How to Change the Coolant in a 2020 Beta 350 RR-S: Step-by-Step Guide

Shop parts for a 2020 Beta 350 RR-S Dirt Bike.

Routine coolant changes are essential to keep your 2020 Beta 350 RR-S running cool – especially during hard rides and extreme weather. Follow this comprehensive MotoSport guide for a safe and effective coolant replacement on your Beta 350 RR-S, along with model-specific notes you won't want to miss.

What Makes the 2020 Beta 350 RR-S Coolant System Unique?

  • The bike uses a 1.3-liter liquid-cooled system specifically engineered for high-performance enduro conditions.
  • OEM recommendations specify using a high-quality coolant compatible with aluminum radiators to prevent corrosion & maintain the water pump.
  • The radiator cap and drain bolt positions are easy to access, but the bike should always be completely cooled before service to avoid burns and pressure injuries.

Before You Start: Gather Your Tools & Parts

  • Fresh, compatible engine coolant (consult your owner's manual for specifications)
  • Socket set & screwdrivers
  • Catching pan for old coolant
  • Clean rags or shop towels
  • Protective gloves and eye protection

Step 1 – Prepare Your 350 RR-S

Make sure the bike is upright in a well-ventilated area. The engine and cooling system must be completely cool before opening. Remove the seat, and if necessary, detach the shrouds for easier access to the radiator cap and drain bolt.

Step 2 – Drain the Old Coolant

  • Locate the radiator cap and slowly loosen it to relieve any residual pressure – never open it when hot.
  • Position a drain pan under the water pump area.
  • Locate and remove the coolant drain bolt (often found on the bottom of the water pump cover on the right side of the engine).
  • Let the coolant fully drain.
  • Optional: Gently tilt the bike or briefly loosen lower hoses to ensure complete drainage (only if necessary).

Step 3 – Inspect & Clean

  • Check the drained coolant for excessive debris or oil contamination – these may indicate other issues requiring attention.
  • Clean the area around the filler neck and drain bolt to keep grit out of your cooling system.

Step 4 – Reinstall the Drain Bolt

Replace and securely tighten the drain bolt. If it uses a crush washer, inspect for damage and replace as needed to ensure a tight seal.

Step 5 – Fill with New Coolant

  • Slowly pour coolant into the radiator until it reaches the base of the filler neck. The capacity for this model is 1.3 liters.
  • Replace the radiator cap loosely at first.
  • Briefly start the engine (with the cap loose) and let it idle for a minute to help purge air bubbles.
  • Turn off the engine, let it cool completely, then check and top off the coolant if needed.

Step 6 – Bleed & Check for Air

  • After the first heat cycle, let the engine fully cool.
  • Remove the radiator cap and inspect the level. Air bubbles can cause the level to drop after the first cycle.
  • If needed, top up the radiator to the base of the filler neck and the expansion reservoir.

Step 7 – Inspect for Leaks & Reassemble

  • Double-check all bolts and hoses for tightness.
  • Start and warm up the bike, then inspect for any drips or seepage around the drain plug, hoses, and radiator seams.
  • Reinstall the shrouds and seat, and wipe away any spilled coolant from the bike.

Special Tips for 2020 Beta 350 RR-S Owners

  • Always use coolant compatible with aluminum–magnesium alloy systems to avoid internal corrosion.
  • Do not substitute water for extended use – proper anti-boil protection is essential for engine longevity.
  • Bleeding the system properly is critical on this engine; remaining air pockets can cause overheating.
  • Change coolant every one to two years regardless of hours if you ride in hot, dusty, or wet conditions for optimal longevity.

Disposal

Dispose of old coolant responsibly at your nearest recycling facility.

Riding Peace of Mind

With your 2020 Beta 350 RR-S coolant fresh and system bled, you're ready to hit the trails confidently—backed by MotoSport.

Related Shopping Categories

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Shop Radiator Hoses for a 2020 Beta 350 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.