How to Change the Oil in a 2019 Sherco 250SE-R

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

Proper oil changes are critical to the health and performance of your 2019 Sherco 250SE-R dirt bike. This guide, proprietary to MotoSport.com, walks you through the process with step-by-step instructions, required tools, quantities, and specific notes unique to the 250SE-R model. Following these recommendations will help extend the life of your bike and optimize its performance on every ride.

Tools and Materials Needed

  • Socket wrench set (preferably with 8mm, 17mm, and 19mm sockets)
  • Allen wrench/hex key set (for filter cover bolts if needed)
  • Oil drain pan
  • Funnel
  • Shop rags or paper towels
  • Replacement oil filter
  • New O-ring or gasket for oil filter cover
  • Crush washers (fresh ones for drain bolts recommended)
  • 750 ml of high-quality SAE 10W40 2-stroke gearbox oil (not 4-stroke engine oil.)
  • Parts tray for bolts and washers
  • Gloves for handling used oil

Model-Specific Call-Outs and Tips

  • The 2019 Sherco 250SE-R uses a 2-stroke engine and requires a specific approach compared to 4-strokes. Do not confuse engine/gearbox oil with premix for the gas tank – you are servicing the transmission/gearbox oil only.
  • Capacity: 750 ml of SAE 10W40 gearbox oil is required for a full change – topping off is not recommended; always do a flush and complete replacement for best results.
  • If the bike has just been used, the oil will drain easier while warm, but be careful not to burn yourself. Let the engine cool for 10 minutes after shutting off.
  • This bike has two oil drain bolts; both should be removed during the oil change for a complete flush.

Step-by-Step Oil Change Guide

  1. Preparation
    • Place the bike on a steady stand or lift to keep it upright and stable.
    • Lay out all tools and materials within reach.
    • Warm up the engine for a few minutes to thin out the oil, allowing it to drain more efficiently, then power off and let cool as needed.
    • Clean dirt and debris from around the drain and fill areas to prevent contaminants entering the engine.
  2. Draining Old Oil
    • Position the oil drain pan under the lowest point of the engine – locate both drain bolts on the underside of the engine case.
    • Using the correct socket (usually 17mm or 19mm for Sherco 2-strokes), carefully loosen both drain bolts (one on each side of the sump, main and magnetic bolts if provided).
    • Let the old oil fully drain. Carefully remove any magnetic tip from the drain plug and inspect for metal debris, indicating possible gear wear.
    • Clean the drain plug(s) and fit new crush washers if available.
  3. Changing the Oil Filter (if equipped)
    • Unlike 4-stroke engines, many 2-strokes like the 250SE-R do not have a traditional oil filter – verify before attempting removal. Some models have a small screen or filter accessible by a cover plate; consult your manual.
    • If present, unscrew the oil filter cover with an Allen key, remove the filter or screen, clean or replace as necessary, and ensure the passage is clear.
    • Replace the filter or clean the screen, then install a new O-ring or gasket and replace the cover, tightening bolts evenly to the specified torque.
  4. Reinstalling Bolts and Finishing Up
    • Once oil has fully drained and all components are inspected or replaced, reinstall the drain bolt(s) with new crush washers. Tighten to recommended torque – typically around 15–22 Nm for similar models (check your service manual’s specs).
    • Wipe away any excess oil that may have dripped on the engine/frame.
  5. Refilling with Fresh Oil
    • Remove the gearbox oil filler cap, usually near the right-side engine case.
    • Using a funnel, pour in 750 ml of SAE 10W40 high-quality gearbox oil; do not overfill.
    • Replace the filler cap, then cycle the transmission through gears by spinning the rear wheel with the bike in neutral and the clutch pulled (with the engine off) to help distribute oil throughout the gearbox.
    • Check the oil level via the sight glass or dipstick if equipped, and top off as needed (but avoid overfilling.).
  6. Final Checks and Cleanup
    • Start the engine and let it idle for a couple of minutes to circulate new oil, then shut off and check for leaks around the drain plugs and filter cover.
    • Double-check the oil level and adjust if necessary.
    • Reinstall any engine guards or skid plates removed for access.
    • Safely dispose of waste oil and old parts at a designated recycling facility. Do not dump oil in the trash, down a drain, or in the wild.

Maintenance Notes and Reminders Exclusive to the 2019 Sherco 250SE-R

  • The recommended interval for gearbox/engine oil changes is typically every 15–20 hours of riding. In muddy, wet, or racing conditions, change more frequently.
  • Always use synthetic or semi-synthetic SAE 10W40 formulated for 2-stroke gearboxes. Using the wrong kind of oil can harm shifting and clutch performance.
  • Inspect magnetic drain plugs at each oil change for excessive debris – this is an early warning sign of internal wear.
  • If you encounter difficulty finding the correct drain bolts or aren’t sure about the oil filter setup, reference the official Sherco 250/300 SE-R workshop manual.

Conclusion

Routinely replacing the oil in your 2019 Sherco 250SE-R is a straightforward maintenance task that will pay back in reliability and performance. When in doubt, consult your user’s manual or dealer for model-specific torque values and any updates to procedures. Proper disposal of fluids and a careful approach stepping through each procedure will keep your track days trouble-free and your bike running strong for years to come.

Related Shopping Categories

Shop Motor Oil for a 2019 Sherco 250SE-R Dirt Bike.

Shop Oil Filters for a 2019 Sherco 250SE-R Dirt Bike.

Shop Oil Drain Pans for a 2019 Sherco 250SE-R Dirt Bike.

Shop Tools for a 2019 Sherco 250SE-R Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2019 Sherco 250SE-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.