How to Change the Oil in a 2019 Sherco 250SEF-R — MotoSport.com Owner's Guide

Shop parts for a 2019 Sherco 250SEF-R Dirt Bike.

Changing the oil on your 2019 Sherco 250SEF-R is a crucial maintenance step to ensure your dirt bike runs smoothly and reliably. This guide is written specifically for this make, model, and year, with special callouts and details every Sherco 250SEF-R owner needs to know to keep their bike in peak condition.

Tools and Supplies Needed

  • 17mm socket
  • 19mm socket
  • 8mm socket
  • 4mm Allen wrench (for some bolts/covers)
  • Torque wrench (highly recommended for proper tightening)
  • Drain pan/container
  • Clean rags or paper towels
  • Replacement oil filter (required at every oil change)
  • New O-ring for oil filter cap (recommended)
  • New gaskets/crush washers for drain plugs (aluminum is common, but always inspect yours)
  • SAE 10W60 full synthetic engine oil (Sherco recommends 0.9L)
  • Funnel (helps avoid spills at the tricky fill port)
  • Nitrile gloves (optional, keeps hands clean)

Key Call-outs for the 2019 Sherco 250SEF-R

  • This model uses two drain plugs:– one standard and one magnetic. Be sure to remove both to ensure a full drain.
  • The oil fill port is located annoyingly close to the exhaust system, making access and pouring tricky–use a thin funnel and take your time.
  • Always install a new oil filter with every oil change and replace O-rings and crush washers as needed to prevent leaks.
  • The required engine oil capacity is 0.9L (900ml)–do not overfill.

Step-by-Step Guide to Changing the Oil

  1. Warm Up the Engine
    • Start the bike and let it run for about 2-3 minutes. This warms the oil and helps it drain out more completely.
    • Shut off the engine and place the bike securely on a stand so it's upright.
  2. Remove the Skid Plate / Engine Guard (if equipped)
    • This exposes the drain plugs. Use the 8mm socket or Allen as required to remove mounting bolts.
  3. Drain the Oil
    • Place your drain pan beneath the engine. There are two drain plugs underneath: the standard (19mm) and the magnetic (12mm or 17mm, check your bike).
    • Remove the main drain plug (19mm, 22Nm torque recommended for re-install). Allow oil to flow.
    • Remove the magnetic drain plug (12mm, 15Nm torque recommended for re-install). Inspect for any metal debris and clean it thoroughly.
  4. Remove the Oil Filter and Pre-filter
    • The oil filter cap is retained by bolts (typically 4mm Allen). Remove bolts and spin off the oil filter cap.
    • Pull out the old oil filter and replace it with a new one. Double check installation orientation per the manual and make sure O-ring is seated well.
    • Remove the pre-filter (if fitted). Clean or replace as needed.
  5. Check/Replace Washers and O-rings
    • Inspect the crush washers on the drain plugs. Always install new washers if they look worn or squashed to prevent leaks.
    • Always use a new O-ring for the oil filter cap.
  6. Reinstall the Drain Plugs and Filter Cap
    • Install the drain plugs with new washers. Main drain plug: torque to 22Nm. Magnetic drain plug: torque to 15Nm.
    • Install the cleaned/replaced pre-filter and new oil filter.
    • Install the oil filter cap, tightening the bolts evenly to the correct torque (check your service manual for spec, as overtightening can damage the O-ring).
  7. Refill the Engine with Oil
    • Remove the oil fill cap (can be awkward if the exhaust system is hot or in the way–be careful).
    • Use a funnel to pour in 0.9L (900ml) of SAE 10W60 full synthetic oil as specified by Sherco.
    • Replace the fill cap securely.
  8. Check Oil Level and for Leaks
    • Start the engine and let it idle for a minute. Stop engine, wait briefly, and check oil level in the sight glass (on the right side of the engine).
    • The oil level should be between the minimum and maximum lines. Add a small amount if necessary, but do not overfill.
    • Inspect for any leaks at the drain bolts, oil filter cap, and fill port.
  9. Dispose of Used Oil and Filter Responsibly
    • Used oil and filters should always be taken to a local recycling or collection center. Never dispose of oil in drains or on the ground.
  10. Reinstall the Skid Plate / Engine Guard
    • After verifying there are no leaks and correct oil level, remount your skid plate with correct hardware.

Additional Tips for Sherco 250SEF-R Owners

  • Oil Change Interval:– Sherco's racing manuals recommend oil changes at intervals up to 100 hours under light use, but most riders benefit from changing oil every 10-20 hours or after every few rides — especially for hard or race use.
  • Crush Washers:– While some owners reuse crush washers a few times, best practice is to replace them every oil change for a perfect seal.
  • Access Note:– The oil fill location is inconveniently close to the exhaust, requiring a slim funnel and steady hand. Filling slowly can avoid spills and burns.
  • Filter Direction:– Confirm the orientation of the filter matches the photo or manual diagram — installing backwards can cause oil starvation and engine failure.

If you have any questions about parts, oil, or tools for your specific 2019 Sherco 250SEF-R, contact the MotoSport.com customer service team for expert advice and genuine Sherco products.

Ride safe — and keep your Sherco running strong.

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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.