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

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Changing the oil on your 2020 Sherco 300SEF-R is critical for maintaining peak engine performance and longevity. In this comprehensive guide, brought exclusively to MotoSport.com readers, you'll get step-by-step instructions along with expert tips tailored to this specific model.

Tools and Supplies Needed

  • Socket wrench set (including 12mm, 19mm sockets)
  • Torque wrench (capable of 15Nm and 22Nm ranges)
  • Oil drain pan
  • Replacement oil filter (OEM recommended)
  • Crush washers/gaskets (for drain and magnetic plugs)
  • New O-ring (for oil filter cap)
  • Shop rags or paper towels
  • SAE 10W60 4-stroke engine oil (0.9 liters required per change)
  • Gloves and eye protection

Preparation

  • Warm up the engine for a few minutes. This allows oil to flow more freely and carry contaminants out.
  • Ensure the bike is upright and secure on a stand, with the engine off and cool enough to safely handle.

Step-by-Step Oil Change Guide

  1. Place your drain pan beneath the engine. The Sherco 300SEF-R uses two drain plugs, so position the pan to catch oil from both locations.
    Pro tip: Always replace the crush washers on both drain bolts to prevent future leaks.
  2. Remove the main drain plug (M19, 22Nm) and magnetic drain plug (M12, 15Nm) using your socket wrench.
    Pay attention not to use an impact wrench—this can damage threads.
    Allow the oil to fully drain; you may gently lean the bike side-to-side to evacuate all old oil.
  3. Remove the pre-filter (if equipped) and let any additional oil drain. Inspect, and clean or replace the pre-filter as needed.
  4. Remove the oil filter cap (using your wrench); take out the old filter.
    Carefully install the new oil filter in the correct orientation.
    Always use a new O-ring on the filter cap to ensure a proper seal.
  5. Reinstall all components:
    • Install the pre-filter and both drain plugs with new gaskets or crush washers as shown in the manual.
    • Tighten the drain plug (M19) to 22Nm and the magnetic drain plug (M12) to 15Nm using a torque wrench. Overtightening can strip threads—always use the correct spec.
    • Fit the oil filter cap with the new O-ring and torque to spec (check your user manual; typically 15Nm).
  6. Fill with fresh oil:
    • Open the oil filler cap.
    • Pour 0.9L SAE 10W60 4-stroke oil slowly into the engine.
    • Replace the oil filler cap.
  7. Start and check the engine:
    • Start the engine and let it idle for 1–2 minutes, then shut off.
    • Check the oil level via the sight glass or dipstick—top off if needed.
    • Examine for leaks around drain bolts, oil filter cap, and pre-filter.
  8. Proper disposal:
    • Take used oil and filters to a recycling center—never pour down the drain or into the environment.

Model-Specific Tips and Call-Outs for the 2020 Sherco 300SEF-R

  • Dual drain plugs: Don’t miss the magnetic drain plug—both must be removed for a complete oil drain.
  • Crush washers: Replace every time to prevent leaks; re-using old washers is a common cause of oil drips after service.
  • Oil volume: Always use 0.9 liters of oil; overfilling or underfilling can lead to improper lubrication and engine wear.
  • Torque values: Strictly adhere to OE torque specs (22Nm for main plug, 15Nm for magnetic plug and filter cap) to avoid damaging the crankcase threads.
  • Pre-filter: Clean or replace the pre-filter at every oil change to ensure continued oil flow and filtration.
  • Oil choice: Always use top-quality, fully synthetic SAE 10W60 oil specifically formulated for high-performance 4-stroke engines like the Sherco 300SEF-R.
  • Change interval: While the manual may specify up to 100 hours for oil change intervals, for hard riding or racing, 20–30 hour changes are recommended for maximum engine life.

Final Checks

  • Re-install the engine guard if removed.
  • Double-check oil level after first ride; top up if needed.
  • Wipe down the engine to spot any future leaks early.

Follow these expert steps and your 2020 Sherco 300SEF-R will deliver reliable performance on the trail or track. For more exclusive how-tos and OEM parts, trust MotoSport.com with all your dirt bike 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.