How to Change the Oil on a 2021 Husqvarna FE450HQ

Shop parts for a 2021 Husqvarna FE450HQ Dirt Bike.

Changing the oil in your 2021 Husqvarna FE450HQ is an essential part of maintaining optimal performance and reliability on the trail or track. This guide, proprietary to MotoSport.com, takes you step-by-step through the entire process, highlighting model-specific tips to ensure you get the job done right and protect your investment.

Tools and Supplies Needed

  • Engine oil – Motorex 4T Power Synth 10W-50 is the recommended oil for your Husqvarna FE450HQ
  • OEM oil filter (part number: 77338005100)
  • OEM O-rings for oil filter cover, strainer screen, and drain plug
  • OEM crush washer for drain bolt
  • 10mm and 13mm T-handle or socket
  • 5mm Allen wrench
  • Snap ring pliers
  • Channel lock pliers
  • Drain pan
  • Funnel
  • Rags or shop towels
  • Measuring cup or graduated container
  • Contact or brake cleaner
  • Safety glasses
  • Rubber gloves

Make sure you work in a well-ventilated area, away from open flames or heat sources.

Preparation

  • Warm up the engine: Run the motorcycle for a few minutes to warm the oil. This thins the oil, allowing it to drain more completely and carry away more contaminants.
  • Stabilize the bike: Place the bike on a stand or level surface. Ensure it's secure and upright.
  • Remove the skid plate: If your 2021 FE450HQ has a skid plate, remove it to access the drain plugs.
  • Clean around the drain area: Use a rag to wipe dirt and debris away from the drain plug, oil filter cover, and surrounding areas to prevent contamination during the oil change.

Draining the Oil

  • Locate the drain plugs: The FE450HQ has two drain locations:
    • Main drain plug (lower engine case, usually with a 13mm head)
    • Oil screen plug (identified by a recessed Allen or bolt, check your manual for location if unsure)
  • Remove the drain plugs: Use the correct socket or Allen wrench to remove the drain and oil screen plug. Allow all the oil to drain into your pan.
  • Remove the oil filter cover: Use a 5mm Allen wrench to remove the bolts from the oil filter cover and gently take out the cover. Pull out the oil filter and inspect for contamination.
  • Clean the oil screen: If equipped, pull out the oil screen using snap ring pliers. Rinse thoroughly with brake/contact cleaner and a toothbrush. Let dry completely before reinstalling.
  • Inspect O-rings and washers: Replace the O-rings on the filter cover, oil screen, and drain plug. Replace the crush washer on the main drain plug every oil change to prevent leaks.

Installing the New Filter and Refilling Oil

  • Insert new oil filter: Slide a fresh OEM oil filter into place, making sure it is properly seated and oriented.
  • Reinstall the oil filter cover: Fit the new O-ring on the cover before attaching. Reinstall the bolts and tighten evenly to specification (do not overtighten).
  • Reinstall the oil screen and drain plugs: Make sure the cleaned oil screen is dry, insert it and install its plug/O-ring. Reinstall the main drain plug with a new crush washer. Tighten everything to the torque specified in your owner—s manual.
  • Add new oil: Using a funnel, pour in the recommended quantity of Motorex 4T Power Synth 10W-50. Your 2021 FE450HQ requires about 1.25 – 1.3 liters (check your manual for exact volume). A graduated cup helps with accuracy.
  • Check oil level: With the bike upright and on level ground, check the oil sight glass or dipstick. Adjust by adding oil if needed.
  • Run the engine and recheck: Start the bike and let it idle for 2-3 minutes. Shut off and inspect for leaks. Recheck the oil level after a few minutes and top off if necessary.
  • Reinstall the skid plate: If removed, reinstall the skid plate securely.

Model-Specific Call-Outs for the 2021 Husqvarna FE450HQ

  • Oil capacity: The FE450 requires approximately 1.25 – 1.3 liters of oil during a change.
  • Oil type: Use only fully synthetic 10W-50 motorcycle oil, such as Motorex 4T Power Synth, as recommended by Husqvarna.
  • Multiple drain points: Be certain to remove both the main drain plug and the oil screen plug to fully evacuate old oil.
  • Filter and screen maintenance: Always inspect and clean the oil screen during every oil change. Replace O-rings regularly to prevent leaks and ensure reliable engine lubrication.
  • Crush washer replacement: Always use a new crush washer on the drain bolt to maintain a proper seal and prevent leaks.
  • Dispose of old oil responsibly: Transfer used oil to an appropriate recycling container and take it to a recycling center. Never pour oil down a drain or onto the ground.

Additional Tips

  • Keep a detailed log of every oil change – date, hours, and type/quantity of oil used.
  • If you ride aggressively or at high RPMs, consider shortening oil change intervals for optimum engine protection.

Changing the oil in your 2021 Husqvarna FE450HQ is a straightforward process that, when done regularly, ensures your bike delivers peak performance, longevity, and reliability. With the right tools and careful attention to the steps above, you’ll keep your Husqvarna ready for every ride.

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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.