How to Change the Coolant in a 2023 GAS GAS EX 350F
Routine coolant changes on your 2023 GAS GAS EX 350F ensure reliable performance and off-road durability. This bike uses a liquid cooling system designed for demanding trails, so maintaining optimal coolant quality and level is vital for engine health. Below, you’ll find a step-by-step MotoSport guide uniquely tailored for your EX 350F—including critical tips, safety notes, and model-specific recommendations.
Preparation
- Make sure the engine is completely cold before starting–opening the radiator cap on a warm bike can cause burns from pressurized hot coolant.
- Stand the motorcycle upright and secure it safely on a stand.
- Gather supplies: fresh coolant specified for aluminum engines, a drain pan, basic metric tools (especially an M6 socket), and safety gear (gloves, safety glasses).
Step 1: Drain the Old Coolant
- Locate the water pump cover on the right side of the engine.
- Place your drain pan beneath the lowest bolt on the water pump cover.
- Remove this bolt to begin draining the old coolant. Allow it to fully empty–gently rocking the bike can speed up the process.
- Remove the radiator cap to allow air in and ensure complete drainage.
Step 2: Inspect and Reinstall the Drain Bolt
- Inspect the drain bolt’s seal ring–if damaged or worn, replace it to prevent leaks.
- Reinstall the drain bolt and tighten it to the recommended torque spec: 10 Nm (7.4 lbf ft).
Step 3: Refill the System with New Coolant
- Confirm the bike is still level.
- Pour new coolant into the radiator until it is about 10 mm above the radiator fins (use a funnel for accuracy and to prevent spills).
- On the EX 350F, you may have a small bleeder screw atop the cylinder head. Crack it open briefly while filling to let trapped air escape, then tighten it once only coolant seeps out.
Step 4: Bleed the Cooling System
- To further eliminate air pockets, lightly tap the radiator hoses during filling.
- Once filled, reinstall the radiator cap securely.
Step 5: Check the Level and Inspect for Leaks
- Start the engine and let it idle for a few minutes. Shut off and let it cool completely.
- Re-check the coolant level–top off as necessary, as trapped air may purge and slightly lower the level after initial warm-up.
- Inspect for any leaks around the drain bolt and radiator.
Model Notes for 2023 GAS GAS EX 350F Owners
- The EX 350F’s radiator and cooling system are nearly identical to its KTM and Husqvarna counterparts but tuned for a smoother trail ride–use only compatible coolants rated for aluminum engine components.
- Capacity is approximately 1.2 liters (1.3 qt.) but confirm with your owner’s manual.
- Always dispose of old coolant responsibly, as it is toxic to animals and the environment.
- If riding in extreme temperatures, or racing, consider high-performance or race-specific coolants for superior thermal protection.
Final Inspection
- Reinstall all panels and guards that may have been removed.
- Take a short test ride and monitor temperature and coolant level afterward.
Staying ahead on maintenance with regular coolant changes is one of the most effective ways to maximize the life and reliability of your 2023 GAS GAS EX 350F—keeping you and your bike ready for every adventure.
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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.