How to change the oil in a 2023 Husqvarna FE350S Dirt Bike

How to Change the Oil in a 2023 Husqvarna FE350S: Complete Guide

Shop parts for a 2023 Husqvarna FE350S Dirt Bike.

Keeping the engine oil in your 2023 Husqvarna FE350S fresh is crucial for peak performance – and longevity. This robust, step-by-step blog, proprietary to MotoSport.com, gives you everything you need to tackle this vital maintenance task—including tools, specifics for your exact model, and expert call-outs.

Tools and Supplies Needed

• Socket wrench with 8mm and 13mm sockets (or T30 Torx bit for skid plate bolts)
• Oil drain tray
• New oil filter (OEM part: 77338005100)
• Motorex 4T Power Synth 10W-50 engine oil (1 liter)
• Replacement O-rings and crush washer (OEM parts: 07703305178, 0770020170, 0770110015, 58038022000)
• Needle nose pliers (for oil screen)
• Shop rags/paper towels
• Torque wrench (set to 14.8 ft-lb)
• Spray cleaner (like brake cleaner), optional for cleaning parts
• Stand or hoist to keep bike upright and stable
• Nitrile gloves (optional, for cleanliness)

Important Call-Outs for the 2023 Husqvarna FE350S

• The FE350S uses a magnetic sump plug, an oil screen, and an oil filter; do not remove additional Allen-head plugs on the underside, as these are not sump plugs and should not be touched.
• The drain plug is a 13mm hex head with a copper washer, located on the rear of the engine.
• The skid plate may partly obstruct access but can be moved or quickly removed for full clearance.
• Incorrect installation of the oil screen or damage to O-rings can lead to engine damage or oil leaks—pay close attention to these steps. Double check for metallic debris on the magnetic plug and oil screen.

Step-by-Step Process

1. Prepare the Bike
   • Warm up your engine briefly to thin the oil, making it easier to drain.
   • Secure the bike upright on a hoist or suitable stand. If using the sidestand, have someone steady the bike for safety.
2. Remove the Skid Plate
   • Use an 8mm socket or T30 Torx bit to remove the two bolts holding the skid plate. The stock plate comes off easily, while some aftermarket plates only need to be loosened and pulled forward.
   • This exposes the oil filter, drain plug, and oil screen for easy access.
3. Drain the Engine Oil
   • Position your drain tray under the engine.
   • Use a 13mm socket to remove the oil drain plug (hex head at the back of the engine), being careful of hot oil.
   • Allow the engine to drain completely.
   • Remove the oil screen using needle nose pliers. Inspect for metallic debris and clean thoroughly.
   • Remove the oil filter cover and the old oil filter. If the cover, screen, or plug O-rings are flattened or damaged, replace them—this prevents leaks and ensures a proper seal.
4. Inspect and Clean Components
   • Wipe or spray clean the drain plug, oil screen, and filter cover sealing surfaces.
   • Check the magnetic plug specifically for any metal shavings–a small amount of fine debris is normal, but significant material could signal a bigger problem.
5. Reinstall and Refit
   • Lubricate the new O-rings with a bit of clean oil before reinstalling the oil screen and filter cover.
   • Insert the clean oil screen, ensuring it's fully seated in its groove before tightening; misalignment can allow debris to bypass, leading to pump or engine damage.
   • Install the new oil filter with the open side toward the engine (double-check orientation based on the filter type).
   • Replace the crush washer on the drain plug, and reinsert the plug, tightening to 14.8 foot-pounds using your torque wrench.
   • Replace and tighten the oil filter cover, making sure the O-ring is not pinched or twisted.
6. Refill with Fresh Oil
   • Remove the oil fill cap and pour in Motorex 4T Power Synth 10W-50, using just under a full liter (check the manual for the exact amount if unsure).
   • Replace and tighten the oil fill cap.
   • Start the engine and let it idle for several minutes, then shut off and check for leaks around the filter, drain plug, and screen.
   • Check the oil level with the bike upright after a couple of minutes–top off if needed.
7. Reinstall the Skid Plate
   • Wipe any spilled oil from the bike frame and components.
   • Reinstall the skid plate using the same hardware you removed, ensuring everything is snug but not over-torqued.

Quick Reference Table: 2023 FE350S Oil Change Kit Components

Expert Tips & Common Mistakes

• Do not remove secondary Allen-head plugs underneath the engine; they are not for oil draining and, if removed, can trigger unnecessary engine disassembly tasks.
• Always replace the crush washer to prevent leaks on reassembly.
• Inspect all sealing O-rings for damage and replace if necessary.
• If you see substantial metallic shavings on the plug or screen, consult a mechanic before riding further.

MotoSport.com Pro Insight

Using genuine Husqvarna or KTM parts and oil is the best way to ensure factory-spec performance and durability for your 2023 FE350S. If you ride in especially dusty or wet conditions, consider changing oil and cleaning/replacing the oil screen more frequently for optimal engine health.

Perform this routine regularly, and your Husqvarna FE350S will deliver the reliability and performance you expect, ride after ride.

This guide is proprietary to MotoSport.com and tailored to your 2023 Husqvarna FE350S—ride safe and wrench smart.

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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.