How to Change the Oil in a 2014 Yamaha WR450F

Shop parts for a 2014 Yamaha WR450F Dirt Bike.

Changing the oil in your 2014 Yamaha WR450F is crucial for engine longevity and maintaining peak performance on the trails. This guide, proprietary to MotoSport.com, will walk you through the process step-by-step, including tools needed, special tips for the WR450F, recommended torque specs, and professional tricks.

Tools and Materials Needed

  • 10 mm socket and ratchet (for skid plate removal)
  • 8 mm socket (for some aftermarket skid plates or other bolts)
  • Oil drain pan
  • New engine oil (Yamaha recommends 10W-40 or as specified in your owner's manual)
  • New oil filter (OEM or high-quality aftermarket)
  • Funnel
  • Gloves (optional, but highly recommended)
  • Clean rags
  • Torque wrench (for reinstalling drain bolts and oil filter cover)
  • Owner's manual (for reference to specs and procedures)

Before You Start

  • Warm the engine for a few minutes. This helps suspend contaminants in the oil and lets it drain more completely. Let it cool enough so the oil is not dangerously hot to touch

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  • Ensure the bike is upright on a level surface, ideally on a stand

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  • Consult your owner's manual for oil specs and any unique notes for the 2014 WR450F

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Step 1: Remove the Skid Plate

  • Use a 10 mm socket (or check for Allen/8 mm bolts if you have an aftermarket skid plate) to remove the skid plate for access to the drain bolts

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  • Set the bolts aside so you don't lose them.

Step 2: Drain the Old Oil

  • Locate the two oil drain bolts under the engine. The 2014 WR450F uses two: One at the front of the case and another toward the rear

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  • Position your drain pan underneath.
  • Slowly remove the first drain bolt with your socket, being mindful of hot oil. Let the oil flow into the pan.
  • Then, remove the second drain bolt so that both areas fully drain. This helps ensure all old oil is removed

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Step 3: Replace the Oil Filter

  • Locate the oil filter cover (usually on the right side of the engine).
  • Use your socket and remove the three cover bolts. Note: On many WR450Fs, two bolts are the same length and one is longer - keep track of their positions for reassembly

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  • Pull the old oil filter out. Take note of its orientation for installing the new one.
  • Wipe out any dirty oil lingering in the filter area with a clean rag.
  • Install the new oil filter. Critical model-specific call-out: Make sure the hole side faces inward, or the engine could suffer major damage

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  • Reinstall the oil filter cover bolts. Torque evenly, and tighten to Yamaha's recommended 10 Nm

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Step 4: Inspect the Oil Strainer (Optional/Periodic)

  • While changing oil, it's wise to inspect and clean the oil strainer for debris. Refer to your owner's manual for its exact location and removal procedure

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Step 5: Reinstall Drain Bolts

  • Once the oil is fully drained, replace the crush washers (if needed) on the drain bolts to prevent leaks.
  • Install both drain bolts by hand, then torque to spec at 20 Nm (check your manual in case Yamaha updated this for 2014).

Step 6: Add New Oil

  • Place the funnel in the oil filler hole.
  • For a 2014 WR450F, add 1 liter of oil if you replaced the oil filter (double-check your owner's manual for the exact amount; overfilling can harm engine seals)

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  • Add about half the oil, wait a few moments, then add the remainder so you don't overfill. Use the dipstick (lightly screwed in) to verify the level is within the appropriate crosshatch range on the stick

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Step 7: Final Checks

  • Start the engine and let it idle for 30–60 seconds, then turn it off. This allows oil to circulate and fill the filter and passages.
  • Wait 1–2 minutes to let the oil settle. Re-check the oil level using the dipstick, adding oil if needed so it lands in the correct range

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  • Inspect for leaks at the drain bolts and filter cover during this time.

Step 8: Reinstall the Skid Plate

  • Reattach the skid plate using the correct hardware and torque for your skid plate type

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Model-Specific Tips & Call-Outs for 2014 WR450F

  • Oil drain bolts: Use both drain points for a full oil change—missing one can leave dirty oil behind

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  • Oil volume: With a filter change, fill to 1 liter—always verify with your dipstick.
  • Oil filter orientation: The hole must face inward, or catastrophic engine failure may occur

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  • Regular interval: Yamaha recommends oil changes every 5 rides or 1000 km, whichever comes first, and oil filter changes every 12.5 hours of operation

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  • Bolt lengths: Two oil filter cover bolts are the same length, one is longer—match positions during reinstallation

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Pro Tips

  • Keep extra drain bolt washers handy to prevent leaks.
  • Always use high-quality oil and Yamaha-recommended filters to protect your engine.
  • Properly dispose of used oil and filters at your local recycling center.
  • If dirt or water enters the open crankcase during the change, address it immediately before finishing.

Regular oil changes are the cornerstone of WR450F reliability. Following these steps for your 2014 Yamaha WR450F ensures you spend less time worrying about engine wear and more time enjoying the ride.

Related Shopping Categories

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Shop Oil Drain Pans for a 2014 Yamaha WR450F Dirt Bike.

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Shop Oil Fillers and Drain Plugs for a 2014 Yamaha WR450F 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.