How to Change the Coolant in a 2018 Suzuki DR-Z70

Shop parts for a 2018 Suzuki DR-Z70 Dirt Bike.

Regular coolant changes are crucial for keeping your 2018 Suzuki DR-Z70 running smoothly and preventing overheating or internal engine wear. While the DR-Z70 is famed for its reliability and simplicity, proper maintenance is essential to ensure young riders get the best performance – and longest lifespan – from their machine.

What Makes the DR-Z70 Coolant System Unique?

The Suzuki DR-Z70 is designed specifically for beginner and youth riders, with an air-cooled single-cylinder engine. Unlike liquid-cooled dirt bikes, the DR-Z70 relies on airflow and oil for engine cooling. This means: there is no conventional coolant or radiator system to flush on this MMY model.

If you're coming from liquid-cooled dirt bikes (such as the DR-Z400), you might expect to drain and refill coolant. However, on the DR-Z70, the key focus should be on regular oil changes and routine inspection of engine components to maintain temperature management and engine health. Coolant change procedures do not apply, as this bike does not use a liquid-cooling system.

Essential DR-Z70 Maintenance Tips

  • Engine Oil: Change engine oil every 6 months or as recommended in the owner's manual to ensure proper cooling and lubrication.
  • Air Filter: Clean and replace the air filter regularly, especially after rides in dusty or muddy conditions.
  • Spark Plug: Inspect every 6 months and replace annually to maintain reliable starting and smooth operation.
  • Drive Chain: Clean, lubricate, and adjust the drive chain as needed for consistent throttle response and minimal wear.
  • Valve Clearance – Tune-Ups: Inspect initially at 1 month, then every 6 months, checking the intake and exhaust valve clearances for optimal engine performance.

What to Do If You Suspect Overheating

If you notice signs of overheating (such as loss of power, unusual engine ticks, or oil that smells burnt), address them immediately:

  • Stop the engine and let it cool.
  • Check and top off engine oil if low.
  • Inspect for obstructions around the cylinder fins, as these are crucial for air-cooling.

Final Notes for DR-Z70 Owners

The DR-Z70's simplicity makes it a great entry-level bike for youth riders, requiring minimal maintenance compared to liquid-cooled models. There is no need for coolant flushes or radiator service, but routine inspections and oil changes are essential. Always consult your owner's manual for factory maintenance intervals, and trust MotoSport for OEM-quality parts and fluids for your 2018 DR-Z70.

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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.