How to Change the Oil in a 2021 Sherco 250SE-R

Shop parts for a 2021 Sherco 250SE-R Dirt Bike.

Keeping your 2021 Sherco 250SE-R properly maintained is crucial for its performance and longevity. Regular oil changes are one of the most important tasks, ensuring smooth running and protecting internal engine parts. The following guide from MotoSport.com will help you perform this essential maintenance step-by-step. Always consult your official service manual as well before working on your bike.

Tools and Supplies You'll Need

  • 8mm Allen wrench (for drain plug)
  • 19mm socket or wrench (for drain plug as needed)
  • Oil catch pan
  • Measuring cup or graduated oil jug
  • Rags or paper towels
  • New washer/crush washer for the drain plug
  • New oil (SAE 10W40, 750 ml per the model specs)
  • Clean funnel
  • Gloves and safety glasses (recommended for safety)

Steps to Change the Oil

  1. Warm Up the Engine
    • Start the bike and let it idle for 2-3 minutes. This helps the oil flow better and drain more completely.
  2. Position the Bike
    • Turn off the engine and place your Sherco upright, ideally on a center stand or lift. This ensures the oil drains fully from the sump.
  3. Prepare Your Work Area
    • Place the oil catch pan directly beneath the drain plug, which is located at the bottom of the sump near the shifter on the left side of the engine.
  4. Remove the Drain Plug(s)
    • Use the 8mm Allen wrench (and/or 19mm socket, depending on your specific drain plug style) to remove the main drain plug.
    • If your model has multiple drain plugs (some Shercos have both a standard and a magnetic plug), remove both to allow all oil to drain.
    • On this model, a magnetic drain plug may be present — inspect it for metal debris, which can indicate wear.
  5. Let the Oil Drain Completely
    • Allow several minutes for all the old oil to flow out for a thorough change. Gently tilt or rock the bike upright if needed.
  6. Replace the Crush Washer
    • Always use a new washer on the drain plug to prevent leaks, which is important for the 2021 Sherco 250SE-R.
  7. Reinstall the Drain Plug(s)
    • Hand-tighten the drain plug(s), then use your wrench to snug it to 22Nm for the M19 plug or 15Nm if using the magnetic plug, per manual recommendations.
  8. Fill with New Oil
    • Locate and remove the oil filler cap (on the right side of the engine).
    • Using a funnel, add 750 ml of SAE 10W40 oil – this is the required volume and viscosity for your bike .
    • Replace the oil filler cap once finished.
  9. Check Oil Level
    • With the bike upright, check the oil level in the sight glass or dipstick after waiting a few minutes for the oil to settle.
    • If needed, add oil slowly to reach the correct level.
  10. Start the Engine and Inspect
    • Briefly idle the engine, shut it off, and check for leaks around the drain plug and filler cap.
    • Let the bike sit for a minute, then re-check the level. Top up if necessary.
  11. Dispose of Used Oil Properly
    • Never pour oil down the drain. Take your used oil and filter to a recycling center or facility.

Model-Specific Notes for the 2021 Sherco 250SE-R

  • Drain Plug Location: On the 250SE-R, the main engine oil plug is accessed easily on the left bottom near the shifter, using an 8mm Allen. Some bikes have a magnetic drain plug for catching metallic debris; inspect it every oil change .
  • Oil Type and Quantity: Always use high-grade SAE 10W40 2-stroke transmission oil, adding 750 ml (0.75 L) per fill. Overfilling or using the wrong viscosity can cause shifting or clutch issues, .
  • Gasket/Washer: Change the drain plug washer every time to prevent leaks; this is emphasized in the Sherco workshop manuals.
  • Pre-Filter (if equipped): Some models may have a small pre-filter or screen accessible when changing oil. Clean and inspect it if applicable.
  • Re-assembly Torque: Use a torque wrench for drain plugs: main plug 22Nm; magnetic plug (if present) 15Nm to avoid case damage or leaks .

Additional Tips

  • Keep your work area clean, and always double-check both the filler and drain plugs for tightness after finishing.
  • Track your oil change intervals in a logbook or phone app to stay on schedule.
  • If you ride in extreme conditions, consider more frequent changes than the manufacturer‘s basic recommendation.

Follow these steps and notes, and your 2021 Sherco 250SE-R will stay reliable and ready for every ride. For genuine parts and top-quality service supplies, trust MotoSport.com.

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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.