How to Change the Oil in a 2016 Honda CRF450X

Shop parts for a 2016 Honda CRF450X Dirt Bike.

Proper maintenance of your 2016 Honda CRF450X is paramount to keeping your dirt bike running at peak performance. Routine oil changes are especially vital. In this step-by-step guide, brought to you exclusively by MotoSport.com, you'll learn the precise process for changing your CRF450X's engine oil and filter, with specific tips and call-outs unique to the 2016 model year.

Tools and Supplies Needed

  • 8mm and 10mm sockets with a ratchet
  • 10mm Allen (hex) wrench
  • Oil drain pan
  • Honda oil filter (consult your owner's manual for OEM part number)
  • Crush washer or drain bolt gasket (always replace after each oil change)
  • O-ring(s) for filter cover
  • Honda 20W-50 engine oil (approximately 1.05 qt. – 1000ml for engine side)
  • Shop towels/rags
  • Torque wrench
  • Stand or lift (recommended for easier access and leveling)

Before You Begin

  • Warm up your engine for a few minutes to help the oil flow more easily. (Be cautious: hot engine parts and oil can cause burns.)
  • Place your CRF450X on a flat, stable surface or suitable stand.

Step-by-Step Oil Change Instructions

  1. Remove Engine Guards & Skid Plate (if equipped):
    • Use your 8mm or 10mm socket to take off the left side engine guard and skid plate to access the drain plug and oil filter cover.
  2. Remove Oil Filler Cap:
    • Unscrew the oil filler cap from the engine to allow air in and help the old oil drain more completely.
  3. Position Your Oil Drain Pan:
    • Set the drain pan beneath the engine. Make sure it's aligned with the oil drain plug (not the transmission drain plug, which is on the opposite side).
  4. Remove the Drain Bolt:
    • Using your 10mm socket or Allen wrench, carefully remove the engine oil drain bolt and crush washer from the bottom rear of the crankcase. Allow the old oil to drain fully. Inspect the old washer and bolt for wear or damage and replace the washer every time.
  5. Remove the Oil Filter Cover:
    • Take off the oil filter cover bolts (usually 8mm or 10mm). Remove the cover and used oil filter, being sure not to lose the O-ring and keeping track of bolt lengths and order.
    • Let residual oil drain from the filter housing. Wipe up any mess with a rag.
  6. Install New Oil Filter & O-ring:
    • Lightly oil the new filter's rubber seal. Replace the O-ring on the filter cover if it's damaged or missing.
    • Insert the new filter, ensuring the open end faces outward. Reinstall the cover and torque the bolts to Honda's specs (typically 9 ft-lb for filter cover bolts on CRF models).
  7. Reinstall the Drain Bolt:
    • Install a fresh crush washer onto the drain bolt, then torque the drain bolt to spec (consult your manual, but most CRF450X models call for 12 ft-lb).
  8. Refill Engine Oil:
    • Add Honda 20W-50 engine oil through the filler port. For a 2016 CRF450X, use just over 1 quart (≈1.05 qt. or 1000ml). If you're changing both engine and transmission oil, fill the transmission separately with Honda transmission oil to the correct specification (typically ≈750ml, but many owners use up to 950ml to extend lifespan–a common practice called out in owner forums).
  9. Check Oil Level:
    • Start the engine and let it idle for a minute. Then shut it off and let it sit for a couple minutes. With the bike level, check the oil level using the sight glass or dipstick as indicated in your manual. Add oil if necessary.
  10. Final Reassembly:
    • Replace the engine guard and skid plate. Ensure all bolts are snug and at proper torque.
    • Dispose of old oil and filter at an approved recycling facility.
    • Wipe down any drips, double-check for leaks after a short ride.

Model-Specific Call-Outs for 2016 Honda CRF450X

  • Separate Engine and Transmission Oil: The 2016 CRF450X uses two separate oil compartments: one for the engine, and one for the transmission/clutch. Be sure to use the correct drain plug and filler points for each.
  • Avoid Overfilling: Overfilling either chamber can cause excessive pressure and possible leaks.
  • Crush Washer and O-rings: Always use a fresh crush washer and inspect/replace the filter cover's O-ring to prevent leaks.
  • Lifespan & Frequency: Change the oil and filter every 15 hours of riding or after six races, whichever comes first–a recommendation that holds true for both aggressive off-roading and dual-sport use.
  • License Plate Skid Plate Caution: Some aftermarket skid plates may substantially obscure access; removal is necessary but straightforward with hand tools.
  • Transmission Fill Tip: Many riders use 950ml in the transmission instead of Honda's spec'd 750ml to improve gearbox longevity, though this is at owner's discretion and not official Honda guidance.

Wrapping Up

Following this process ensures your 2016 Honda CRF450X stays reliable and race-ready. All OEM parts and preferred oils are available at MotoSport.com—your exclusive source for genuine CRF maintenance components and expert service advice.

Keep riding safe, and enjoy your CRF450X.

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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.