How to Change the Oil in a 2020 Sherco 450 SEF FACTORY

Shop parts for a 2020 Sherco 450 SEF FACTORY Dirt Bike.

Maintaining your 2020 Sherco 450 SEF FACTORY with regular oil changes is essential for longevity and optimal performance. This walk-through—proprietary to MotoSport.com—details everything you need for a successful oil change, including required tools, exact steps, and key model-specific notes.

Tools and Materials Needed

  • 8mm socket
  • 17mm socket
  • 4mm Allen wrench
  • Torque wrench (Nm scale)
  • Oil drain pan
  • Funnel
  • Cleaning rags
  • New engine oil (SAE 10W40, 1.1 liters capacity)
  • New oil filter
  • Replacement crush washers/O-rings (for drain bolts and filter cap)
  • Safety gloves

Model-Specific Call-Outs – 2020 Sherco 450 SEF FACTORY

  • This model uses multiple drain bolts; ensure you remove all for complete drainage.
  • Always replace the oil filter during each oil service. Never reuse old filters.
  • Torque settings are critical: Magnetic drain plug (M12) 15Nm; oil filter cap 15Nm; primary drain plug (M18) 15Nm; secondary drain plug (M32) 20Nm.
  • Only use the specified oil capacity and recommended grade: 1.1 liters SAE 10W40.
  • Never use impact tools on drain plugs or filter bolts.
  • Ensure the bike is level and cool before starting.

Step-by-Step Guide

  1. Preparation
    • Run the engine for a minute to warm the oil. This ensures better flow, but don’t let it get hot for safety.
    • Secure your bike on a stand and ensure it is upright.
    • Put on your gloves and place the oil drain pan beneath the engine.
  2. Drain the Oil
    • Locate the two drain bolts underneath the engine. These will require the 17mm socket and possibly the 8mm socket depending on bolt placement .
    • Use your socket wrench to slowly loosen the bolts. Remove the magnetic drain plug (M12) and let the oil drain completely. Repeat with the second drain bolt (M32), ensuring every bit of old oil escapes .
    • Check the crush washers. Replace if deformed or excessively worn. This prevents future leaks.
  3. Change the Oil Filter
    • Remove the oil filter cap (usually requiring a 4mm Allen or 8mm/17mm depending on design).
    • Pull out the used oil filter and discard responsibly.
    • Install the new oil filter in the correct orientation. Lubricate the new filter’s O-ring with a tiny bit of clean oil.
    • Fit a new O-ring or gasket on the filter cap.
    • Reinstall the filter cap and tighten to 15Nm using your torque wrench .
  4. Reinstall Drain Bolts
    • Once oil has stopped draining, reinstall both drain bolts with new crush washers.
    • Torque the M12 magnetic drain plug and M18 plug to 15Nm; torque the M32 plug to 20Nm. Do not overtighten.
  5. Refill with New Oil
    • Remove the oil filler cap on top of the engine.
    • Using a funnel, pour in 1.1 liters of SAE 10W40 oil slowly .
    • Check oil level using the inspection window on the crankcase with the bike perfectly upright.
    • Reinstall the filler cap securely.
  6. Start and Check
    • Start the engine and let it idle for 1 minute. Watch for any leaks near the drain bolts and filter cap.
    • Switch off the engine, wait two minutes, then recheck oil level and top off if required.
    • Dispose of used oil and filter at an approved recycling center.

Expert Tips and Reminders

  • Do not exceed torque recommendations to avoid stripped threads and oil leaks .
  • Always change both the oil filter and pre-filters at every oil change for maximum engine protection .
  • Monitor your maintenance intervals. While the manual lists up to every 100 hours, MotoSport.com recommends more frequent changes (every 10–15 hours for heavy use) for best results .

Regular oil changes protect your Sherco's engine from wear, maximize power, and sustain reliability through even the toughest rides. By following these steps, you’ll keep your investment performing like Factory fresh—only at MotoSport.com.

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Shop Tools for a 2020 Sherco 450 SEF FACTORY Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2020 Sherco 450 SEF FACTORY 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.