How to Change the Coolant on a 2011 Beta 520 RS SM

Shop parts for a 2011 Beta 520 RS SM Dirt Bike.

Routine coolant changes are essential to keep your 2011 Beta 520 RS SM running strong and protected from corrosion, overheating, and premature engine wear. This model's high-performance, dual-sport design means it can encounter a range of riding conditions–hot, cold, dusty, and muddy environments stitch together into the average year. For Beta owners, protecting the all-aluminum engine is especially important, as improper coolant or infrequent changes can lead to damage.

What You'll Need

  • Silicate-free motorcycle coolant (pre-mixed for aluminum engines is preferred)
  • Basic tool kit (ratchet, socket set, drain pan)
  • Funnel
  • Rags for cleanup
  • Distilled water (for optional flush)
  • Gloves and protective eyewear

Preparation

  • Let the engine cool completely. Never open the radiator cap when hot.
  • Stand the bike upright on a level surface, ideally on a motorcycle stand.

Step 1: Drain the Old Coolant

  • Locate the radiator cap and the coolant drain bolt (usually on the lower part of the water pump cover).
  • Place a drain pan underneath the bike.
  • Slowly remove the radiator cap to release any pressure.
  • Remove the coolant drain bolt and allow the old coolant to fully drain from the system.
  • Don't forget to check and drain the overflow tank if equipped; some bikes may require removing the tank to completely empty and clean it.

Optional: Coolant System Flush

  • Refit the drain bolt and fill the system with distilled water (and a system-safe radiator flush if the cooling system is dirty).
  • Start the engine and let it idle until thermostat opens (engine warms up), then shut it off.
  • Drain the system again to remove distilled water or flushing mix.
  • Repeat if needed until flushed water runs clear.

Step 2: Inspect Components

  • Check radiator hoses for age, cracks, or brittleness–they should be pliable and undamaged.
  • Inspect and carefully straighten any bent radiator cooling fins; avoid causing leaks.
  • Check hose clamps and radiator cap for tightness and wear; replace if needed.

Step 3: Add New Coolant

  • Reinstall the drain bolt securely.
  • Fill the radiator slowly with a high-quality, silicate-free, premixed coolant formulated for aluminum engines. Beta specifies non-silicate coolant to protect internal components.
  • Pause to let air pockets escape. Gently squeeze radiator hoses to help purge trapped air.
  • Continue filling until the coolant reaches the base of the filler neck.
  • Fill the overflow reservoir to the full line.

Step 4: Bleed the System & Check Levels

  • With the radiator cap off, start the engine and let it idle a minute. Watch for bubbles in the neck, indicating trapped air escaping.
  • Turn off the bike and allow it to cool.
  • Double-check and top off coolant if needed; fill only to designated marks–do not overfill.
  • Install the radiator cap securely.
  • Check for leaks around bolts, caps, and hoses.

After Service: First Ride and Re-Check

  • Take the 520 RS SM on a short, gentle ride, then let the bike cool down.
  • Re-check overflow reservoir and radiator levels. Top off if they've dropped due to additional air being purged (this is normal).

Beta 520 RS SM Model-Specific Notes

  • Coolant Capacity: Expect the system to require just over 1 liter, but not as much as 1.3 liters–top off after running the engine as some coolant will settle into hoses and the engine block.
  • Annual Change: For optimal performance, owners recommend changing the coolant annually, especially if riding in extreme conditions.
  • Cooling System Health: The RS SM's system is robust, but always use the OEM-spec radiator cap and check system integrity before and after change.
  • Premixed Only: Avoid concentrate coolants that require tap water–always use distilled or a tested premix designed for motorcycles.

Changing your coolant on schedule is a key part of keeping your 2011 Beta 520 RS SM's high-output engine running at peak levels, whether carving canyons or crawling rocky single-track. Prioritize the right coolant and regular inspection for years of reliable riding.

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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.