How to Change the Oil in a 2020 Husqvarna FE350S

Shop parts for a 2020 Husqvarna FE350S Dirt Bike.

Changing the oil on your 2020 Husqvarna FE350S is a key maintenance task that keeps your engine running optimally and ensures a long life for your dirt bike. This MotoSport.com exclusive how-to guide walks you through all you need to know, including the essential tools, step-by-step instructions, and important model-specific tips to avoid costly mistakes.

Tools and Materials Needed

  • 13mm socket or wrench (for drain plug)
  • 8mm socket or T30 Torx bit (for skid plate removal, depending on setup)
  • Allen wrenches (for oil filter cover or other covers as needed)
  • Drain pan
  • Replacement oil filter
  • New engine oil (refer to owner's manual for specification and amount)
  • Clean rags
  • Crush washer or copper washer (for drain plug – always replace)
  • Grease (for O-rings and oil filter cover)
  • Torque wrench (recommended for reassembly)
  • Contact cleaner (for cleaning parts and area around oil fill)

Step-by-Step Instructions

  1. Warm Up the Engine
    Let the bike idle for a few minutes. This warms the oil, allowing it to drain more completely.
  2. Set Up the Bike
    Secure the bike on a stand or a hoist to keep it upright and steady. If you only have a sidestand, have someone hold the bike while you work for stability, especially when removing stubborn bolts. Never work underneath an unsecured bike.
  3. Remove the Skid Plate (Bashplate)
    Use an 8mm socket or T30 Torx bit (depending on your hardware) to remove the skid plate. Some plates have cut-outs, but oil tends to spill and make a mess, so removing it completely is best. Wash the skid plate while it is off. Tip: Removing the plate gives you much better access to the sump plug and avoids oil pooling on the plate.
    Call-out for 2020 FE350S: The hardware alternates between socket and Torx, so bring both tools.
  4. Drain the Oil
    Place your drain tray directly under the magnetic sump plug, which is a 13mm hex head bolt with a copper washer at the rear base of the engine case. Carefully remove the plug. Allow the oil to completely drain. Inspect the plug for metal shavings – a few fine shavings are normal but excessive debris could indicate a problem.
    Note: Do not remove any other Allen-head plugs in the engine case; only remove the correct sump plug to avoid causing damage or extra work.
  5. Remove and Clean Oil Screens
    The FE350S has at least one oil screen accessible near the drain plug. Remove and clean it with contact cleaner, then let it air dry. Make sure it's free of debris before reinstallation.
  6. Replace the Oil Filter
    Use an appropriate Allen wrench to remove the oil filter cover (often located on the clutch cover side). Remove the old oil filter. Wipe the area clean, lubricate the O-ring on the new filter and cover with fresh grease, and install the new filter.
    Call-out for 2020 FE350S: Always grease the O-ring on the filter cover to ensure a proper seal and make removal easier at the next service. Replace the oil filter at every oil change.
  7. Replace the Crush Washer and Reinstall Sump Plug
    Install a new copper washer onto the sump plug and hand-tighten it. Use a torque wrench to tighten the plug to the specification outlined in your owner's manual (typically around 15 lb-ft, but always double-check). Do not over-tighten as this can strip the threads in your engine case.
    Pro tip: Never reuse the old washer. They are cheap and help ensure a leak-free seal.
  8. Refill With Oil
    Using a funnel, pour in high-quality four-stroke synthetic motorcycle oil meeting your bike's specific requirements. Check your owner's manual for the correct oil capacity (approximately 1.2L for a full change with filter, but verify for your model and year).
    Pour slowly to prevent overfilling. After filling, let the oil settle for a minute, then check the sight glass or dipstick.
    Always use oil recommended by Husqvarna for optimal performance.
  9. Inspect for Leaks and Final Steps
    Start the engine and let it idle for 1–2 minutes. Shut it off and inspect the sump plug and oil filter cover area for leaks. Top up the oil if needed, then reinstall the skid plate.
    Dispose of used oil and filter properly at a local recycling center.
  10. Reset Maintenance Reminders
    If your FE350S is equipped with a service reminder, reset it according to your user manual.

Specific Tips and Warnings for the 2020 FE350S

  • Avoid removing any Allen-head plugs at the bottom of the engine not specifically identified as sump plugs to prevent accidental removal of critical engine parts.
  • Be sure to lubricate all O-rings before reassembly to prevent pinching or tearing.
  • Do not over-tighten any oil system bolts to avoid stripping or cracking the casings.
  • Use only the correct oil weight and specification as detailed in your owner’s manual.

Maintenance Frequency

  • Change your oil every 10–15 hours of riding or as indicated in your maintenance schedule for optimal engine health.

Changing your oil regularly keeps your 2020 Husqvarna FE350S running strong and reliable. Take your time, use the right tools, and always double-check your work. For premium oil change supplies, filters, and OEM parts, visit MotoSport.com for trusted products and expert support.

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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.