How to Change the Oil in a 2021 Husqvarna FC350: A Complete MotoSport.com Guide
Shop parts for a 2021 Husqvarna FC350 Dirt Bike.
Changing the oil in your 2021 Husqvarna FC350 is essential for keeping your dirt bike running reliably and delivering peak performance. Regular oil changes help prevent engine wear, flush out contaminants, and extend engine life. This guide, proprietary to MotoSport.com, walks you through every step for the FC350, including model-specific tips and tool recommendations.
Tools & Supplies Needed
- 13mm wrench or socket (for drain bolts and oil screen)
- 8mm socket (for oil filter cover)
- Needle-nose pliers (for removing oil screen)
- Drain pan
- Shop towels or rags
- New oil filter (Husqvarna OEM or quality equivalent)
- Fresh 4-stroke motorcycle oil (Husqvarna recommends 10W-50 fully synthetic, capacity: approx 1.1 quarts/liters)
- New crush washer (recommended with each oil change)
- Parts cleaner or brake cleaner (for cleaning the oil screen and sealing surfaces)
- Torque wrench (optional but recommended, torque to 14.8 ft-lbs for drain plug)
Step-by-Step Instructions
- Warm Up the Engine
- Start the bike and let it idle for 2-3 minutes. This warms the oil so it drains thoroughly and suspends contaminants.
- Prepare the Work Area
- Put the bike on a triangle stand or secure it level.
- Place the drain pan beneath the engine's drain bolt.
- Remove the Oil Fill Cap
- Loosen the oil fill cap on the right side of the engine to help oil drain faster.
- Remove the Main Drain Bolt and Oil Screen
- Under the engine, find the 13mm drain bolt. Remove it and allow oil to start draining.
- Using needle-nose pliers, carefully pull out the oil screen. Place the screen on a towel for inspection and cleaning.
- Remove the Second Drain Bolt
- Locate and remove the secondary drain bolt (13mm) to allow all oil to exit.
- If your model has both a magnetic drain bolt and an oil screen, always clean the screen and inspect for any large metallic debris, which could indicate engine wear. Some FC350s only have one drain bolt and the screen, so check your model year specifically.
- Clean and Inspect Components
- Thoroughly clean the oil screen with parts cleaner. Ensure there's no metal debris or sludge remaining before reinstalling.
- Check the O-rings and crush washers on the drain bolts and cap. Replace as needed. Always use a new crush washer to prevent leaks.
- Wipe the sealing surfaces to remove dirt or old oil.
- Remove and Replace the Oil Filter
- Use an 8mm socket to remove the oil filter cover bolts.
- Remove the old oil filter, noting the direction it sits in the cover or case.
- Lightly coat the new filter with engine oil and install it, ensuring a correct seal and orientation.
- Reinstall the oil filter cover and tighten the bolts evenly. Check the O-ring for wear and replace if necessary.
- Reinstall the Drain Bolt and Screen
- Install the oil screen, carefully aligning it in the groove for a proper seat. Misalignment can let debris into the oil pump and cause engine damage.
- Reinstall both drain bolts with new crush washers. Tighten to 14.8 ft-lbs with a torque wrench for best results.
- Fill with Fresh Oil
- With the bike level, fill through the oil fill port with 1.1 quarts (1.04 liters) of high-quality synthetic 10W-50 4-stroke oil. Use a funnel for accuracy and cleanliness.
- Reinstall the oil fill cap and wipe up any spills.
- Start the Engine and Final Check
- Start the bike and let it idle for 1-2 minutes. Turn off the engine and let oil drain back down.
- Check the oil level with the bike upright and on level ground. Add oil as needed, but do not overfill. Husqvarna recommends checking the level with the dipstick (if equipped) or sight glass after resting for several minutes, per the owner's manual.
- Dispose of old oil and filter at a recycling center.
Pro Tips – Model-Specific Callouts for the 2021 Husqvarna FC350
- Drain Screen Alignment: Ensure the oil screen installs flush and seats fully into its groove. Misalignment is a common error and can lead to oil bypassing filtration, harming the oil pump and engine internals .
- Tightening Spec: Always use a new crush washer and torque the drain bolts to the manufacturer's spec of 14.8 ft-lbs .
- Oils and Filter: Only use the recommended full synthetic 10W-50 oil and a quality filter for best engine protection .
- Oil Change Interval: Race and high performance environments may require more frequent oil changes than the manual suggests.
- Aftermarket Parts: MotoSport.com offers complete oil change kits for Husqvarna 250/350 models that include oil, filter, and crush washers for convenience .
- Environmental Caution: Never mix types or brands of oil and properly dispose of used oil and filters according to local regulations .
An oil change is a straightforward but vital process for protecting your 2021 Husqvarna FC350. Performing this task yourself saves money, builds mechanical confidence, and ensures your bike is ready for your next ride. For all your OEM parts, oils, and tools, trust MotoSport.com—your dirt bike authority.
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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.