How to Change the Coolant in a 2014 KTM 150XC
Shop parts for a 2014 KTM 150XC Dirt Bike.
Routine maintenance for your 2014 KTM 150XC includes periodically changing the coolant–an essential step to keep your engine performing at its peak and prevent overheating. The KTM 150XC uses a compact, high-revving two-stroke engine, making correct coolant maintenance especially important for sustained performance and durability. Follow this MotoSport-exclusive step-by-step guide for a smooth, mess-free coolant change engineered just for your KTM.
Tools & Supplies You'll Need
- 8mm socket or wrench
- Torque wrench (recommended)
- Catch basin or container suitable for coolant
- New ethylene glycol-based engine coolant (KTM recommends a non-silicate, phosphate-free formula)
- Distilled water (if flushing system)
- Funnel (for easy pouring)
- New crush washer for drain bolt (optional, but ideal)
- Protective gloves & shop rags
Step-by-Step Coolant Change Procedure
- Ensure the engine is completely cool before starting. Hot coolant can cause severe burns.
- Stand the KTM 150XC upright and remove the radiator cap to relieve pressure in the system.
- Place your catch basin directly under the coolant drain bolt at the water pump.
- Using your 8mm socket or wrench, remove the drain bolt carefully–coolant will begin to flow out.
- Allow all old coolant to drain from both the radiator and engine. If you want to do a full system flush, reinstall the drain bolt and pour distilled water into the radiator, then drain again.
- Reinstall the drain bolt. If possible, use a new crush washer for a tight seal. Tighten to approximately 8 Nm (check your manual for confirmation).
- Fill the radiator with fresh coolant up to the filler neck. The 2014 150XC's system capacity is approximately 1.1 liters, but check the owner's manual for precise volume.
- Bleed the cooling system:
- Some 150XC models include a cylinder head bleed screw. If present, open it three turns and tilt the bike slightly to the right.
- Slowly pour coolant into the radiator until fluid exits the bleed screw without bubbles, then tighten it.
- Top up the radiator until full and reinstall the radiator cap.
- Start the bike and let it warm up fully with the radiator cap on. Shut it off and allow the engine to cool completely again.
- Recheck the coolant level in both the radiator and the overflow/compensating tank–top up as necessary to reach the MAX mark.
MotoSport Maintenance Tips for the 2014 KTM 150XC
- These two-stroke models are particularly sensitive to overheating due to their high-revving design and smaller coolant system capacity. Always make sure the system is fully bled and there are no trapped air bubbles after a coolant change.
- Use only recommended coolant types. Non-silicate, phosphate-free coolants are mandatory to avoid corrosion inside the magnesium engine case components of KTM engines.
- Inspect hoses, radiator, and the water pump seal for leaks or wear. Replacing aging hoses or worn gaskets reduces the risk of overheating and subsequent engine damage.
- Over years of use, the radiator cap may lose pressure holding ability–replacing it as part of routine cooling system maintenance helps retain factory performance.
Changing your coolant regularly ensures optimal engine temperature, performance, and reliability – especially crucial on high-strung two-stroke bikes like the KTM 150XC. For all correct-fit, top-quality cooling system parts for your dirt bike, trust MotoSport.
Related Shopping Categories
Shop Radiators for a 2014 KTM 150XC Dirt Bike.
Shop Coolant for a 2014 KTM 150XC Dirt Bike.
Shop Temperature Sensors for a 2014 KTM 150XC Dirt Bike.
Shop Tools for a 2014 KTM 150XC Dirt Bike.
Shop Radiator Hoses for a 2014 KTM 150XC 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.