How to Change the Coolant in a 2013 Beta 350 RS

Shop parts for a 2013 Beta 350 RS Dirt Bike.

Maintaining the cooling system on your 2013 Beta 350 RS is essential for optimum performance and longevity on and off the trail. To keep your engine running smooth, it is recommended to change the coolant annually or at least every third year – depending on your riding conditions. Follow this proprietary MotoSport coolant change guide tailored specifically for Beta owners.

Before You Begin

  • Only perform coolant maintenance when the engine is completely cold. The cooling system is pressurized when hot and removing the cap can cause severe burns – always check coolant when cold .
  • Prepare a catch pan, a funnel, fresh coolant (OEM or high-quality pre-mix), a soft rag, safety gloves, and any necessary replacement parts (hose clamps, radiator cap).
  • For 2013 models, you may encounter a radiator bleeder screw on the right radiator. Use this for air removal if the system is equipped .

Step-by-Step Coolant Change Instructions

  1. Remove the radiator cap.
    • Locate cap A on top of the radiator. Unscrew gently. If equipped, also locate the bleeder screw on the right radiator (common on 2012–2014 models) .
  2. Drain old coolant.
    • Place your catch pan under the lowest coolant hose connection. Remove the drain bolt/hose at the base of the radiator or near the water pump. Allow coolant to fully drain. Dispose of old coolant properly; it is toxic to pets and wildlife.
  3. Flush the system (optional but recommended).
    • If coolant quality is questionable, flush the system with distilled water. Reattach hoses, fill with distilled water, then run the engine briefly. Drain out the flush water entirely before refilling with new coolant .
  4. Inspect hoses & clamps.
    • Before refilling, check for damaged hoses or loose clamps – especially around the base of both radiators. On Beta dirt bikes, factory assembly sometimes leaves hose clamps under-tightened. Correct this before refilling .
  5. Fill with new coolant.
    • Carefully pour fresh coolant into the radiator until just above the internal fins, or per the marking in the owner's manual . Do not overfill. For the 350 RS, capacity is approximately 1 liter.
    • If equipped, briefly loosen the bleeder screw until coolant emerges bubble-free, then tighten securely.
  6. Start & heat cycle the engine.
    • Reinstall the radiator cap. Start the engine and let it reach normal operating temperature (fan may come on). Shut down, then allow the engine to cool fully back to ambient temperature .
  7. Re-check coolant level.
    • Remove the radiator cap and verify that coolant covers the fins and sits at the base of the filler neck. Top off if needed. Also check the expansion (overflow) tank level.
  8. Final inspection for leaks.
    • Check around every hose connection, especially the lower hoses and clamps. Retighten or reseat clamps as needed. Look for any puddles or residue after your first ride.

Model-Specific Notes for the 2013 Beta 350 RS

  • The 350 RS uses a 1-liter cooling circuit. Always use a high-quality, premixed coolant compatible with aluminum engines and radiators for Beta motorcycles .
  • Some early 2013 Beta models may have a radiator bleeder screw. Make sure you bleed the air to prevent hot spots and ensure full coolant circulation .
  • Inspect hose clamps – Beta dirt bikes sometimes leave the lower hose clamps under-tightened from the factory. Secure all clamps snug to avoid leaks .
  • Always check coolant coverage over radiator fins – low level can result in overheated engine, coolant loss, and damage.
  • After your first ride or heat cycle, re-check the coolant level and inspect for new leaks around hose connections.

Best Practices

  • Change coolant every 1–3 years or more frequently if riding in harsh conditions .
  • Never use tap water to dilute coolant – use distilled water only for flushing.
  • Use only coolants safe for aluminum radiators and Beta engines.
  • Dispose of spent coolant safely – it is highly toxic.

Taking care of your Beta 350 RS cooling system keeps you riding longer with confidence. For all parts – radiators, hoses, clamps, and quality coolants – Shop parts for a 2013 Beta 350 RS Dirt Bike.

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Shop Radiator Hoses for a 2013 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.