How to Change the Coolant in a 2017 Suzuki DRZ400SM

Looking to keep your 2017 Suzuki DRZ400SM running cool and performing at its best? Changing the coolant is key routine maintenance. If you need reliable parts before you start, Shop parts for a 2017 Suzuki DRZ400SM Dirt Bike.

The DRZ400SM has a compact radiator and single-cylinder engine that can run hot, especially in city riding or tight off-road trails. Regular coolant changes help maintain optimal engine temperature, prevent overheating, and extend engine life.

Tools & Supplies You Will Need

  • Phillips screwdriver
  • Medium socket set (notably 10mm and 12mm sizes)
  • Drain pan
  • 50/50 premixed motorcycle coolant (silicate- and phosphate-free is best)
  • Distilled water (optional, for flushing)
  • Shop rags
  • Gloves and eye protection

Step-by-Step Coolant Change Guide

  1. Ensure your DRZ400SM is completely cool. Never open the radiator cap on a hot engine—high-pressure steam and coolant can cause burns.
  2. Remove the left side plastic cover. Use a 12mm socket to access and remove the cover. This will expose your water pump and drain bolt for easy access.
  3. Position a drain pan under the water pump. The drain bolt is on the lower portion of the water pump cover.
  4. Open the radiator cap. Remove the small retaining screw first, then carefully unscrew the cap. This will help drain the system faster by allowing air in.
  5. Remove the coolant drain bolt on the water pump cover (10mm socket). Allow the old coolant to fully drain out. If you want a thorough flush, pour distilled water into the radiator, replace the cap, and briefly run the engine before draining again.
  6. Reinstall the drain bolt and torque it securely. Do not overtighten.
  7. Slowly fill the right radiator with your chosen premixed coolant. The 2017 DRZ400SM does not typically have a bleeder screw on the water neck, but see if yours has one—if yes, open it a few turns and close when you see steady coolant with no air bubbles*.
  8. Tilt the bike left and right as you fill, to help air escape. Continue topping off until the radiator is full.
  9. Reinstall the radiator cap and the retaining screw.
  10. Start the bike and let it idle until it reaches operating temperature (just a few minutes). Check for any leaks, and watch the coolant level in the overflow bottle—top off if necessary once the engine cools completely.
  11. Safely dispose of the old coolant at a proper facility. Do not pour it down drains, as it's hazardous to people & wildlife.

*If your water neck points straight up, you likely have no bleeder screw or thermostat. In this case, tilting the bike as you fill will help purge trapped air. Always confirm no air is left in the system before sealing up.

Things to Note for Your 2017 DRZ400SM

  • The DRZ400SM has an exposed engine and water pump, making this job straightforward compared to many sport bikes.
  • Always use a motorcycle-specific coolant; automotive coolants can damage the water pump seals and internal engine parts.
  • Premixed 50/50 coolant is the easiest and safest option, ensuring proper protection without dilution errors.
  • Inspect hoses, clamps, and radiator while you work. Replace any part that looks cracked or worn.
  • If you ride off-road or in urban traffic, check your coolant more often—heat build-up happens quickly at low speeds.

Following this guide will help keep your Suzuki DRZ400SM cool and reliable for years of city, highway, and off-road adventures.

Related Shopping Categories

Shop Radiators for a 2017 Suzuki DRZ400SM Dirt Bike.

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Shop Temperature Sensors for a 2017 Suzuki DRZ400SM Dirt Bike.

Shop Tools for a 2017 Suzuki DRZ400SM Dirt Bike.

Shop Radiator Hoses for a 2017 Suzuki DRZ400SM 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.