How to Change the Oil in a 2023 Sherco 125SE-R

Shop parts for a 2023 Sherco 125SE-R Dirt Bike.

MotoSport.com Exclusive: Complete Step-by-Step Oil Change Guide

Changing the oil in your 2023 Sherco 125SE-R is essential maintenance for peak performance and engine longevity. This bike is a liquid-cooled, 124.81cc two-stroke, with a gearbox that requires specific oil care. Below, you’ll find the tools you need, detailed steps, and several important call-outs specifically for the 2023 Sherco 125SE-R dirt bike.

Tools and Supplies Needed

  • 8mm Allen wrench
  • Drain pan
  • Torque wrench (recommended for reinstalling drain bolts)
  • Clean rags
  • 500ml SAE 5W40 transmission oil (see manual for specification confirmation)
  • Funnel
  • Replacement crush washers/sealing washers (recommended to replace with every oil change)
  • Gloves
  • Safety glasses (optional but recommended)

Model-Specific Call-Outs for the 2023 Sherco 125SE-R

  • This is a two-stroke engine:– You are changing gearbox/transmission oil, not engine oil.
  • Oil type:– Use 500ml of SAE 5W40.
  • Drain plug location:– The drain plug is accessed under the left side of the bike near the shifter. Access may be improved by lifting the shift lever up slightly.
  • Check for crush washers:– Always inspect and, if necessary, replace the sealing washer to prevent leaks.
  • Do not overfill:– Use a measuring container to ensure you add exactly the specified quantity.

Step-by-Step Oil Change Process

  1. Prepare your workspace.
    • Stabilize the bike on a stand or level surface.
    • Warm up the engine for about 2-3 minutes. Warm oil drains more completely, but the engine should not be hot.
    • Turn off the bike and remove the key for safety.
  2. Locate the Drain Plug.
    • Find the 8mm Allen drain plug at the bottom of the engine case, near the shifter.
    • You may need to lift the shift lever gently to access the plug with your Allen wrench. This is much easier and prevents stripped bolts or knuckles.
  3. Drain the Old Oil.
    • Place your drain pan directly underneath the drain bolt.
    • Slowly loosen the plug with the 8mm Allen wrench. Oil will begin to flow as soon as the bolt is removed.
    • Allow all oil to drain completely. This may take 5–10 minutes.
    • Inspect the old oil for excessive metal particles, which can indicate transmission wear.
  4. Inspect and Reinstall the Drain Plug.
    • Check the drain bolt and crush washer. Replace the washer if it’s deformed or damaged.
    • Clean the plug and threads.
    • Reinstall the drain bolt by hand first to avoid cross-threading, then snug with your Allen wrench. If you have a torque wrench, tighten to manufacturer spec (usually about 10–15nm for this size; check your manual to confirm).
  5. Refill with Fresh Oil.
    • Locate the fill plug (usually on the clutch cover’s top or side).
    • Remove the fill plug and insert a funnel.
    • Pour in 500ml of fresh SAE 5W40 transmission oil.
      • Use a graduated measuring container for exact quantity; too much or too little oil can harm your transmission.
    • Reinstall the fill plug and snug gently.
  6. Check for Leaks and Final Steps.
    • Wipe down the engine with a rag to remove any spilled oil.
    • Start the bike and let it idle for 1–2 minutes, then turn it off.
    • Inspect the drain and fill plug areas for any oil leaks. Tighten as needed.
    • Dispose of old oil properly at a recycling facility or auto parts store.

Tips for the 2023 Sherco 125SE-R

  • Frequency:– Sherco recommends changing the oil frequently, especially under hard riding or racing conditions. Consult your user manual for factory intervals, but consider every 10–20 engine hours as a safe practice.
  • Proper Disposal:– Never pour used oil onto the ground or into the trash—responsibly recycle your oil and filter.
  • Crush washers:– Always have a few spare crush washers on hand; a leaking plug is often traced to an old washer.

Conclusion

Regular gearbox oil changes on your 2023 Sherco 125SE-R keep your transmission shifting smoothly and protect expensive internal components. MotoSport.com is here to equip you with the tools, oil, and expertise for every ride. Check the site for oil, tools, maintenance kits, and exclusive how-to content for your bike.

Related Shopping Categories

Shop Motor Oil for a 2023 Sherco 125SE-R Dirt Bike.

Shop Oil Filters for a 2023 Sherco 125SE-R Dirt Bike.

Shop Oil Drain Pans for a 2023 Sherco 125SE-R Dirt Bike.

Shop Tools for a 2023 Sherco 125SE-R Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2023 Sherco 125SE-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.