How to Change the Coolant in a 2012 Beta 350 RS

Shop parts for a 2012 Beta 350 RS Dirt Bike.

Regularly changing the coolant in your 2012 Beta 350 RS is essential for engine health, optimal temperature control, and overall longevity. Below is a proprietary MotoSport guide for flushing & replacing the coolant on your Beta 350 RS, including any must-know tips unique to this model year and engine.

Why Coolant Change Is Important

  • Prevents overheating and costly engine damage
  • Protects aluminum parts and radiator from corrosion
  • Maintains proper operating temperature for both enduro and dual-sport use

Tools & Supplies Needed

  • 8mm and 10mm sockets (or as needed for radiator shrouds/drain bolts)
  • Flat-head screwdriver
  • Coolant rated for aluminum engines (Beta recommends premium motorcycle coolant)
  • Drain pan
  • Funnel
  • Distilled water (for flushing if desired)
  • Shop rags or paper towels
  • Protective gloves and eye wear

Step-by-Step Coolant Change Procedure

  1. Let the bike cool completely.
    Never open the radiator cap when the engine is hot. The system is pressurized and can cause severe scalds.– Always let the bike cool thoroughly.
  2. Remove seat and radiator shrouds.
    Locate the radiator cap and access it by removing necessary plastics. On the 2012 Beta 350 RS, these are simple to remove with a few bolts.
  3. Place a drain pan beneath the water pump.
    Locate the coolant drain bolt on the side of the engine–usually the lowest bolt on the water pump cover.
  4. Open the radiator cap.
    Slowly open the cap to release any residual pressure.
  5. Remove the drain bolt and drain the coolant.
    Remove the coolant drain bolt and allow old coolant to fully drain into your pan. Some coolant may remain in lower hoses; tilt the bike gently to help clear all fluid.
  6. Flush (optional).
    For a thorough job, fill the radiators with distilled water, reinstall the drain bolt, briefly run the engine, then repeat the drain process. This step removes residual old coolant and debris.
  7. Reinstall the drain bolt.
    Ensure the sealing washer is in good condition; tighten the bolt to manufacturer specs.
  8. Pour new coolant into the radiator.
    Use a funnel to avoid spills. Slowly fill until coolant reaches just below the base of the filler neck–do not overfill. The system capacity is just over 1L. Top off the expansion tank if equipped.
  9. Bleed the system.
    With the radiator cap off, lean the bike from side to side to help trapped air escape. Squeeze radiator hoses gently. Some users prefer to briefly start the engine with the cap off; observe for bubbles and add coolant as needed.
  10. Reinstall the radiator cap and shrouds.
    Secure all plastics. Wipe up any spills to prevent stains or slipping hazards.
  11. Heat cycle and re-check levels.
    Start the engine and let it reach operating temperature. Allow to cool, then check and top off the coolant if necessary.

Important Notes for the 2012 Beta 350 RS

  • This model uses a pressurized cooling system, so air removal is especially important—trapped air can cause overheating.
  • Never mix different types of coolant brands–use a premium DOT-approved, silicate-free coolant recommended for aluminum engines.
  • Beta's recommended coolant volume is just above 1 liter; avoid overfilling the system.
  • Inspect all hoses and the radiator cap for wear–replace if they show cracking or leakage. The radiator cap is key to maintaining proper pressure.
  • If you do aggressive off-road riding, consider installing an aftermarket fan kit for enhanced cooling in tight or technical terrain.
  • Always check the coolant level before each ride. If you notice repeated loss, inspect for leaks–pay attention to hose clamps, the water pump, and the radiators themselves.

Final Tip

Perform your coolant change once a year or after every season of hard riding. If you ride in extreme climates or competition, inspect and replace more frequently to ensure reliable performance and engine safety.

Related Shopping Categories

Shop Radiators for a 2012 Beta 350 RS Dirt Bike.

Shop Coolant for a 2012 Beta 350 RS Dirt Bike.

Shop Temperature Sensors for a 2012 Beta 350 RS Dirt Bike.

Shop Tools for a 2012 Beta 350 RS Dirt Bike.

Shop Radiator Hoses for a 2012 Beta 350 RS 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.