How to Change the Oil in a 2022 SHERCO 125SE-R

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This detailed guide, proprietary to MotoSport.com, covers how to change the oil in a 2022 SHERCO 125SE-R. This model is a two-stroke enduro motorcycle requiring routine transmission (gearbox) oil changes to maintain longevity and performance. Unlike four-stroke engines, a two-stroke like the 125SE-R doesn’t use engine oil for the combustion process, but it does need fresh gear oil for its transmission.

Tools & Supplies Needed

  • Socket wrench set (including appropriate sizes for drain and filler bolts, typically 8mm – 17mm)
  • Drain pan
  • Funnel
  • Measuring cup (to measure precise oil volume)
  • Rags or shop towels
  • New gearbox oil (SAE 5W40, use 500ml as specified for the 125SE-R)
  • Gloves (recommended for cleanliness)
  • Replacement crush washer for the drain bolt (recommended)
  • Bike stand (for stability during the procedure)

Step-by-Step Oil Change Instructions

  1. Warm Up the Bike (Optional but Helpful)
    Briefly start and run your SHERCO 125SE-R for a couple of minutes. This helps the gear oil warm, thin, and drain out more efficiently.
  2. Secure the Bike on a Stand
    Place the bike on a stable stand. Ensure it is upright, so the oil drains completely and refill is at the correct level.
  3. Locate the Transmission Drain Bolt
    The oil drain bolt (sometimes called the gear oil vent or gear box drainage plug) is positioned underneath the engine. Consult your owner's manual for the precise location if needed. For the 2022 125SE-R, it is typically under the crankcase, easily accessible with the bike upright.
    Callout: Pay close attention to the crush washer on the drain bolt—replace it if damaged for optimal sealing.
  4. Drain the Old Gear Oil
    Place your drain pan below the drain bolt area. Use the socket wrench to carefully loosen and remove the bolt. Allow the old oil to drain fully—this may take about 10 minutes. Tilt the bike slightly side-to-side to ensure a thorough drain if necessary.
    Model-Specific Tip: Only release the gear oil, as two-stroke engines do not use engine oil for internal lubrication.
  5. Inspect the Old Oil
    Check for any metallic debris or an unusual milky color that could indicate contamination or a mechanical issue. Clean the drain bolt thoroughly.
  6. Reinstall the Drain Bolt
    Before reinstalling, fit a new crush washer if needed. Thread the bolt by hand first to avoid cross-threading, then use the socket wrench to snug it. Do not overtighten—refer to your service manual for specific torque specs if needed (typical range for a small bolt is 8–12 Nm).
  7. Remove the Gearbox Filler Cap
    The filler cap is generally located on the side of the engine casing higher than the drain bolt.
  8. Add New Gear Oil
    Insert a clean funnel into the filler hole. Pour in exactly 500ml of SAE 5W40 transmission oil as specified in the 2022 workshop manual. Use a measuring cup for accuracy. Do not overfill, as excess oil can increase pressure and cause leaks.
  9. Replace the Filler Cap and Clean Up
    Wipe away any spilled oil and reinstall the filler cap securely.
  10. Check the Oil Level
    Some SHERCO models have a sight glass or dipstick on the gearbox side to confirm the oil is at the correct level. If not, rely on the measured volume. Run the engine briefly, shut it down, and check for leaks at the drain and filler bolts.
  11. Dispose of Used Oil Safely
    Pour the old oil into a sealed container and take it to a recycling or hazardous waste collection facility. Never pour oil on the ground or down a drain.

Specific Call-Outs for 2022 SHERCO 125SE-R Owners

  • Oil type and capacity: Always use the recommended 500ml of SAE 5W40 gear oil. The wrong oil type or quantity can diminish clutch and gear performance or cause undue wear.
  • Drain bolt and crush washer: Damaged or reused crush washers may cause leaks. Replace with OEM or high-quality equivalents at each oil change.
  • Gearbox oil only: Two-stroke SHERCOs like the 125SE-R use premixed fuel for top-end lubrication. Only transmission oil needs to be changed regularly.
  • Frequency of oil changes: Riding in aggressive, muddy, or wet conditions may require more frequent changes than the manufacturer’s interval, which can range between 20 to 40 hours of use depending on riding style.
  • Use a quality funnel: The filler location can be tight; a small funnel reduces spillage and mess.

Conclusion

Performing regular oil changes on your 2022 SHERCO 125SE-R preserves its performance and reliability. Always use high-quality oil, measure accurately, and check your work for leaks. Following these steps keeps your enduro machine ready for every ride.

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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.