How to Change the Coolant in a 2017 Husqvarna FC350: MotoSport DIY Guide

Shop parts for a 2017 Husqvarna FC350 Dirt Bike.

Maintaining the cooling system on your 2017 Husqvarna FC350 is a must for peak performance, whether you're carving single-track or chasing lap times. Timely coolant changes ensure your bike runs cool, protecting the high-revving DOHC engine from overheating and premature wear. Here's a MotoSport-exclusive step-by-step guide designed for FC350 owners.

Essential Tools – What You'll Need

  • Basic hand tools (socket set with 8mm and 10mm, Phillips screwdriver)
  • Drain pan
  • Funnel
  • Replacement coolant (silicate-free, compatible with aluminum radiators)
  • Shop rags
  • Distilled water (if flushing system)
  • New seal ring for the drain bolt (recommended)

Step 1: Prep – Bike Position and Coolant Safety

  • Ensure the engine is completely cool before beginning. Never remove the radiator cap when hot to prevent burns.
  • Stand the motorcycle upright on a flat, horizontal surface for an accurate drain and refill.
  • Place your drain pan under the right side of the engine, beneath the water pump cover.

Step 2: Remove Radiator Cap

  • Slowly unscrew the radiator cap located on the right radiator. Release any residual pressure gently.

Step 3: Drain Old Coolant

  • Locate the coolant drain bolt on the water pump cover (right lower side of the engine).
  • Use a socket to loosen and remove the drain bolt (M6, torque spec: 10 Nm or 7.4 lbf ft for reinstallation).
  • Allow coolant to fully drain from both radiators. Tipping the bike gently side-to-side can help drain remaining fluid.
  • If performing a flush, reinstall drain bolt, fill the system with distilled water, run the engine briefly, and repeat the draining process.

Step 4: Inspect and Refit Drain Bolt

  • Inspect and clean the drain bolt. Install a new seal ring for best leak prevention.
  • Hand-tighten, then torque the bolt to spec (10 Nm / 7.4 lbf ft) to avoid overtightening and case damage.

Step 5: Refill Radiator

  • Using a funnel, slowly fill the radiator with your chosen coolant until it reaches the base of the filler neck. Use only coolant recommended for aluminum radiators – silicate-free and premixed, or mixed with distilled water as directed.
  • Bounce the bike gently and squeeze radiator hoses to help purge any air pockets.
  • Replace the radiator cap.

Step 6: Bleed & Top Off

  • Start the engine and let it idle for several minutes. Watch for the coolant level to drop as trapped air escapes.
  • Turn off the bike, allow to cool, and re-check coolant level; top off as necessary.

Final Checks – Husqvarna FC350 Owner's Tips

  • The 2017 FC350 uses a compact, high-revving motor that can be sensitive to coolant degradation, especially if raced hard or operated in hot climates. Always check for leaks after your first ride post-service.
  • Inspect the radiator fins for debris or mud and clean gently to ensure optimal heat dissipation.
  • If your FC350 is equipped with an aftermarket overflow tank or fan kit, inspect these for functionality during the coolant change process.
  • Never use regular tap water – always use distilled water with your concentrate or premixed products to prevent mineral deposits and corrosion within the system.

A regular coolant maintenance routine will help your 2017 Husqvarna FC350 run efficiently and reliably. For OEM and high-performance cooling system upgrades, Shop parts for a 2017 Husqvarna FC350 Dirt Bike.

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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.