How to Change the Oil in a 2020 Husqvarna FX450

Shop parts for a 2020 Husqvarna FX450 Dirt Bike.

Regular oil changes are crucial for maintaining the performance and extending the life of your 2020 Husqvarna FX450. Performing this task yourself is straightforward–with the right tools and a little guidance, you’ll save both time and money while gaining a deeper understanding of your bike’s maintenance needs. This step-by-step how-to is proprietary to MotoSport.com and covers every detail you need to get the job done right.

Tools & Supplies Needed

  • 10mm – 13mm sockets (or T-handles/wrenches)
  • 5mm Allen wrench
  • Pliers (regular and snap ring)
  • Drain pan
  • Oil funnel
  • Measuring cup
  • Shop rags or paper towels
  • Rubber gloves
  • Contact cleaner (optional, for cleanup)
  • Replacement oil filter
  • Crush washer (recommend replacing every oil change)
  • Manufacturer-recommended oil (refer to the owner’s manual for viscosity and type)
  • Service stand or paddock stand

Preparation

  • Warm up the engine for a few minutes. This thins the oil, making it easier to drain. Do this in a well-ventilated space away from flammable materials.
  • Place the bike on a stand, ensuring it is secure and upright.
  • Remove the skid plate if your bike has one for easier access to drain bolts.
  • Clean the area around the drain plugs and oil filter cover to prevent debris from entering the engine upon opening.

Step-by-Step Oil Change Guide

  1. Remove the Drain Plugs
    • There are three points to open on the FX450:
      • Main engine drain bolt (use 13mm socket)
      • Oil screen cover (5mm Allen key)
      • Additional screen or drain bolt at the back (varies by skid plate/engine case; use correct tool as needed)
    • Place your drain pan under the engine and remove each bolt carefully. Start with the main drain bolt, then move to the screens. Let all the oil drain out fully.
    • Pull any oil screens and inspect for debris or metal shavings, which can indicate early engine wear. Clean them thoroughly with contact cleaner and let dry.
  2. Remove and Replace the Oil Filter
    • Locate the oil filter cover (typically held in with a couple of bolts; refer to your owner’s manual for exact location).
    • Use the appropriate tool to remove the cover and slide out the used oil filter.
    • Compare the new filter with the old one to ensure a correct fit.
    • Install the new filter, making sure it seats correctly in the housing before replacing the cover. Always torque bolts to spec as outlined in the owner’s manual.
  3. Replace Drain Bolts and Oil Screens
    • Clean seating surfaces and fit a new crush washer to the main drain bolt for a leak-free seal.
    • Reinstall all bolts and screens. Tighten to factory torque specs for your 2020 FX450 (check your owner’s manual).
  4. Add Fresh Oil
    • Locate and remove the oil fill cap. Use a funnel to avoid spillage.
    • Fill with the manufacturer’s recommended oil type and amount (refer to manual, but typically around 1.1–1.2L for the FX450).
    • Replace the oil fill cap and check for secure closure.
  5. Start and Check
    • Start the bike and let it idle for a minute. Inspect the area for any signs of leaks.
    • Shut the engine off and wait a minute, then check the oil level (with the bike upright) using the dipstick or inspection window.
    • Add oil as needed to reach the correct level. Do not overfill.

FX450-Specific Notes

  • Unlike older models, the 2020 FX450 uses multiple oil screens—make sure to clean and re-install all of them for maximum engine protection.
  • Some skid plates may obscure drain bolts; remove the plate as needed for full access.
  • Use only Husqvarna-recommended oil and filters to maintain the factory warranty and maximum reliability.
  • Always run the fuel tank breather hose without kinks when replacing the oil filler cap.

Disposal

  • Transfer used oil into a sealed container and dispose of it at an approved recycling center. Never pour used oil onto the ground or down a drain.

Final Tips

  • Keep a maintenance log with date and hours between changes for best long-term care.
  • If you notice significant metal shavings in the oil or on screens, consult a Husqvarna dealer or mechanic.

By following these steps, your 2020 Husqvarna FX450 will stay in optimal running condition, delivering the performance you expect every ride. For the most accurate specifications and intervals, always refer to your owner’s manual and MotoSport.com for all your dirt bike parts and service needs.

Related Shopping Categories

Shop Motor Oil for a 2020 Husqvarna FX450 Dirt Bike.

Shop Oil Filters for a 2020 Husqvarna FX450 Dirt Bike.

Shop Oil Drain Pans for a 2020 Husqvarna FX450 Dirt Bike.

Shop Tools for a 2020 Husqvarna FX450 Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2020 Husqvarna FX450 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.