How to Change the Coolant in a 2022 Sherco 125SE-R: A MotoSport Guide
Shop parts for a 2022 Sherco 125SE-R Dirt Bike.
Regularly changing the coolant in your 2022 Sherco 125SE-R is crucial for keeping your engine running at peak performance – especially given the high-revving demands placed on this two-stroke dirt bike. This step-by-step MotoSport guide will show you how to drain, refill, and bleed the cooling system safely, while highlighting some important notes unique to your Sherco 125SE-R.
What You Will Need
- Fresh, high-quality motorcycle coolant (Motul Motocool Factory Line -35°C recommended)
- Socket set (including 8mm and 10mm)
- Phillips screwdriver
- Drain pan
- Rag and water for cleanup
- New crush washer for the drain bolt (recommended)
- Torque wrench (for precise tightening)
Step 1: Preparation
- Ensure the bike is completely cool before starting to avoid burns from hot coolant and system pressure.
- Place the dirt bike on a stable stand or side stand. Locate the radiator, radiator cap (on the left side), and radiator drain bolt (lower right engine case).
Step 2: Drain the Old Coolant
- Remove the radiator cap to prevent vacuum lock and allow coolant to drain freely.
- Position a drain pan under the water pump area. Use an 8mm or 10mm socket to loosen and remove the coolant drain bolt.
- Allow all coolant to drain out. Tilt the bike gently if needed to ensure the system is empty.
- Inspect the drain bolt and replace the crush washer if worn. Reinstall and torque the bolt to 10 Nm.
Step 3: Refill the Cooling System
- Pour fresh coolant slowly into the radiator opening until the coolant reaches the rim (capacity approx. 1.1 liters).
- Some Sherco models are equipped with a radiator bleed screw—if yours does, crack it slightly to release air bubbles as you fill.
- Once full and with any air bled out, reinstall the radiator cap securely.
Step 4: Bleed the System
- Start the bike and let it idle for a few minutes to allow coolant to circulate. Watch for air bubbles rising in the radiator and top up if needed.
- Shut off the engine, let it cool, and recheck the coolant level. Add more if necessary, then reinstall the cap.
Special Notes for the 2022 Sherco 125SE-R
- This model’s two-stroke engine responds best to routine coolant checks, especially after heavy trail riding or race use.
- Ensure all gaskets and washers are in good condition to prevent leaks—Sherco recommends replacing the drain bolt washer at every coolant change.
- Only use coolant approved for aluminum engines. Avoid automotive coolant with silicates, which can damage internal passages over time.
- If you remove any plastics or the fuel tank for easier access during the process, carefully reinstall them to avoid pinching cooling hoses.
Disposal Tips
- Never pour old coolant down the drain or onto the ground. Collect and dispose of it at an approved recycling or waste facility.
Maintaining the cooling system in your Sherco 125SE-R ensures optimal temperature control under hard riding conditions and prolongs engine life. Stay on top of scheduled maintenance, and you’ll get the most out of every ride.
Related Shopping Categories
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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.