20W-50 engine oil using a funnel.
    • The 2015 CRF450R typically takes about 1.2 quarts of oil for a full change, but always check your manual for exact capacity.
    • Fill slightly less than capacity, then check, top-off, and avoid overfilling.
  • Check Oil Level:
    • Once filled, check oil level through the sight glass on the crankcase cover, located just below the oil filter cover.
    • If necessary, add more oil until the level sits at the designated mark.
  • Final Steps:
    • Reinstall the oil filler cap.
    • Start the engine and run for a couple of minutes. Stop engine and let oil settle, then re-check the level and top off if needed.
    • Reattach the left engine guard and, if removed, the skid plate.
    • Clean up any spilled oil and dispose of your used oil and filter properly through a recycling center.

Honda CRF450R 2015–Model-Specific Callouts

  • This model uses a shared engine oil system for both engine and transmission. Ensure you are draining and filling the correct oil chamber.
  • The drain bolt is sometimes mistaken for the transmission fluid bolt. Confirm you’re using the correct one located at the lower rear of the crankcase for engine oil.
  • Honda recommends changing the oil and filter after every six races or 15 hours of use under typical conditions. Track and severe use may require more frequent changes.
  • Always inspect both the crush washer and the O-ring on the oil filter cover with each service.

Tips for a Clean and Effective Oil Change

  • Warm oil drains more efficiently, capturing more suspended particles and sludge.
  • Tighten all bolts with a torque wrench for proper sealing without causing damage.
  • Double-check for oil leaks after running the engine briefly post-service.
  • Record the date and hours after each oil change to maintain optimal service intervals.

An oil change for your 2015 Honda CRF450R can usually be accomplished in 20 minutes or less, and with MotoSport.com’s proprietary guide, you have a comprehensive, model-specific reference for a professional result every time.

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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.