How to Change the Oil in a 2020 Beta 125 RR Race

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As a proud owner of the 2020 Beta 125 RR Race, keeping your transmission oil fresh is essential for slick shifting and long engine life. The process differs from modern 4-strokes and other two-stroke modelsplus, the Race model does not have oil injection, so pay close attention to your pre-mix fuel system as well.

Tools & Supplies Needed

  • Metric socket set
  • Oil catch pan
  • Rag or shop towels
  • Transmission oil: Motul Transoil Expert 10w40 or equivalent
  • Measuring cup or beaker (720 mL recommended fill volume)
  • Replacement crush washer (optional but recommended)

Step-by-Step Oil Change Guide

  1. Warm Up the Bike
    Start the engine and let it idle for 2–3 minutes to thin the oil for easier draining. Place the bike on a stand so it sits upright and level.
  2. Remove the Skid Plate (if equipped)
    Loosen and remove the skid plate bolts to allow better access to the drain plug.
  3. Locate the Drain Plug
    The drain bolt is on the bottom of the right side crankcase, accessed below the engine. Place an oil pan underneath to catch old fluid.
  4. Drain Old Oil
    Using the appropriate size socket, remove the drain plug and let the old transmission oil drain completely.
    Inspect the crush washerreplace it if worn or damaged.
  5. Reinstall Drain Plug
    Wipe the area clean, install the drain plug with the crush washer, and tighten to manufacturer's torque specification.
  6. Refill Oil
    Locate the oil fill cap (typically behind your right boot area on the crankcase).
    Add 720 mL of transmission oil. Use a measuring cup for precision.
    Replace oil cap securely.
  7. Verify Oil Level
    There is a check bolt behind the brake pedal return spring. With the bike upright and level, remove this bolt. Oil should just trickle from the openingif not, add until it does and reinstall the bolt.– Key Beta check feature
  8. Reinstall Skid Plate
  9. Clean Up
    Dispose of old oil properly at a recycling center.

Model-Specific Notes for the 2020 Beta 125 RR Race

  • No oil injection: Always use pre-mix fuel at the ratio specified by Beta (typically 40:1 with high-quality 2T oil).
  • Transmission oil capacity varies slightly between regular oil changes (720 mL) and full engine rebuilds (higher fill volume)the provided measurement is for standard service.
  • Check all major fasteners after your first few rides, especially if new or recently serviced. This includes rear sprocket bolts and footpeg mounts.
  • Only use transmission oil designed for two-stroke gearboxesautomotive oils can affect clutch performance or longevity.
  • Beta 125 RR Race models are built for competitive off-road usemaintaining oil changes at short intervals (use hour meters or every 10–20 hours under race conditions) is recommended.

With fresh oil and routine checks, your 2020 Beta 125 RR Race will deliver sharp shifting and reliable performance on 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.