How to Change the Coolant in a 2017 Husqvarna 701 Supermoto

Shop parts for a 2017 Husqvarna 701 Supermoto Dirt Bike.

Routine maintenance keeps your Husqvarna 701 Supermoto running cool both on the street and the track. Coolant change is essential for engine health, especially on the 2017 model, which features a highly tuned single-cylinder engine known for efficient thermal management. Below is a proprietary step-by-step guide from MotoSport on how to properly change the coolant on your 701 Supermoto–with model-specific insights and practical tips.

What You Need

  • Fresh coolant: Use a motorcycle-approved, non-silicate, ethylene glycol-based liquid.
  • Drain pan
  • 10mm socket
  • Funnel
  • Shop rags/protective gloves and eyewear

Preparation and Safety

  • Let the bike cool to avoid burns from hot coolant or engine surfaces.
  • Work in a well-ventilated area and keep coolant away from pets–it's highly toxic.

Step-by-Step Instructions

  1. Remove the Seat and Side Cover
    Unclip and remove the seat then access the left side plastics for direct access to the radiator and overflow reservoir. This is easy on the 2017 701 Supermoto thanks to its modular bodywork design.
  2. Open the Radiator and Reservoir Caps
    Twist open the radiator cap (located at the top of the radiator under the left shroud) to relieve pressure. Also unscrew the coolant reservoir cap. Removing both caps allows for smooth draining by breaking the vacuum seal.
  3. Locate and Remove the Coolant Drain Bolt
    Place your drain pan under the water pump area (right side of the engine). Use a 10mm socket to loosen the coolant drain bolt. Some models also have a small copper washer–ensure it doesn't get lost, and plan to inspect or replace it on reassembly.
  4. Drain the Coolant
    Let the coolant fully drain into the pan. Tilting the bike slightly side-to-side helps evacuate trapped liquid from engine cavities.
  5. Flush (Optional but Recommended)
    Add distilled water to the radiator, replace the drain bolt temporarily, and start the bike for a minute to circulate. Shut off, drain again, and repeat until the water runs clear.
  6. Reinstall the Drain Bolt
    Refit the copper washer (replace if crushed or damaged) and torque the drain bolt securely, preventing any leaks.
  7. Refill with Fresh Coolant
    Use a funnel to pour new coolant into the radiator until it's full. Next, fill the overflow reservoir between the minimum and maximum marks. The 2017 Husqvarna 701 Supermoto holds approximately 1.2 liters–do not overfill.
  8. Start the Engine and Bleed the System
    With the caps off, start the engine and let it idle. Squeeze the radiator hoses gently to burp out trapped air. Once the thermostat opens and the coolant level drops, top off again in small amounts. Replace both caps when the bubbling stops.
  9. Check for Leaks and Finish Up
    Inspect the drain bolt and hose connections for leaks. Reinstall the side cover and seat securely. Take a short ride and recheck coolant levels once the engine cools.

Special Notes for the 2017 Husqvarna 701 Supermoto Owner

  • This lightweight, high-compression single likes fresh coolant for optimal performance and temperature management.
  • Bleeding air is crucial; air pockets can easily remain in the compact cooling passages. Always repeat the idle-and-top-up process if the level drops after the first ride.
  • If you ride aggressively or in hot climates, consider checking coolant strength before every season, as these engines run hotter than most dual-sports.
  • If coolant loss persists or the overflow bottle empties repeatedly, inspect the radiator and hoses for pinhole leaks or check for gasket failure (a rare but critical issue on high-mileage bikes).

Coolant Disposal

Never pour old coolant down the drain or onto the ground. Collect and dispose of it properly at a designated recycling or hazardous waste facility.

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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.