How to Change the Oil in a 2020 Sherco 300SE-R

Shop parts for a 2020 Sherco 300SE-R Dirt Bike.

This step-by-step guide is exclusive to MotoSport.com and details the oil change procedure for your 2020 Sherco 300SE-R. Proper maintenance is crucial for engine longevity and performance, and changing your oil at regular intervals is one of the most effective ways to protect your dirt bike investment.

Tools and Materials Needed

  • Socket set (including 8mm, 12mm, and 19mm sockets and/or appropriate Allen wrenches)
  • Oil drain pan
  • Torque wrench (capable of reading 10Nm, 15Nm, and 22Nm)
  • Replacement crush washers/gaskets
  • Oil filter (replace with every oil change)
  • O-ring for oil filter cap (replace if worn)
  • High-quality 4T motorcycle oil (SAE 10W60, 0.9L)
  • Parts cleaning brush and shop rags
  • Gloves
  • Funnel

Model-Specific Call-Outs

  • This procedure applies directly to the 2020 Sherco 300SE-R and models from 2017 onwards, as confirmed by owner reports.
  • The engine uses 0.9 liters of SAE 10W60 oil for optimal performance – do not substitute lower-grade or incorrect-weight oils.
  • There are two drain bolts on the engine case's bottom; both must be removed to fully drain old oil from the crankcase.
  • Always use new crush washers/gaskets and a new oil filter on each change to prevent leaks and ensure filtration efficiency.
  • NEVER use an impact wrench on drain bolts as the cases are soft and prone to stripping.

Step-by-Step Oil Change Instructions

  1. Warm Up the Engine
    Start the bike and let it idle for a few minutes. This thins the oil, helping it drain completely. Shut off the engine and place the motorcycle securely on a level stand.
  2. Remove the Engine Guard
    If equipped, remove the engine guard (skid plate) for better access to the drain bolts.
  3. Locate and Remove the Drain Bolts
    Place the oil drain pan under the engine. Remove both drain bolts (one is a standard drain bolt, one is a magnetic drain bolt). Use a 19mm socket for drain plug 1 (tightened to 22Nm) and a 12mm socket or Allen wrench for the magnetic plug (tightened to 15Nm). Inspect the magnetic plug for metal shavings as an early warning of engine wear.
  4. Remove and Clean the Pre-Filter(s)
    Take out the pre-oil filter(s), usually located near the drain bolts. Clean thoroughly or replace as specified. Let all old oil fully drain – this may take several minutes.
  5. Replace the Oil Filter
    Locate and remove the oil filter cover (typically three bolts, use appropriate socket). Take out the old oil filter and O-ring. Wipe down the housing mating surfaces. Install a new filter in the same orientation as shown in your manual and use a new O-ring. Reinstall the cap and tighten to 15Nm.
  6. Reinstall Drain Bolts & Pre-Filters with New Gaskets
    Replace and torque the main drain plug (22Nm), magnetic plug (15Nm), and any pre-filters using new gaskets or crush washers per the manual specifics. Do not overtighten to avoid damaging the threads.
  7. Refill with Fresh Oil
    Open the engine oil filler cap and slowly pour in 0.9 liters (900 milliliters) of SAE 10W60 4T motorcycle oil using a funnel. Wait a few minutes, then check the oil level in the sight glass.
  8. Check Oil Level and Top Off
    With the bike upright and level, verify oil is at or near the indicated mark in the sight window. Add oil as needed, but do not overfill. Reinstall the oil filler cap securely.
  9. Reinstall the Engine Guard
    If removed, reinstall the engine guard firmly.
  10. Start the Engine and Inspect for Leaks
    Start the bike and let it run for a minute. Shut it off, recheck the oil level, and inspect for leaks at the drain plugs, oil filter, and cap. Top off if the oil level drops.
  11. Properly Dispose of Used Oil and Filter
    Take the used oil, filters, and rags to an authorized waste disposal or recycling center. Never pour used oil down the drain or into the environment.

Additional 2020 Sherco 300SE-R Owner Tips

  • Change oil at intervals recommended by Sherco but consider earlier changes for heavy use or racing – many riders find changing at 50–60 hour intervals ensures smoother shifting and better reliability, even though the manual may quote 100 hour intervals for oil changes.
  • Always inspect old oil and filters for metal debris as an indicator of internal wear.
  • If you encounter any gasket leaks or stripped threads, address them before running the engine or riding.
  • Be sure to note torque specs. Both overtightening and undertightening can cause leaks or damage.

With this guide, Sherco 300SE-R owners can confidently keep their bikes performing at their best – on the track or trail. Trust MotoSport.com for all your parts, fluids, and maintenance needs.

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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.