How to Change the Coolant in a 2013 Suzuki RMZ250

Shop parts for a 2013 Suzuki RMZ250 Dirt Bike.

Keeping your 2013 Suzuki RMZ250 running cool is essential for peak motocross performance and engine longevity. Routine coolant changes protect your bike from overheating and corrosion. This step-by-step MotoSport guide will walk you through changing the coolant on this specific MMY (Make/Model/Year) dirt bike, while also highlighting important model-specific notes to keep you on track and out on the dirt.

Why Change the Coolant?

Engine coolant collects debris and loses its effectiveness over time. For the RMZ250, regular coolant flushes help dissipate heat better and prevent internal engine damage. It's a helpful habit between tough rides or after long storage periods.

What You'll Need

  • Fresh motorcycle-compatible coolant (avoid automotive coolants with silicates unless specified compatible)
  • Socket set including 8mm and 12mm sockets
  • Drain pan
  • New gasket washer for the drain bolt
  • Clean rags
  • Distilled or deionized water (optional, for flushing)

Step-by-Step Coolant Change Process

  1. Ensure engine is cool. Never open the radiator cap when the engine is hot to avoid burns from escaping steam or fluid.
  2. Remove the skid plate (if equipped) to access the water pump and drain bolt more easily.
  3. Remove radiator cap. This helps the coolant drain smoothly.
  4. Place drain pan under the bike. Locate the coolant drain bolttypically at the bottom of the water pump.
  5. Remove the drain bolt and old gasket washer. Allow all coolant to drain out completely. Observe the old coolant for discoloration or debris, which can indicate issues in the cooling system.
  6. Optional flush: Pour a small amount of distilled water into the radiator to flush out any remaining coolant. Allow it to drain completely. Do not use tap water, as minerals can cause corrosion.
  7. Install a new gasket washer onto the drain bolt and reinstall to 11 Nm (1.1 kgf-m, 8.0 lbf-ft) torque. A fresh washer ensures a leak-free seal for your RMZ250.
  8. Loosen the air bleeder bolt (if equipped, often found on the cylinder head or water pump). This helps vent trapped air during refilling.
  9. Pour fresh coolant into the radiator until the level reaches the bottom of the filler neck. The 2013 RMZ250 coolant capacity is 950 ml (1.0 US qt).
  10. Tighten the air bleeder bolt securely once coolant begins to seep from it, indicating the system is full and air-free.
  11. Securely install the radiator cap.
  12. Start the bike and let it idle for a few minutes, then shut it off and allow it to cool. Re-check the coolant level and top off as necessary. Inspect underneath for leaks.

2013 RMZ250 Model-Specific Pointers

  • The RMZ250's aluminum radiators and magnesium components are sensitive to corrosion. Always use coolant designed for aluminum engines.
  • Inspect coolant hoses for bulges or cracks while you have access–replace if needed for reliability.
  • Take care not to overtighten bolts into magnesium (soft metal parts) to prevent costly damage.
  • Take time to fully bleed air from the system–trapped air can cause overheating or fluctuating temperature readings, especially prevalent on motocross bikes like the RMZ250.

Disposal and Safety

Used coolant is toxic to people, pets, and the environment. Dispose of it in accordance with local regulations—never pour it down the drain or onto the ground. Wear gloves and avoid skin or eye contact.

If you need to replace worn parts during your coolant change, shop parts for a 2013 Suzuki RMZ250 Dirt Bike.

Related Shopping Categories

Shop Radiators for a 2013 Suzuki RMZ250 Dirt Bike.

Shop Coolant for a 2013 Suzuki RMZ250 Dirt Bike.

Shop Temperature Sensors for a 2013 Suzuki RMZ250 Dirt Bike.

Shop Tools for a 2013 Suzuki RMZ250 Dirt Bike.

Shop Radiator Hoses for a 2013 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.