How to Change the Coolant in a 2023 Sherco 250SEF-R
Shop parts for a 2023 Sherco 250SEF-R Dirt Bike.
Routine coolant changes are essential for optimum engine performance and longevity in your 2023 Sherco 250SEF-R. This model’s high-performance engine requires a specific procedure to ensure efficient cooling and proper maintenance. Follow these proprietary MotoSport steps for a complete coolant service tailored to your Sherco 250SEF-R.
Tools & Supplies Needed
- New coolant (Minerva Perma Universal D 4 -25°C or equivalent high-quality moto coolant)
- Drain pan or container
- 8mm & 10mm sockets
- Torque wrench
- Funnel
- Clean shop towels
- Fresh sealing washer (if required for the drain plug)
Step-by-Step Coolant Change Procedure
- Allow the Bike to Cool
Never attempt to open the radiator cap or drain coolant while the engine is hot to avoid burns or pressurized spray. - Position the Bike
Keep the bike vertical on a stand and ensure it’s stable on a level surface. - Access the Coolant System
Locate the radiator cap on the left side of the radiator and the coolant drain screw, usually positioned at the water pump cover (identified as screw [A] in parts diagrams). - Drain the Coolant
Place a container beneath the drain screw.
Remove the radiator cap to release pressure, then remove the coolant drain screw completely.
Allow all coolant to drain out. Take care not to spill coolant and dispose of the old fluid responsibly at an approved collection facility.
Inspect the drain screw washer and replace it if required.
Tighten the drain screw to 6Nm once draining is complete . - Bleed the System (Important for SEF Models)
Remove the bleed screw (M6X8) found on the left side of the radiator.
This step ensures air pockets do not get trapped, promoting complete coolant circulation . - Refill with Fresh Coolant
Using a funnel, pour new coolant into the radiator through the filler neck until fluid begins to flow from the open bleed screw without bubbles.
Replace the bleed screw (always use a new gasket if required), torquing it to 8Nm.
Continue filling the system until the coolant level reaches the ‘LEVEL’ mark on the expansion tank. The 250SEF-R requires approximately 1.1 liters of coolant . - Secure All Caps & Screws
Ensure the radiator cap, bleed screw, and drain screw are all correctly torqued to spec. - Run & Recheck
Start the engine and let it run for several minutes to circulate coolant and release air.
Shut off the engine, allow it to cool, and recheck the coolant level, topping off as needed.
Special Considerations for the 2023 Sherco 250SEF-R
- Coolant Type: Always use Minerva Perma Universal D 4 -25°C (or a coolant with identical properties). Never use plain water or unapproved fluids, as these can cause rapid engine damage and void your warranty .
- Water Pump Maintenance: If you observe coolant leaking from the water pump weep hole, a seal replacement will be necessarya task requiring removal of the clutch housing and specialized tools. This service is outlined in your owner's manual and typically requires professional attention .
- Check for Leaks: After each coolant change, inspect thoroughly for leaks around the drain screw, bleed screw, radiator cap, and water pump area.
- System Capacity: 1.1 liters is the correct fill volume. Overfilling can cause overflow, underfilling risks overheating.
Why Change Coolant Regularly?
The 2023 Sherco 250SEF-R’s high-compression, liquid-cooled engine relies on quality coolant for temperature stability, corrosion prevention, and component life. Replace the coolant every 1-2 years or as recommended in your owner’s manual, especially after intense riding or extreme climate use.
For all your OEM and aftermarket cooling system partsincluding radiators, hoses, and coolantvisit MotoSport for the best selection, expertise, and support for your 2023 Sherco 250SEF-R.
Related Shopping Categories
Shop Radiators for a 2023 Sherco 250SEF-R Dirt Bike.
Shop Coolant for a 2023 Sherco 250SEF-R Dirt Bike.
Shop Temperature Sensors for a 2023 Sherco 250SEF-R Dirt Bike.
Shop Tools for a 2023 Sherco 250SEF-R Dirt Bike.
Shop Radiator Hoses for a 2023 Sherco 250SEF-R 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.