How to Change the Oil in a 2019 Beta 390 RR-S: Step-by-Step Guide – MotoSport Exclusive

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Changing the oil in your 2019 Beta 390 RR-S is one of the most essential maintenance tasks for ensuring your dual-sport bike delivers the exceptional performance and reliability Beta is known for. The 390 RR-S, like other Beta four-strokes in its class, features both engine and transmission oil systems – each with unique fill and drain procedures. Follow this MotoSport step-by-step guide for a hassle-free oil change process, and get key tips unique to your bike model.

What Makes the 2019 Beta 390 RR-S Oil Change Unique?

  • Separate engine and transmission oils: The 390 RR-S uses dedicated oils for the engine and the gearbox. Do not mix or overfill – follow instructions closely for each side.
  • Oil quantity and specs: Refer to your owner's manual for exact volumes and recommended oil type. Beta typically specifies an engine oil (e.g. 15W-50 synthetic) and a transmission oil (consult manual for viscosity and type).
  • Site glass & check bolt: The engine oil is checked with the site glass while running; the gearbox oil is checked with the level bolt.

Tools & Supplies Needed

  • Correct oil (see manual or MotoSport catalog for recommended types)
  • New oil filter
  • Drain pans (for engine and gearbox oils)
  • Socket set
  • Torque wrench
  • Rags & gloves

Preliminary Steps

  • Start and warm up your engine for 2–3 minutes to thin the oil, making it easier to drain.
  • Turn off the bike and stabilize it upright on a flat surface.

Draining and Replacing Engine Oil

  1. Locate the engine oil drain bolt and position your first drain pan underneath.
  2. Carefully remove the drain bolt. Allow all oil to drain.
  3. Remove the engine oil filler cap to speed up draining.
  4. Remove the oil filter cover (typically on the same side as the oil glass window) and replace the oil filter.
  5. Install a new filter, ensuring it is seated correctly.
  6. Reinstall and torque the drain bolt to manufacturer specs (usually around 20 Nm – check your owner's manual).
  7. Add the recommended amount and type of engine oil. Start the engine and check that the oil level sits in the middle of the site window while running.

Draining and Replacing Gearbox (Transmission) Oil

  1. Locate the gearbox drain bolt (it will be on the opposite side of the engine oil drain).
  2. Place your second drain pan and carefully remove the bolt.
  3. Once drained, reinstall and torque the drain bolt.
  4. Add new transmission oil through the appropriate fill cap per your manual's specifications.
  5. Check the oil level using the inspection bolt – oil should reach the lower edge of the inspect hole.

Final Steps and Startup

  • Double-check that all bolts and caps are tight and to spec.
  • Clean any spilled oil and inspect for leaks.
  • Start the bike, let it idle, and verify proper oil levels one last time.

Owner Tips for the 2019 Beta 390 RR-S

  • Never confuse engine and gearbox oils – they serve separate systems with different requirements.
  • The 390 RR-S is sensitive to oil level for both performance and clutch longevity. Always use the site glass and check bolt as specified.
  • Use only high-quality filters and oils to maintain Beta's engine protection and shifting feel.
  • Inspect the magnetic drain plugs for metallic debris during each change – excess metal could signal internal wear.

Ready to perform your oil change or need quality parts? Shop parts for a 2019 Beta 390 RR-S Dirt Bike!

Keeping your 2019 Beta 390 RR-S at peak performance is easy with regular oil changes and parts sourced from MotoSport–your ride, your adventure, your choice!

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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.