How to Change the Oil in a 2021 Husqvarna FE350S
Shop parts for a 2021 Husqvarna FE350S Dirt Bike.
Regular oil changes are essential for the performance and longevity of your 2021 Husqvarna FE350S. This guide, made exclusively for MotoSport.com enthusiasts, walks you through every step, tool, and tip you'll need to confidently complete the oil change while highlighting model-specific callouts.
Tools and Materials You’ll Need
- 8mm socket or Torx T30 bit for removing the skid plate
- 13mm socket for the sump plug
- Pin wrench for oil screen removal (optional but helps with access)
- Drain pan (sized for at least 1.5L)
- Torque wrench (for accurate reinstallation of sump plug – 14.8 ft-lbs recommended)
- New oil filter (OEM recommended)
- Replacement oil (as specified in your owner’s manual)
- New copper crush washer for the drain plug
- Shop towels/rags for cleanup
- Needle nose pliers (for the oil screen)
- Grease/lubricant for O-rings
- Protective gloves (optional but recommended)
Step-by-Step Instructions
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Position the Motorcycle
- Place your FE350S upright on a secure stand or leave it on the sidestand with assistance to keep it stable while loosening bolts. Make sure the engine is cool to avoid burns and ensure all oil is in the sump for complete draining.
Tip: Full access to the bottom of the engine is important for mess-free work.
Do not tip or overbalance the bike.
- Place your FE350S upright on a secure stand or leave it on the sidestand with assistance to keep it stable while loosening bolts. Make sure the engine is cool to avoid burns and ensure all oil is in the sump for complete draining.
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Remove the Skid Plate
- Using an 8mm socket or Torx T30, remove the bolts on the skid plate. On the 2021 FE350S, the skid plate can be pulled forward and dropped down; you don’t always have to remove it entirely. This will expose both the oil filter access and the 13mm drain plug at the rear of the engine.
Model Call-Out: Many aftermarket or stock plates have cutouts over the drain plug, but removing the plate minimizes spillage and gives you a chance to clean the plate while you’re at it.
- Using an 8mm socket or Torx T30, remove the bolts on the skid plate. On the 2021 FE350S, the skid plate can be pulled forward and dropped down; you don’t always have to remove it entirely. This will expose both the oil filter access and the 13mm drain plug at the rear of the engine.
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Drain the Old Oil
- Place your drain tray under the engine. Remove the 13mm hex head drain plug; be sure to catch the crush washer. The plug has a magnet for collecting particles—inspect it for metallic debris.
Model Call-Out: The FE350S has several Allen-head plugs under the engine that look like possible sump plugs. Do NOT remove these. Only use the 13mm magnetic plug at the rear of the sump.
- Place your drain tray under the engine. Remove the 13mm hex head drain plug; be sure to catch the crush washer. The plug has a magnet for collecting particles—inspect it for metallic debris.
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Remove and Clean the Oil Screen
- Use a pin wrench or needle nose pliers to extract the oil screen. Inspect it for debris or metal shavings and clean thoroughly before reinstallation.
Tip: When reinstalling, ensure O-rings are greased and not damaged. There’s a groove that the screen sits in—incorrect installation can let debris pass and damage internal components.
- Use a pin wrench or needle nose pliers to extract the oil screen. Inspect it for debris or metal shavings and clean thoroughly before reinstallation.
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Replace the Oil Filter
- Remove the oil filter cover (after cleaning the area to prevent contamination). Replace the old filter with a new one, greasing O-rings as needed.
Tip: Always replace the oil filter whenever you change the oil for maximum protection.
- Remove the oil filter cover (after cleaning the area to prevent contamination). Replace the old filter with a new one, greasing O-rings as needed.
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Reinstall Drain Plug and Oil Screen
- Fit a new copper washer to the drain plug. Thread the drain plug in by hand, then torque to 14.8 ft-lbs (20 Nm). Install the oil screen—ensure correct orientation and that the O-rings are greased and seated properly.
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Refill with New Engine Oil
- Add oil as specified in your owner’s manual. Pour slowly and use a funnel to avoid spills. Confirm the level using the sight glass on the right side of the engine with the bike vertical.
Manufacturer’s Recommendation: Use oil of the grade and viscosity Husqvarna recommends for the best engine protection.
- Add oil as specified in your owner’s manual. Pour slowly and use a funnel to avoid spills. Confirm the level using the sight glass on the right side of the engine with the bike vertical.
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Reinstall Skid Plate
- Once you’ve checked for leaks and topped off the oil if needed, reinstall the skid plate with the original bolts.
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Final Check and Clean-Up
- Start the engine, let it idle for a minute, then shut off and check for leaks. Inspect the oil level again and adjust if necessary. Wipe off any spilled oil from the engine and chassis.
Tip: Properly dispose of the used oil and filter at a recycling location.
- Start the engine, let it idle for a minute, then shut off and check for leaks. Inspect the oil level again and adjust if necessary. Wipe off any spilled oil from the engine and chassis.
Important Notes Specific to 2021 Husqvarna FE350S
- Magnetic sump plug is designed to catch metallic debris—always inspect it during oil changes.
- Oil screen requires correct reinsertion. Improper seating may allow debris through and harm the oil pump or engine.
- Multiple plugs under engine: Only remove the 13mm bolt for draining oil. The others are not for draining and should remain untouched.
- Replace copper washer with every oil change to ensure a proper seal and avoid leaks.
- Grease O-rings on the oil screen and filter to avoid pinching or leaks.
What Not To Do
- Do not over-tighten the sump plug—this can strip threads or crack the case.
- Do not reuse copper washers—failure to replace may cause leakage.
- Do not force bolts—if a bolt or plug is stuck, reassess and use the correct tool/technique.
- Do not confuse filter cover or oil pump cover with plugs—refer to your manual for location and type.
Pro Tips for Husqvarna FE350S Owners
- Clean around all sealing surfaces before installation to ensure a leak-free service.
- Have extra rags ready—removing the skid plate and cleaning it reduces cleanup time later.
- Keep records of your oil changes for resale value and warranty purposes.
By following these steps and paying close attention to the unique features of your 2021 Husqvarna FE350S, you’ll ensure long engine life and reliable performance every time you hit the trail.
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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.