How to Change the Coolant in a 2020 KTM 350SXF: A MotoSport Guide
Shop parts for a 2020 KTM 350SXF Dirt Bike.
Maintaining your 2020 KTM 350SXF is key to reliable performance on the track or trail. One of the most essential maintenance tasks is changing the coolant. This guide offers a proprietary, step-by-step process tailored to your KTM 350SXF, ensuring you get the most from your machine.
Why Routine Coolant Changes Matter
The 350SXF's high-revving engine runs hot. Old coolant loses its ability to dissipate heat and prevent corrosion inside the radiators and engine. Fresh coolant ensures your bike stays cool, helps avoid overheating, and prolongs the life of vital components.
What You'll Need
- Fresh coolant (choose a high-quality powersports-specific coolant for aluminum engines, such as Engine Ice or Maxima)
- 8mm socket or wrench
- Drain pan or large container
- Funnel
- Clean rags or paper towels
- Distilled water (optional, for flushing)
Step-by-Step Coolant Replacement Process
- Let the Bike Cool
Never open the radiator cap when hot – the cooling system is under pressure and hot coolant can spray out. Allow the engine to reach ambient temperature. - Remove the Radiator Cap
Locate and unscrew the radiator cap gently to release any residual pressure. - Locate the Water Pump Drain Bolt
On your 2020 350SXF, find the coolant drain bolt on the water pump cover on the right side of the engine. Place your drain pan beneath. - Drain the Old Coolant
Using your 8mm socket, carefully remove the drain bolt and allow all coolant to flow out completely. Some models have a small copper crush washer – do not lose it. - Optional: Flush the System
If coolant is notably dirty or contaminated, pour distilled water into the radiator and kick the bike over a few times (do not start the engine) to circulate, then drain again. Repeat if needed. - Reinstall the Drain Bolt
Tighten the bolt to factory specifications. Double-check for leaks or washer damage. - Refill with New Coolant
Use a funnel to pour fresh coolant into the radiator until full.
For best results and complete system fill, slightly elevate the front wheel and gently "burp" the system by gently squeezing the radiator hoses. - Bleed the Cooling System
The 350SXF can trap air. After filling, start the bike and let it idle for a minute. With the engine off and cooled, top off again if needed. - Check and Top Off
After the first ride, re-check coolant level and top off again to ensure no air remains.
Model-Specific Insights: KTM 350SXF Cooling System
- The 2020 350SXF features a high-flow water pump and twin radiators for superior cooling – keep both radiators level during fills for a complete fill.
- The bike's compact frame means radiator hoses are short; check all hose clamps after coolant changes to prevent leaks.
- This model has no separate coolant bleed screw; careful refilling and "burping" (gently squeezing the hoses) are crucial for removing trapped air.
- If you run hard or frequently ride tight tracks, consider upgrading to race-spec coolant for enhanced heat resistance.
Coolant Change Schedule
For maximum engine life, change the coolant at least once a year or more often if riding in muddy, sandy, or high-heat conditions.
Disposal
Old coolant is toxic – always dispose of it at a proper hazardous waste facility.
Stay ahead with routine coolant changes – your KTM 350SXF's performance and reliability depend on it.
Related Shopping Categories
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Shop Radiator Hoses for a 2020 KTM 350SXF 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.