How to Change the Oil in a 2018 Husqvarna FX450: The Complete MotoSport.com Guide
Shop parts for a 2018 Husqvarna FX450 Dirt Bike.
Regular oil changes are vital to keeping your 2018 Husqvarna FX450 running at peak performance. This detailed guide, proprietary to MotoSport.com, walks you step-by-step through the entire oil change process for the FX450, including all tools needed and critical model-specific tips.
Tools and Supplies Needed
- 10mm, 13mm socket or wrench (for drain bolts and oil filter cover)
- Torque wrench (for precise reinstallation of bolts)
- Drain pan (to collect used oil)
- New oil filter (OEM or quality aftermarket, as per owner’s manual)
- Replacement O-rings (for oil filter cover and oil screens, inspect and replace as needed)
- Replacement copper washers (for drain plug)
- Clean rags or shop towels
- Oil funnel (for clean, spill-free refills)
- Engine oil: 10W-50 synthetic 4-stroke motorcycle oil (1.2 Liters, e.g., Bel-Ray Thumper Racing Synthetic 10W-50)
- Screwdriver
- Rubber gloves (optional, for cleaner hands)
Preparation
- Start with a warm engine (run for about 3–5 minutes) to help the oil flow out smoothly, but not hot to the touch.
- Place the bike on a stable stand.
- Lay out your tools, new oil, and fresh filter within easy reach.
- Have a drain pan ready to catch old oil.
Step-by-Step Oil Change Procedure
- Remove the skid plate (if installed) to access the bottom of the engine.
- Clean the engine area around the drain plug, oil filter cover, and fill cap to prevent debris from entering the system.
- Remove the oil fill cap on top of the right side of the engine to allow better drainage.
- Position the drain pan under the engine.
- Remove the two oil drain bolts (bottom of the engine, usually 13mm and 10mm). Allow oil to drain completely.
- Remove oil screens:
- Withdraw both oil screens from their housing using a socket or screwdriver. Check for debris and excess metal.
- Model-specific tip: On the 2018 FX450, the smaller oil screen has a second O-ring that may not be immediately visible. Inspect and replace as needed for a proper seal.
- Clean the screens with solvent or replace if excessively dirty or damaged.
- Remove the oil filter cover (right side of the engine, 3 bolts typically 8mm or 10mm). Pull out the old oil filter.
- Soak the new oil filter in fresh oil before installation to prime it for first start.
- Install the new filter, ensuring correct orientation as per manual. Replace the cover and O-ring if worn or hard.
- Reinstall oil screens securely, replacing O-rings and copper washers as necessary. Tighten all screen and drain bolts to manufacturer’s torque specification.
- Reinstall skid plate if removed.
- Add 1.2 liters of fresh 10W-50 oil through the filler hole, using a funnel to prevent spills. Double-check the exact quantity in your owner’s manual.
- Reinstall the oil fill cap and wipe off any spilled oil.
- Start the engine and idle for 3 minutes. Turn off and let the bike sit for a minute, then check oil level via the sight glass on the right side:
- Proper oil level: Halfway to three-quarters up the glass.
- If low, add oil a little at a time. Do not overfill.
- Check for leaks around the drain plugs and filter after the engine runs.
- Dispose of old oil and filter responsibly at a recycling facility.
2018 Husqvarna FX450-Specific Call-Outs and Tips
- Dual oil screens: Inspect both filters carefully. The small screen features a hidden second O-ring. Failing to replace this can cause small leaks or oil pressure issues.
- Oil type: Husqvarna recommends a high-quality fully synthetic 10W-50 oil for the FX450 to maintain optimal performance and clutch durability.
- Correct torque: Always use a torque wrench and tighten bolts to factory specifications (consult owner’s manual for exact settings).
- Keep extra crush washers, O-rings, and oil screens in your toolbox. Regular replacement helps prevent leaks and contamination.
- Inspect drained oil for metallic particles, which could indicate abnormal wear inside the engine.
Conclusion
Changing the oil on your 2018 Husqvarna FX450 is straightforward when you have the right tools and know the model-specific steps. Make oil changes a routine task and your FX450 will reward you with peak power and reliability ride after ride. For OEM parts, service kits, and high-performance oil, trust MotoSport.com—your authority in off-road motorcycle maintenance.
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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.