How to Change the Coolant in a 2016 KTM 350XCF-W: A MotoSport Exclusive Guide

Shop parts for a 2016 KTM 350XCF-W Dirt Bike.

Changing the coolant in your 2016 KTM 350XCF-W is critical for optimal engine performance and longevity, especially if you push your bike hard on the trail. This robust guide, created by MotoSport, walks you through every detail specific to your MMY (Make/Model/Year) so you can service your dirt bike confidently. The 350XCF-W's high-compression, high-revving four-stroke engine demands proper thermal management–fresh, correctly mixed coolant is key.

Before You Start: What You'll Need

  • Coolant compatible with aluminum engines, preferably KTM-approved or high-performance motorcycle coolant
  • Distilled water (never use tap water in your cooling system)
  • Basic hand tools: socket set, screwdrivers, pliers
  • Drain pan
  • Clean rags
  • Safety glasses and gloves

Step 1: Bike Preparation

  • Ensure the engine is completely cool. Hot coolant can cause severe burns.
  • Stand the motorcycle upright on a stable surface for best access and complete draining.

Step 2: Accessing the Cooling System

  • Remove the seat and any plastics or tank shrouds that obstruct access to the radiator cap.
  • Slowly remove the radiator cap to release pressure. If you feel resistance or hear hissing, wait until all pressure is released before removing completely.

Step 3: Draining Old Coolant

  • Place your drain pan under the water pump drain bolt (bottom right side of engine).
  • Remove the drain bolt. Allow coolant to fully drain from both radiators and the engine. Remove the lowest radiator hose if you want a more complete drain.
  • If available, open the small bleed screw at the top of the cylinder to release trapped air and ensure complete draining (consult your owner's manual for location).

Step 4: Flushing (Recommended but Optional)

  • Flush with distilled water: Replace the drain bolt, fill radiators with distilled water, run the engine briefly (1 minute, do not let it get hot), then drain again.
  • Repeat until water drains clear.

Step 5: Refilling with Fresh Coolant

  • Ensure drain bolt is reinstalled and tightened to manufacturer torque.
  • Pour in new coolant slowly. Tip: Elevate the front wheel (up to 19 inches if possible) so the radiator cap is the highest point–this helps purge air bubbles.
  • Fill until coolant is visible just below the fill neck, or per your owner's manual capacity.
  • If equipped, briefly open the cylinder bleed screw until coolant flows without air, then retighten.

Step 6: Bleeding Air from the System

  • Gently tilt and shake the bike side to side to free trapped air pockets.
  • Reinstall the radiator cap securely.

Step 7: System Check

  • Start the engine and allow it to reach full operating temperature with the bike upright.
  • Shut down and let cool, then recheck coolant level at the cap. Top off if needed.
  • Inspect for leaks near drain bolt, hoses, water pump, and radiator seams.

Special Considerations for the 2016 KTM 350XCF-W

  • The 350XCF-W uses a lightweight, liquid-cooled engine design. It is sensitive to coolant quality–always use coolant formulated for modern aluminum motors to prevent internal corrosion.
  • Always monitor the overflow reservoir between rides. If levels change dramatically, check for leaks or head gasket issues.
  • This model may require more frequent coolant changes if ridden aggressively or in extreme temperature swings–off-road conditions can cause rapid degradation of coolant.
  • Pay attention to common trouble spots such as the radiator cap seal and the water pump weep hole for early signs of leaks.

Disposal

  • Never pour used coolant down the drain or on the ground–take it to a certified recycling or hazardous waste center.

A fresh coolant flush is vital for keeping your KTM 350XCF-W performing at its peak year after year. For all the OEM and performance parts you need, MotoSport has you covered–make every maintenance job easier and keep your ride race-ready.

Related Shopping Categories

Shop Radiators for a 2016 KTM 350XCF-W Dirt Bike.

Shop Coolant for a 2016 KTM 350XCF-W Dirt Bike.

Shop Temperature Sensors for a 2016 KTM 350XCF-W Dirt Bike.

Shop Tools for a 2016 KTM 350XCF-W Dirt Bike.

Shop Radiator Hoses for a 2016 KTM 350XCF-W 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.