How to change the oil in a 2025 Husqvarna FE350S Dirt Bike

How to Change the Oil in a 2025 Husqvarna FE350S – MotoSport.com Exclusive Guide

Shop parts for a 2025 Husqvarna FE350S Dirt Bike.

Regular oil changes are essential for maintaining the peak performance and longevity of your 2025 Husqvarna FE350S dirt bike. This comprehensive step-by-step blog, proprietary to MotoSport.com, covers all specific call-outs, tools needed, and key reminders for FE350S owners.

Tools and Supplies Needed

• 13mm socket or wrench (for sump plug)
• Allen wrenches (to remove skid plate/bash plate, if installed)
• Drain tray/pan
• New oil filter (ensure model/year specificity)
• New copper crush washer (for sump plug)
• Motorex 10W-50 4T oil (or manufacturer recommended oil, check your manual for capacity)
• Grease (for O-rings)
• Clean rags
• Contact cleaner (optional, for cleaning residual oil)
• Measuring cup (for precise oil refilling)
• Paper funnel
• Gloves (recommended for safety and cleanliness)

2025 Husqvarna FE350S Oil Change – Key Model-Specific Call-Outs

• The FE350S uses a magnetic sump plug, an oil screen, and a replaceable oil filter.
• Several Allen-head plugs are visible on the engine bottom; only the 13mm hex head plug at the rear is the sump plug. Removing other plugs can lead to costly mistakes and mechanical issues. Do not remove any plug unless you are certain of its purpose.
• Never over-tighten the sump plug — this can strip threads or crack cases.
• Always replace the copper washer on the sump plug and oil filter O-rings during every oil change.

Step-By-Step Oil Change Procedure

• 1. Prepare Your Work Area
  • Place the bike securely on a stand or have someone hold it steady upright.
  • Remove the skid plate/bash plate for unobstructed access to the sump plug. Most plates have oil plug cutouts, but removing the plate allows for less mess and easier cleanup.
• 2. Remove the Sump Plug & Drain Oil
  • Position your drain tray directly underneath the sump plug (the 13mm hex bolt at the rear bottom of the engine).
  • Carefully loosen and remove the sump plug. Allow all oil to drain fully.
  • While draining, you may notice some magnetic debris collected on the plug—this is normal for high-performance engines.
  • Replace the copper washer on the plug with a new one.
• 3. Remove and Inspect the Oil Screen
  • Locate the oil screen plug and remove it. Inspect the screen for debris and clean with brake/contact cleaner if needed.
  • Reinstall the cleaned screen.
• 4. Replace the Oil Filter
  • Remove the oil filter cover using the appropriate tool.
  • Pull out the old oil filter and discard it properly.
  • Very lightly grease the new oil filter O-rings. This ensures the O-ring seats and seals correctly.
  • Insert the new filter and reinstall the cover, torquing bolts to manufacturer specification.
• 5. Reinstall Sump Plug and Fill Oil
  • Clean the sump plug, inspect, and fit the new copper washer.
  • Install the sump plug and tighten. Do not over-tighten to prevent thread damage.
  • Using a clean funnel, pour in the recommended amount and type of oil (see your owner's manual for exact 2025 FE350S oil capacity).
  • Some prefer to pre-saturate the oil filter with oil before installation to speed oil circulation at startup, but this is optional.
• 6. Inspect, Start, and Check Levels
  • Wipe away any spilled oil and clean around the case, screen, and filter using contact cleaner and rags as needed.
  • Reinstall the skid plate.
  • Start the engine and allow it to idle for 1–2 minutes. Shut off and let it settle, then check the oil level as per manual (use sight glass or dipstick). Add oil if needed.
• 7. Proper Disposal
  • Dispose of used oil and the old filter at an environmentally appropriate facility.

Expert Tips for the 2025 Husqvarna FE350S Owner

• Change oil every 10–15 riding hours, or more frequently if riding in demanding conditions (mud, heavy clutch use, high temperatures).
• Follow manufacturer-specific oil type and capacity closely for optimal engine health.
• Never re-use crush washers or O-rings. New seals prevent leaks and pressure loss.
• Always double-check you are removing only the specified sump plug and not any other Allen-head plugs or case bolts. Removing unintended plugs risks damage and leaks.

Common Mistakes to AVOID

• Don’t over-tighten the sump plug: this can strip threads on your crankcase.
• Don’t re-use old washers or O-rings: always replace for a secure seal.
• Don’t use non-recommended oil types or brands: the FE350S is designed for specific lubricants. Stick to what is listed in the owner’s manual for best results.
• Don’t remove the oil pump cover or Allen-head plugs on the bottom of the engine: these are not related to oil draining and can cause serious issues if removed.

Conclusion

Changing the oil on your 2025 Husqvarna FE350S is straightforward if you use the right tools and adhere to bike-specific steps. Always reference your owner’s manual for torque specs and capacities, and complete each oil change with care and the correct parts for peace of mind every ride. If in doubt, trust your FE350S to a certified technician or MotoSport.com service professional.

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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.