How to Change the Coolant in a 2019 Beta 300 RR: Step-by-Step Guide

Shop parts for a 2019 Beta 300 RR Dirt Bike.

Maintaining the coolant in your 2019 Beta 300 RR is essential for peak performance and engine longevity. This unique Italian two-stroke features forced liquid circulation by pump, keeping it cool during aggressive trail rides and enduro racing. Follow this MotoSport exclusive guide for a seamless coolant change – with tips specific to your 300 RR.

Tools & Supplies You'll Need

  • Phillips and flathead screwdrivers
  • 8 mm & 10 mm sockets or wrenches
  • Drain pan (minimum 2 liters capacity)
  • Fresh engine coolant (consult the owner's manual for recommended type)
  • Shop rags
  • Funnel (narrow spout for radiator neck)
  • Protective gloves

Key Points for the 2019 Beta 300 RR

  • No radiator bleeder screw – Introduced on older Betas, but not on 2019+ models. Bleeding relies on rocking the bike and running the engine after refill.
  • The system capacity is slightly over 1 liter. It's best to have a little extra coolant on hand for top-off.
  • Always check coolant level above the radiator fins after running and cycling coolant through both radiators.

Step 1: Preparation

  • Ensure the motorcycle is on a stand, engine cool, and in a well-ventilated space.
  • Remove the seat and right side panel for clear access to the radiators.

Step 2: Draining the Old Coolant

  • Locate the coolant drain bolt at the bottom of the water pump cover (right side of the engine).
  • Position a drain pan underneath, then remove the drain bolt and allow coolant to fully drain.
  • Remove the radiator cap to assist with drainage.

Step 3: Flushing (Optional, But Recommended)

  • For best maintenance, flush the cooling system by adding distilled water and running the engine briefly (do not let it overheat), then drain again.
  • Repeat until the fluid runs clear.

Step 4: Refilling with New Coolant

  • Reinstall and tighten the drain bolt. Do not overtighten – snug is sufficient to avoid damaging the seal.
  • Fill the radiator slowly with fresh coolant up to just above the core (where you see the fins).
  • Gently rock the bike side-to-side – this helps release trapped air and distribute coolant through both radiators.
  • If the level drops, top it off again.

Step 5: Bleeding the Cooling System

  • Without a bleeder screw, manually bleed air by rocking the bike and squeezing the coolant hoses.
  • Start the engine with the cap off and let it idle for 30–60 seconds (do not allow the coolant to overflow or the engine to overheat).
  • Turn off engine, let coolant settle, and top off again if needed.
  • Install radiator cap securely.

Step 6: Final Checks

  • Reinstall the right side panel and seat.
  • After your next ride, check the coolant level again – top off if necessary.
  • Proper disposal of old coolant is crucial – always follow local regulations.

Special Notes for 2019 Beta 300 RR Owners

  • No radiator bleeder screws – rocking the bike and running engine is essential for complete air purging.
  • Check for leaks at hoses and water pump after refill.
  • Inspect the water pump weep hole; fluid here may indicate a seal issue.
  • The 300 RR uses a high-output cooling system designed for tough rides. Overheating usually means low coolant, air in the system, or radiator blockage – not normal use.

Regular coolant changes on your Beta 300 RR protect against overheating and maximize the lifespan of your two-stroke's high-performance engine. If you need specific replacement parts, gaskets, or OEM coolant, MotoSport has you covered:

Shop parts for a 2019 Beta 300 RR Dirt Bike.

Related Shopping Categories

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Shop Radiator Hoses for a 2019 Beta 300 RR 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.