How to Change the Oil in a 2018 Sherco 250SEF-R: Step-By-Step for MotoSport.com

Shop parts for a 2018 Sherco 250SEF-R Dirt Bike.

Regular oil changes are critical to keeping your 2018 Sherco 250SEF-R running strong. Dirty oil can rapidly degrade engine performance, cause internal wear, and reduce the overall life of your dirt bike. This comprehensive guide covers every detail, from required tools to model-specific tips you need when changing your Sherco's oil.

Tools and Materials Needed

  • Socket set (including M12, M19 sockets)
  • Torque wrench
  • Drain pan
  • New oil filter (replace at every oil change)
  • New crush washers/gaskets (for drain plugs and oil filter cap)
  • Clean rags
  • Funnel
  • Engine oil, SAE 10W60 (0.9 liters)
  • Rubber gloves

Preparation

  • Ensure your bike is warm but not hot; a quick ride or idling for a few minutes will help oil flow out easily.
  • Set the bike on a stable stand on level ground.
  • Gather all tools and supplies ahead of time.

Step-by-Step Oil Change

  1. Remove Skid Plate/Engine Guard
    If your 250SEF-R has a skid plate or engine guard, remove it to access the drain plugs easy.
  2. Locate the Drain Plugs
    There are two drain plugs on the 2018 Sherco 250SEF-R: a standard and a magnetic plug. Both should be removed for a complete drain.
  3. Drain the Oil
    • Put your drain pan beneath both drain plug locations.
    • Remove the Drain Plug 1 using a 19mm socket. Let the oil flow out.
    • Remove the Magnetic Drain Plug with a 12mm socket. Be careful: Oil may still be hot.
    • Also remove the Pre-filter and allow all oil to drain out, cleaning the pre-filter as needed.
  4. Replace the Oil Filter
    • Remove the oil filter cap. Inspect and replace the O-ring with a new one for best sealing.
    • Remove the old oil filter and insert the new one–confirm orientation matches the service manual's guidance.
    • Reinstall the cap and torque to 15 Nm.
  5. Reinstall Plugs and Pre-Filter
    • Install the pre-filter and both drain plugs with new crush washers/gaskets.
    • Tighten magnetic drain plug to 15 Nm; tighten the main drain plug to 22 Nm.
  6. Refill Engine Oil
    • Remove the engine oil filler cap (see photo/location in service manual).
    • With a funnel, pour in 0.9 liters of SAE 10W60 engine oil.
    • Reinstall the filler cap securely.
  7. Check Oil Level
    • Start the engine and let it idle for 30–60 seconds. Shut off and let sit for a minute.
    • Check the sight glass or dipstick (as your model provides) for proper oil level; add oil if necessary.
  8. Reinstall the Skid Plate/Engine Guard
  9. Clean Up & Dispose of Oil Properly
    • Wipe up any drips, check for leaks under the bike.
    • Take used oil and filter to a recycling center. Never dump oil down a drain or on the ground.

2018 Sherco 250SEF-R Specific Tips & Call-outs

  • Always use a new oil filter and replace the O-ring on the filter cap at every oil change.
  • Use new crush washers or gaskets on drain plugs to prevent leaks.
  • Torque values are critical; do not overtighten drain plugs, as the aluminum threads can strip easily.
  • Confirm you pour in the right oil volume: 0.9L of SAE 10W60. Over– or under-filling can harm the engine.
  • Oil changes are recommended at least every 6000 km (4000 miles) or more frequently for hard/race use.
  • The pre-filter and the magnetic plug play a crucial role in catching metallic debris—clean both thoroughly at every oil change.
  • Only use high-quality, JASO MA2 certified oil to maximize clutch and engine longevity.
  • Check the service manual if you suspect any leaks after changing oil; improperly seated seals or O-rings are common culprits.
  • If you ever notice milky oil (indicating coolant contamination), inspect water pump seals as per the manual.

Conclusion

Changing oil on your 2018 Sherco 250SEF-R is a straightforward job, but attention to detail pays off with longer engine life and reduced risk of mechanical failures. For further support, events, and dirt bike parts, MotoSport.com is your destination for proprietary resources and the highest quality parts for your Sherco and every ride ahead.

Related Shopping Categories

Shop Motor Oil for a 2018 Sherco 250SEF-R Dirt Bike.

Shop Oil Filters for a 2018 Sherco 250SEF-R Dirt Bike.

Shop Oil Drain Pans for a 2018 Sherco 250SEF-R Dirt Bike.

Shop Tools for a 2018 Sherco 250SEF-R Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2018 Sherco 250SEF-R 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.