How to Change the Coolant in a 2017 Beta 390 RR-S

Shop parts for a 2017 Beta 390 RR-S Dirt Bike.

Regular coolant changes are key to keeping your 2017 Beta 390 RR-S running cool and prolonging engine life. This guide breaks down every step for a professional-level coolant swap, plus model-specific details and tips every Beta owner should know.

Tools – Supplies Needed

  • Fresh coolant (use only the type recommended in your owner manual)
  • Drain pan
  • Socket set and screwdriver
  • Protective gloves and eyewear
  • Torque wrench (for reassembly torque specs)
  • Rags

Important Precautions for the 390 RR-S

  • Never attempt this job with a hot engine. Wait until it is fully cooled to avoid burns and injury.
  • Wear protection—coolant is hazardous to skin, eyes, and clothing. If contact occurs, flush immediately with water and follow medical advice if needed.
  • Coolant is toxic. Keep out of reach of children and dispose of used coolant in accordance with local regulations.

Step-by-Step Coolant Change Procedure

  1. Park and Prepare
    Secure the bike upright on a level surface. Remove the engine protection plate by loosening its mounting screws, if equipped. Let the engine cool completely before starting.
  2. Access the Radiator
    Remove the seat and, if necessary, side panels for clear radiator access. Locate the radiator filler cap and the coolant drain screw at the lowest point on the engine (often at the water pump housing).
  3. Drain the Coolant
    Place a drain pan under the engine. Slowly unscrew the radiator cap to release any pressure. Next, remove the coolant drain screw (look for a copper washer—replace if damaged) and allow all fluid to drain completely.
    Once drained, reinstall and torque the drain screw to spec (typically 10Nm).
  4. Flush System (Optional but Recommended)
    For best results, briefly fill the system with distilled water, reinstall the cap and run the engine for just a minute (do not let it get hot). Drain again. This removes old residue.
  5. Refill with Fresh Coolant
    Pour in the recommended type and volume of coolant. For the 2017 390 RR-S, use only approved radiator coolant—check your manual for the exact product and fill level.
  6. Bleed Air from the System
    Replace the radiator cap. Start the engine and let it idle with the bike upright, watching for air bubbles. Once the thermostat opens, any trapped air should purge out. Stop and let everything cool. Recheck and top off coolant as needed—always to the base of the filler neck.
  7. Reassemble
    Refit the engine protection plate and side panels, torque all fasteners to spec.
  8. Final Checks
    Inspect all connections, ensure no leaks, and confirm the coolant level is correct when cold.

Specific Notes for the 2017 Beta 390 RR-S

  • The 390 RR-S uses a total system capacity of approximately 1.3L–check and adjust as needed after your first heat cycle.
  • Beta recommends annual coolant changes for best protection, especially if riding frequently or in challenging environments.
  • Always use the original specification coolant to safeguard the high-performance aluminum engine and prevent corrosion.
  • The radiator and water pump are easily accessible, making maintenance straightforward for this model.

Owner's Tips & Reminders

  • Never operate the bike without coolant or with low coolant levels.
  • After bleeding air, always check the level again after your first ride.
  • If you observe frequent coolant loss after a proper change, check for leaks around the water pump and hose connections – a common maintenance check for the RR-S series.

Related Shopping Categories

Shop Radiators for a 2017 Beta 390 RR-S Dirt Bike.

Shop Coolant for a 2017 Beta 390 RR-S Dirt Bike.

Shop Temperature Sensors for a 2017 Beta 390 RR-S Dirt Bike.

Shop Tools for a 2017 Beta 390 RR-S Dirt Bike.

Shop Radiator Hoses for a 2017 Beta 390 RR-S 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.