How to Change the Oil in a 2024 Beta 390 RS

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Keeping your 2024 Beta 390 RS in peak performance starts with regular oil changes. The unique dual chamber lubrication system–with separate engine and transmission oil compartments–makes the Beta different from many other dirt bikes. Following the correct procedure and using the right oil volume is essential for longevity and smooth operation. Below is the step-by-step MotoSport proprietary guide for changing both the engine and transmission oil on your Beta 390 RS.

Essential Tools & Items

  • 8mm socket (for oil filter cover bolts)
  • 13mm socket (for drain bolts)
  • Drain pan
  • Fresh oil: Liqui Moly 10W-50 (or recommended equivalent)
  • New oil filter (and cover O-ring if needed)
  • New drain bolt O-rings
  • Torque wrench (recommended for reinstalling bolts to the correct spec)
  • Shop towels

Step-by-Step Oil Change Instructions

  1. Warm the engine: Run your Beta 390 RS for a couple of minutes to allow the oil to warm up, which aids in thorough drainage.
  2. Remove the skid plate if installed, to access the underside of the engine.
  3. Drain engine oil: Place a drain pan under the engine. Remove the 13mm engine oil drain bolt and allow the oil to fully drain.
    – Inspect and replace the drain bolt O-ring if worn.
  4. Drain transmission oil: Locate and remove the 13mm transmission oil drain bolt. Allow it to drain completely.
    – Replace the O-ring if needed.
  5. Remove oil filter: Using an 8mm socket, remove the two bolts from the oil filter cover. Remove the cover, O-ring, and oil filter. Leave the filter cover off for a few minutes to increase drainage.
  6. Install new parts: Install a new oil filter (open end faces into the engine, solid end faces outward). Install a new cover O-ring if provided. Reinstall the cover and torque to 10 Nm.
  7. Reinstall drain bolts: Install new O-rings as required. Torque the engine oil drain bolt to 15 Nm – torque the transmission drain bolt to 20 Nm.
  8. Refill oil:
    • Pour 750ml of 10W-50 oil into the engine side.
    • Pour 750ml of 10W-50 oil into the transmission side.
    Always use a funnel for accuracy and mess prevention.
  9. Replace filler cap O-rings if possible, then reinstall and tighten caps securely.
  10. Check oil levels:
    • For transmission: Use the oil check bolt – oil should reach the bottom of the threads (check after letting the bike sit for a few minutes).
    • For engine: With the bike idling at temperature, oil should register in the middle of the sight glass window. Note that the unique Beta sight glass reading is accurate only while running.

Special Notes Specific to the 2024 Beta 390 RS

  • Dual oil circuits: The 390 RS uses separate oil systems for the engine and transmission, each requiring 750ml of oil–do not mix up the fill points or capacities.
  • Sight glass reading: For the engine, verify oil through the sight glass while the engine is running and warm–not just after shutdown. This differs from most bikes where oil is checked at rest.
    Expect oil to show at mid-window at idle–if not, add oil incrementally.
  • Change intervals: Beta recommends more frequent oil changes under hard use–adjust your maintenance schedule if you ride aggressively or in dusty conditions.
  • Genuine parts: Always match oil filters and O-rings to your MMY (Model, Make, Year) to prevent leaks or pressure complications unique to the Beta's design.

Final Check and Reassembly

  • Start the engine and inspect for any leaks around the drain bolts and filter cover.
  • Double-check oil levels with the procedures above, and top up as required.
  • Reinstall your skid plate.
  • Properly dispose of old oil and filters in accordance with local regulations.

Routine, correct oil changes are central to getting the maximum performance and reliability out of your 2024 Beta 390 RS. With proprietary guidance from MotoSport, you can keep your bike ready for every adventure.

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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.