How to Change the Coolant in a 2024 GAS GAS EX 350F
Regular coolant replacement is essential to maintain peak performance and prevent overheating in your 2024 GAS GAS EX 350F. This model shares its advanced engine and cooling system DNA with KTM and Husqvarna, but there are a few GAS GAS-specific details every owner should know. Done right, this service increases reliability and extends the life of your engine. Here is a step-by-step MotoSport guide to changing your coolant, tailored for the EX 350F.
What Makes the EX 350F Cooling System Unique?
- Lightweight, high-efficiency radiators with integrated radiator protection require careful cap removal to prevent damage.
- Factory coolant capacity is approximately 1.2 liters (1.3 quarts) and should be checked after short rides post-change for proper level.
- Engine components are packed tightly; be methodical when positioning the bike and draining coolant to avoid spills and splashes.
- If you have the Competition (EX) model, note the dirt-oriented engine mapping which benefits even more from proper cooling for sustained off-road performance.
Tools & Supplies Needed
- New coolant compatible with aluminum engines (refer to your manual for spec, but choose a high-quality motocross-approved premix or concentrate you trust)
- Drain pan
- 8 mm socket or wrench (for water pump cover screw)
- Flat-head screwdriver (for radiator cap)
- Torque wrench
- New seal washer for drain screw (recommended, not always required)
- Clean rags and safety gloves/eye protection
Step-by-Step Coolant Change Guide for 2024 GAS GAS EX 350F
- Ensure the engine is cold. Never open the cooling system when hot—there is a risk of burns from pressurized hot coolant.
- Stabilize the bike upright on a level surface using a stand.
- Place a drain pan below the water pump cover on the right engine side.
- Remove the radiator cap: Turn the cap counterclockwise to release pressure, then remove.
- Locate and remove the coolant drain screw: This is on the water pump cover (lower right side of the engine) marked as an M6 screw. Loosen and remove it, letting coolant flow into the drain pan. For best drainage, gently lean the bike side-to-side.
- Inspect drain screw washer; replace with a new seal ring if damaged or corroded to prevent leaks when reinstalled.
- Reinstall and tighten the drain screw: Torque to 10 Nm (7.4 lbf ft).
- Slowly pour new coolant into the radiator until the level is about 10 mm (0.39 in) above the radiator fins. Let any trapped air escape by gently shaking the bike or tapping radiator hoses.
- Reinstall the radiator cap.
- Wipe away stray coolant from engine surfaces. Use water if needed to dilute and clean any spillage.
- Start the bike briefly with the radiator cap on. Let the engine idle for 1-2 minutes, then shut off and wait for it to cool. Re-check coolant level and top off if necessary.
- Dispose of old coolant safely; it is toxic to pets, people, and the environment.
Pro Tips for EX 350F Owners
- Ride for a few minutes after your coolant change, then check the level again to ensure no air remains trapped in the system.
- Never mix coolant types; flush completely if switching brands or formulations.
- Visually inspect your radiator, hoses, and cap seal for signs of leaks or fatigue during coolant changes for maximum reliability.
- Routinely check manual torque values–GAS GAS motorcycles use metric fasteners that should not be over-tightened.
Changing your coolant is straightforward with the right parts and process. MotoSport stands behind every ride—use our parts finder to get OEM-fit coolant, seals, and accessories designed specifically for your 2024 GAS GAS EX 350F.
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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.