How to Change the Coolant in a 2016 Husqvarna FE350S: Step-by-Step Guide

Shop parts for a 2016 Husqvarna FE350S Dirt Bike.

Keeping your 2016 Husqvarna FE350S’s cooling system fresh is essential for performance and longevity, especially for riders pushing their bikes on challenging terrain. This guide from MotoSport walks you through the coolant change process, highlights model-specific notes, and ensures you keep your 350S running cool all season long.

What You Need

  • Fresh, motorcycle-approved coolant
  • Drain pan
  • 10mm socket or wrench
  • Replacement crush washer or seal ring for drain bolt
  • Clean funnel
  • Rags or shop towels

Step 1: Preparation

  • Make sure the FE350S is completely cool before starting. Hot coolant can cause severe burns.
  • Stand the motorcycle upright on a level surface using a center stand or lift.

Step 2: Remove the Radiator Cap

  • Locate the radiator cap at the top of the left radiator. Slowly remove the cap to release pressure.
  • Do this before draining to avoid creating a vacuum in the system – this allows for complete drainage.

Step 3: Drain the Old Coolant

  • Place your drain pan under the right-side engine case, directly below the water pump cover.
  • Using a 10mm socket or wrench, remove the water pump cover drain bolt (often the lowest bolt on the cover).
  • Allow all coolant to drain from the engine and radiators. Opening the cap first will speed up the process – you may need to slightly tilt the bike side to side for a thorough drain.*

Step 4: Inspect & Reinstall the Drain Bolt

  • Inspect the crush washer or seal ring on the drain bolt. Replace if damaged or worn to prevent leaks.
  • Reinstall the bolt and torque it to the manufacturer’s specified value (about 10 Nm / 7.4 lbf ft for most Husqvarna FE models).

Step 5: Add Fresh Coolant

  • Using a clean funnel, slowly pour your new coolant into the radiator fill neck until it is level with the bottom of the cap seat.
  • Bleed air pockets by gently rocking the bike and squeezing radiator hoses. Continue adding coolant until the system is completely full.*

Step 6: Refit the Radiator Cap

  • Securely refit the radiator cap once you’re confident the coolant level is correct and all air is vented.

Step 7: Check for Leaks and Top Off

  • Start the engine and let it idle for several minutes. Watch for leaks and monitor the coolant level as the thermostat opens.
  • Once the engine is cool, check the coolant level again. Top off if needed.

Things FE350S Owners Should Know

  • The 2016 FE350S shares its engine platform with KTM models and utilizes a high-performance cooling system built for demanding enduro conditions.
  • Be sure to use a non-silicate, motorcycle-specific coolant to prevent internal corrosion and maximize radiator life.
  • Inspect radiator hoses and clamps regularly—the FE350S is subject to vibration and hard use, so catch any signs of wear early.
  • Factory fan kits are a popular upgrade for the FE350S if you ride lots of slow, technical terrain—these can prevent overheating in challenging conditions.
  • Coolant should be changed at least every two years, or sooner if the bike sees frequent heavy use.

Pro Tips for a Smoother Coolant Change

  • Capture and dispose of the old coolant responsibly—antifreeze is toxic to pets and wildlife.
  • If the removed coolant looks dirty or rusty, consider flushing with distilled water before refilling to maximize cooling system health.

That’s all you need to keep your 2016 Husqvarna FE350S running cool and protected. For genuine parts & maintenance accessories, trust MotoSport to keep you out front and worry-free on the trails.

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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.