Changing the Coolant on a 2023 Beta 390 RR-S: A Step-by-Step MotoSport Guide

Shop parts for a 2023 Beta 390 RR-S Dirt Bike.

The 2023 Beta 390 RR-S is a modern, street-legal dual sport engineered for rideability and versatility. Featuring an updated ECU with traction control, precision-tuned suspension, and a liquid-cooled, four-stroke single, it's vital to maintain the cooling system for optimal performance and reliability. Regular coolant changes protect the titanium valves, cylinder head, and advanced engine mapping’s efficiency, especially during demanding rides. Here’s how to change the coolant in your 2023 Beta 390 RR-S, ensuring peak performance and longevity.

Required Tools & Materials

  • Fresh, motorcycle-rated coolant (silicate-free, pre-mixed or distilled water for mixing if concentrate)
  • 8 mm and 10 mm sockets or wrenches
  • Flathead screwdriver
  • Catch pan for old coolant
  • Funnel
  • Clean shop towels
  • Gloves and eye protection

Step 1: Prepare the Bike

  • Ensure the engine is completely cool before beginning.
  • Position the bike upright on a stand for stability and level drainage.
  • Remove the right side shroud and, if desired, the skid plate for better access to the coolant drain bolt on the water pump.

Step 2: Drain the Old Coolant

  • Place the catch pan under the water pumplocated on the lower right engine side.
  • Remove the radiator cap to allow air in and speed draining.
  • Using an 8 mm or 10 mm socket, remove the coolant drain bolt (sometimes marked as a lower bolt on the water pump cover).
  • Allow coolant to fully drain. Tilt the bike gently L-R to ensure all old fluid escapes.

Step 3: Inspect & Clean

  • Inspect the drain bolt and sealing washer for wear or damagereplace if necessary.
  • Wipe away old coolant residue from the drain area and surrounding engine parts using a clean rag.

Step 4: Reinstall Drain Bolt

  • Reinstall the drain bolt and torque to manufacturer specavoid over-tightening, as the cover is aluminum.

Step 5: Refill with Coolant

  • Using a funnel, slowly pour fresh coolant into the radiator filler neck until just below the bottom of the cap lip.
  • Once filled, gently squeeze the radiator hoses to release trapped air bubbles.
  • Allow coolant to settle and top off if necessary.

Step 6: Bleed the System

  • Start the engine and let it idle with the radiator cap offwatch for the coolant level to drop as trapped air escapes (avoid high revs while bleeding).
  • Add more coolant if air burps reduce the level.
  • Once bubbling stops and coolant is steady, turn off the engine and install the cap snugly.

Step 7: Reassemble and Check for Leaks

  • Reinstall any shrouds or the skid plate you removed earlier.
  • Wipe down the engine and check for any seepage at the drain bolt, radiator, or hoses.

Particulars About the 2023 Beta 390 RR-S

  • The advanced ECU mapping and Titanium valves make it critical to use only high-quality, silicate-free motorcycle coolant.
  • The radiator design and tight chassis mean draining can be slower due to kinked hose positionsbe patient for complete evacuation.
  • The 390 RR-S features a Trail Tech Voyager GPS; avoid spilling coolant on the electronics mounted nearby on the handlebar cluster.
  • Beta’s unique aluminum body Sachs shock and linkage provide superior suspensioncoolant changes help avoid engine overheating, protecting both engine and suspension performance.
  • Dual sport setups mean you may ride in mixed conditions; consider coolant flushes more often if exposed to mud, sand, or deep water crossings.

Final Notes

  • Dispose of coolant responsibly at a recycling centerdo not pour down drains or on the ground.
  • Check coolant level and inspect for leaks after your next ride.
  • Changing the coolant at least annually helps prevent overheating and internal corrosion, ensuring your Beta 390 RR-S runs at its best.

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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.