How to Change the Oil in a 2024 Sherco 125 SE FACTORY

Shop parts for a 2024 Sherco 125 SE FACTORY Dirt Bike.

Changing the oil in your 2024 Sherco 125 SE FACTORY is essential maintenance, ensuring the longevity and performance of your dirt bike. While the 125 SE is a two-stroke machine, it still requires regular gearbox (transmission) oil changes to keep the clutch and gears working smoothly. Below you'll find everything you need to perform a robust oil change, proprietary to MotoSport.com, including model-specific call-outs and tools required.

Tools Needed

  • 17mm wrench or socket (for drain and possibly filler plugs)
  • Oil pan to catch old oil
  • Funnel for mess-free filling
  • Measuring cup or graduated cylinder (for accurate oil quantity)
  • Rubber gloves (optional for cleanliness)
  • Clean shop rags
  • Torque wrench (recommended for reinstallation of drain plug)
  • Replacement drain plug washer (replace if damaged or leaking)

Oil Specification – Quantity

  • Gearbox Oil Type: SAE 10W40 (high-quality four-stroke motorcycle transmission/gear oil)
  • Oil Capacity: 500ml

Always use the oil type and capacity specified for your bike; overfilling or underfilling can cause clutch and gearbox issues.

Step-by-Step: Oil Change Process

  1. Warm Up the Engine
    Start the bike and let it idle for 2–3 minutes. This helps the old oil drain more completely by lowering its viscosity.
  2. Turn Off and Secure Bike
    Switch the engine off and place the bike on a stable stand or level ground.
  3. Remove the Drain Plug
    Locate the gearbox oil drain bolt on the left side of the engine case. Use the 17mm wrench to loosen and remove it. Let the oil fully drain into your oil pan. Inspect or replace the crush washer on the drain plug if necessary.
  4. Inspect Oil and Plug
    Check the drained oil for metal particles or discoloration, which could indicate internal wear. Wipe the drain plug clean, especially if it’s magnetic to remove any trapped debris.
  5. Reinstall Drain Plug
    Once the oil stops dripping, reinstall the drain plug with its washer. Tighten it to manufacturer-recommended torque (typically 12 Nm for most plugs on Sherco engines, but confirm in your owner’s manual).
  6. Remove the Filler Cap
    Locate the oil fill cap (often at the top of the clutch cover). Remove it using a wrench or by hand.
  7. Add Oil
    Using a funnel, pour 500ml of fresh SAE 10W40 gearbox oil into the fill hole. Measure precisely to avoid overfilling.
  8. Reinstall Filler Cap
    Screw the oil filler cap back securely by hand.
  9. Check for Leaks
    Start the bike and let it idle for a few minutes, then check around the drain plug and filler cap for leaks.
  10. Dispose of Used Oil Properly
    Pour the old oil into a sealed container and take it to a designated oil recycling facility.

2024 Sherco 125 SE FACTORY Call–Outs – Tips

  • Oil Quantity: Precise 500ml measurement is critical for this model. Overfilling can lead to clutch drag; underfilling accelerates gear wear.
  • Oil Type: Always use non-automatic transmission oil and not engine oil—a high-quality 10W40 specifically for motorcycle gearboxes is recommended. Avoid car engine oils as they lack necessary gear and clutch additives.
  • Drain Plug Location: Some confusion exists between the engine coolant drain and gearbox oil plug; ensure you’re removing the gearbox oil plug as shown in your service manual.
  • Crush Washer: Replace the crush washer if you notice any oil seepage; reusing a deformed washer can cause chronic leaks and contamination.

Frequently Asked Questions

  • How often should I change the transmission oil?
    Change the transmission oil every 10–15 hours for hard riding or racing, or at least every 20–30 hours for trail and recreational use. Check your owner's manual for specific recommendations.
  • Do I need to change the engine oil too?
    The Sherco 125 SE FACTORY is a two-stroke, so there is no engine oil to change—only the transmission (gearbox) oil. Be sure to keep your two-stroke premix at the proper ratio in your fuel.
  • What about other maintenance while changing the oil?
    Inspect your clutch cover for leaks, check clutch adjustment, and look at the oil for unusual colors or particles that may indicate wear or water intrusion.

Final Advice

Always consult your workshop manual or MotoSport.com Technical Support for questions or uncertainties specific to the 2024 Sherco 125 SE FACTORY. Proper and regular gearbox oil changes will keep your transmission shifting smoothly and your clutch fully functional for the life of the bike.

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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.