How to Change the Oil in a 2023 Husqvarna FX350

Tools and Parts Needed

  • 8mm socket or T30 Torx bit (for skid plate bolts)
  • 13mm socket or wrench (for drain plug)
  • Drain pan
  • Motorex 4T Power Synth 10W-50 oil (1 Liter recommended by Husqvarna for the FX350)
  • OEM Oil Filter (77338005100)
  • OEM Oil Filter Cover O-Ring (07703305178)
  • OEM Strainer Screen O-Ring (0770020170)
  • OEM Lower Drain Plug O-Ring (0770110015)
  • OEM Crush Washer (58038022000)
  • Funnel
  • Shop towels
  • Latex/nitrile gloves (optional, for cleanliness)

Step-by-Step Oil Change Guide

  • Warm Up the Engine
    Briefly run your FX350 for 2-4 minutes. This heats the oil, helping it flow out smoothly and carry away more contaminants.
  • Stabilize Your Bike
    Place the bike on a level stand or center the bike upright. Ensure it won't tip.
  • Remove the Skid Plate (if equipped)
    Use an 8mm socket or T30 Torx bit to remove the two bolts securing the skid plate. You may only need to lower the front or move it aside; full removal depends on your plate design. This gives you better access to the drain plug and oil filter area.
    2023 FX350 uses the same setup as the FE/FC/EXC models; the process is almost identical for all 2017–2024 350-class Husqvarnas.
  • Drain the Oil
    With the bike stable and the area under the engine clean, position your drain pan. Use a 13mm socket to remove the main drain plug (located on the right side, lower crankcase beneath the engine).
    Let the oil drain completely. Inspect the drain plug for metal debris and check/replace the crush washer as needed. For best results, remove the oil filler cap (on the clutch cover, right side) as this helps the oil drain faster.
  • Clean and Check the Oil Strainer Screen
    The FX350 has an oil strainer screen near the drain plug. Gently remove it (note the O-ring) and rinse it with clean solvent or new engine oil. Check for metal shavings. Replace the O-ring if damaged or at every few changes.
  • Replace the Drain Plug and Screen
    Reinstall the cleaned oil strainer screen and the main drain plug. Use a new crush washer for the drain plug. Torque the plug to the manufacturer’s specified value (refer to the owner’s manual, —15 Nm is standard for most models). Do not overtighten.
  • Remove and Replace the Oil Filter
    On the right side of the engine, use the correct socket (usually an 8mm or 10mm) to remove the oil filter cover. Take out the old oil filter and note its orientation. Clean out the oil filter cavity with a lint-free towel.
    Lubricate the new oil filter’s O-ring with a touch of engine oil. Install the new oil filter, replace the filter cover O-ring/seal, and reattach the cover, tightening the bolts gently and evenly.
  • Add Fresh Oil
    Insert a funnel into the oil fill port on the clutch cover. Pour in Motorex 4T Power Synth 10W-50 up to the recommended capacity (approx. 1.1 L for the FX350; check the sight glass on the side of the case for proper level). Do not overfill.
  • Start and Re-Check Level
    Reinstall the filler cap, start the engine, and let it idle for 1-2 minutes. Shut the bike off and let it sit for another minute. Recheck the oil sight glass and top off if necessary.
  • Properly Dispose of Old Oil and Materials
    Pour the used oil and filter into a sealable container and take them to a recycling facility or dealer.
    Never pour oil on the ground or down a drain.
  • Reinstall the Skid Plate
    Bolt the plate back on, tightening the bolts securely.
  • Inspect for Leaks and Test Ride
    Wipe down the engine area and inspect for any leaks around the drain plug, screen, and filter. Take a short test ride and check again when you return.

2023 Husqvarna FX350 Owner-Specific Call-Outs

  • Oil Type and Quantity:
    Use 10W-50 full synthetic oil (Motorex 4T Power Synth preferred). The typical capacity for the FX350 is 1.1 liters.
  • Drain Plug Location: The FX350 uses a magnetic drain plug located under the right side of the engine. Make sure to check the plug’s magnet for debris every change.
  • Screen/O-Ring Service: Replace or inspect both O-rings on the drain plug and oil strainer screen every change to prevent leaks.
  • Oil Filter Orientation: Pay close attention to the direction of the oil filter (open end faces inward in most models).
  • Skid Plate Removal: If you have an aftermarket skid plate, removal may be different. Stock plates are generally quick to remove with two bolts.
    Tip: Always double-check all bolts and o-rings before riding after an oil change.
  • Service Interval:
    For aggressive/dirt use, change the oil every 10-15 hours of riding, or more frequently in harsh conditions.

Why Use OEM Parts and Proper Oil?

  • Using genuine Husqvarna or KTM oil filters and O-rings ensures the best fit and longevity for your engine.
  • Motorex 4T is recommended for optimal performance and protection in the FX350.

Conclusion

  • Changing the oil on your 2023 Husqvarna FX350 is a straightforward process with the right tools and preparation.
  • MotoSport.com stocks the exact oil change kits and supplies you need for this service, so you only have to order once for a complete package.
  • Regular oil changes keep your FX350 engine running powerfully and reliably on the track or trail.

Related Shopping Categories

Shop Motor Oil for a 2023 Husqvarna FX350 Dirt Bike.

Shop Oil Filters for a 2023 Husqvarna FX350 Dirt Bike.

Shop Oil Drain Pans for a 2023 Husqvarna FX350 Dirt Bike.

Shop Tools for a 2023 Husqvarna FX350 Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2023 Husqvarna FX350 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.