How to Change the Coolant in a 2026 Sherco 300 SEF FACTORY
Shop parts for a 2026 Sherco 300 SEF FACTORY Dirt Bike.
Maintaining your 2026 Sherco 300 SEF FACTORY is key to peak off-road performance, and regular coolant changes help keep the high-performance engine at optimal temperature ride after ride. Follow this step-by-step guide designed specifically for your Sherco 300 SEF FACTORY. These recommendations are unique to MotoSport.com and tailored to help you maintain your specific model.
What Makes the 2026 Sherco 300 SEF FACTORY Unique?
The Sherco 300 SEF FACTORY features a performance-driven liquid cooling system. Always use only the manufacturer-approved coolantnever substitute with just water or unapproved fluids, as doing so can cause severe engine damage and reduced longevity. This model's water pump and cooling system rely on the correct blend of antifreeze and water to protect against corrosion, cavitation, and overheating under extreme off-road conditions–4.
Tools & Supplies Needed
- Approved motorcycle coolant (do not use plain water or automotive coolant)
- Ratchet and sockets (8mm, 10mm suggested)
- Drain pan
- Clean funnel
- Shop towels
- Torque wrench
- Protective gloves & eye protection
Step-by-Step Coolant Change Guide
-
Allow the Engine to Cool Completely
Never open the radiator cap when hot. Wait until the engine is cold to the touch to avoid risk of burns. -
Remove the Skid Plate (if equipped)
For best access, remove the skid plate using the appropriate socket. -
Position the Bike Upright
Place your Sherco on a stand so the bike is level. -
Locate and Remove the Radiator Cap
The cap is usually on the left radiator. Open to relieve system pressure (only when the bike is cold). -
Locate and Remove the Coolant Drain Bolt
Find the coolant drain screw on the water pump cover (refer to your manual for exact location). Position your drain pan beneath, and remove the bolt to allow coolant to fully drain–2. -
Inspect the Drained Coolant
Look for debris or discoloration—these may indicate contamination. Proper disposal is critical for environmental safety. -
Reinstall the Drain Bolt
Clean the sealing surface, replace the bolt and snug to 6Nm using your torque wrench. Over-tightening can damage the cover.–2 -
Fill the System with Approved Coolant
Pour coolant in through the radiator neck using a funnel. Fill slowly until you reach the top. -
Bleed the Cooling System
To avoid air pockets, gently rock the bike side-to-side and tap the hoses. Check the coolant level and top off as needed. - Reinstall the Radiator Cap & Skid Plate
-
Warm Up the Engine and Re-Check
Start the bike, let it idle for a few minutes. Shut off, let it cool, and re-check the coolant level. Top off if needed.
Additional Tips & Warnings
- Never use plain water or unapproved fluids—only OEM-specified motorcycle coolant–4.
- If you notice leaks from the water pump weep hole, you may need to replace the water pump seal. Special tools and removal of the clutch cover are required for this repair—if in doubt, see a certified technician–2.
- Always observe correct torque on bolts: water pump housing screws (10Nm), coolant drain bolt (6Nm).
- Follow recommended service intervals for your Sherco to ensure reliability and performance under demanding conditions.
Stay Ready for Every Ride
Keeping your Sherco 300 SEF FACTORY's cooling system at its best means more fun and fewer surprises on the trail. Regular coolant changes, with attention to model-specific recommendations, help protect your ride's world-class engine for years of adventure.
Related Shopping Categories
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Shop Tools for a 2026 Sherco 300 SEF FACTORY 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.