How to Change the Coolant in a 2014 Suzuki RMZ250: MotoSport Guide

Shop parts for a 2014 Suzuki RMZ250 Dirt Bike.

The 2014 Suzuki RMZ250 is a high-performance race-ready dirt bike, equipped with an aluminum radiator and precision cooling system. Regular coolant replacement ensures proper engine temperature regulation, peak power delivery, and long-term durability. Follow this MotoSport-exclusive step-by-step guide for a complete coolant change — plus key owner tips specific to your RMZ250.

What You'll Need

  • Compatible aluminum-safe engine coolant (Suzuki COOLANT or equivalent, 50:50 mix with distilled water)
  • Distilled water (for flushing)
  • Drain pan/container for old coolant
  • Socket wrench set
  • New gasket washer for the drain bolt
  • Protective gloves and eyewear

Step-by-Step Instructions

  1. Ensure the engine is completely cool.
    Never open the radiator cap when hot – escaping steam and hot coolant can cause serious burns.
  2. Open the radiator cap.
    This helps air flow during draining and speeds up the process. Twist slowly to relieve any lingering pressure.
  3. Locate & remove the engine coolant drain bolt (typically at the bottom of the water pump side of the engine).
    Use a drain pan to catch the old coolant for environmentally safe disposal. Clean around the area first to prevent debris from entering the system.
  4. Carefully flush the system.
    Pour distilled water into the radiator and let it drain through to remove residual coolant. Repeat until water runs clear. Only use distilled or deionized water – tap water can cause mineral buildup and corrosion in aluminum.
  5. Replace the drain bolt gasket washer.
    Always install a brand new washer to prevent leaks. Tighten the drain bolt to 11 N·m (8.0 lbf–ft).
  6. Loosen the air bleeder bolt.
    This is usually near the top of the cylinder head or radiator. It allows trapped air to escape while filling.
  7. Fill with new coolant.
    Pour your premixed, aluminum-safe coolant slowly into the radiator until it reaches the bottom of the filler neck. For the 2014 RMZ250, the coolant capacity is 950 ml.
  8. Tighten the air bleeder bolt.
    Once coolant begins to flow freely with no air bubbles, tighten the bolt to seal.
  9. Secure the radiator cap.
    You should hear several clicks – the cap must be fully locked for pressure integrity.
  10. Start & idle the bike for several minutes.
    Allow coolant to circulate. Watch for leaks around the drain bolt, bleeder, and hoses.
  11. Check coolant level again.
    After cooling down, recheck. Add more coolant if needed, as trapped air may escape after initial cycling.

Special Considerations for Your 2014 Suzuki RMZ250

  • Aluminum Cooling System: Only use coolant specifically formulated for aluminum radiators and engines. Standard automotive coolants can cause corrosion and clog passageways.
  • Gasket Washer Replacement: Old washers can fail; this model requires a fresh gasket washer at each change.
  • Flush Carefully: Pressurized air can help remove residual coolant if switching to a new type, but always avoid water-based flushing when swapping to non-water-based coolants.
  • Environmental Safety: Never dump used coolant. Dispose at approved recycling centers.

Pro Tips

  • Inspect hoses, clamps, and radiator for damage while you work. Replace questionable parts to avoid failure mid-ride.
  • If you ride in extreme temperatures or race environments, consider more frequent coolant changes.
  • Record the service date & type of coolant used for tracking maintenance.

Proper coolant maintenance keeps your RMZ250 running cooler, faster, and longer. For the full lineup of OEM and high-performance parts – Shop parts for a 2014 Suzuki RMZ250 Dirt Bike.

Related Shopping Categories

Shop Radiators for a 2014 Suzuki RMZ250 Dirt Bike.

Shop Coolant for a 2014 Suzuki RMZ250 Dirt Bike.

Shop Temperature Sensors for a 2014 Suzuki RMZ250 Dirt Bike.

Shop Tools for a 2014 Suzuki RMZ250 Dirt Bike.

Shop Radiator Hoses for a 2014 Suzuki RMZ250 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.