How to Change the Coolant in a 2019 Sherco 300 SE FACTORY

Shop parts for a 2019 Sherco 300 SE FACTORY Dirt Bike.

Maintaining your 2019 Sherco 300 SE FACTORY's cooling system is critical for performance and durability. Replacing the coolant not only protects your engine from overheating and corrosion but also ensures your factory enduro keeps performing in the harshest conditions. Here's how to do it, with key points specific to your Sherco.

What You Need

  • Container for old coolant (always dispose of coolant at an approved collection center)
  • Fresh coolant (use only Sherco-approved types such as Minerva Perma Universal D 4 -25°C, not water or non-approved fluids)
  • Socket and wrench set
  • New gasket for the radiator bleed screw (M6x8)
  • Shop towels
  • Torque wrench (recommended)

Special Notes for the 2019 Sherco 300 SE FACTORY

  • The 300 SE FACTORY model runs a high-performance cooling system with a radiator bleed screw for trapped air removal. Proper bleeding is essential–do not skip this step.
  • On this model, never use plain water or fluids not specifically approved. The cooling system is engineered for specific additives that protect magnesium and aluminum engine parts from internal corrosion.
  • Regular checks for leaks and water pump seal integrity are especially important on high-strung enduro machines like the SE FACTORY.

Step-by-Step Coolant Change Guide

  1. Preparation
    • Make sure the motorcycle is on a level surface and completely cooled down.
    • Place a drain pan under the bike. Remove the skid plate (if equipped) for easier access to the drain bolt.
  2. Draining the Old Coolant
    • Locate the coolant drain screw at the bottom of the water pump. Loosen and remove this screw to drain the old coolant.
    • Unscrew the radiator cap to allow air in, which helps the coolant drain completely.
    • If equipped, drain the overflow tank as well. Remove and rinse the overflow tank if it is dirty or contaminated.
  3. Inspect Components
    • Check hoses for cracks or brittleness and squeeze to test for pliability.
    • Inspect the area around the water pump and weep hole for evidence of leaks, which may indicate a failing seal and require further attention.
  4. Refilling and Bleeding Air
    • Reinstall the drain plug carefully. Torque to manufacturer specification (typically 6Nm).
    • Remove the radiator bleed screw on the left side of the radiator (M6x8; torque to 8Nm when reinstalling).
    • Slowly add coolant through the radiator filler cap until it flows from the bleed hole free of air bubbles. Once there are no more bubbles, reinstall the bleed screw with a new gasket.
    • Continue filling coolant until the radiator is full (capacity is about 1.1 liters for the 300 SE FACTORY).
    • Replace the radiator cap. Make sure all screws and caps are secure, and wipe up any spilled coolant.
  5. Final Steps
    • Start the bike and let it idle with the radiator cap on, watching for leaks and proper coolant circulation. Let the engine cool, then re-check the coolant level and top off if necessary.
    • Check again after your first ride to ensure system is fully bled and sealed. Keep an eye on the coolant level and the radiator cap for the first few uses.

Important Reminders

  • Follow Sherco recommendations for coolant specifications to avoid internal engine damage.
  • Regularly inspect water pump seals—if you notice coolant leaking from the weep hole, the seal may require replacement (a task involving clutch cover removal and special tools).
  • Always allow the engine to cool before servicing the cooling system to prevent burns or injury.

Routine coolant replacement is a must for the peak performance and longevity of your 2019 Sherco 300 SE FACTORY. With these instructions, you can confidently service your cooling system and keep your ride at its best.

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Shop Radiator Hoses for a 2019 Sherco 300 SE FACTORY 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.