How to Change the Coolant in a 2022 Kawasaki KLX300SM
Shop parts for a 2022 Kawasaki KLX300SM Dirt Bike.
Regular coolant changes are essential to keep the 2022 Kawasaki KLX300SM running cool and reliable, both on the road and off. This guide offers a robust, step-by-step coolant change procedure with notes specific to the KLX300SM—ensuring MotoSport riders always have the edge in performance and know-how.
What You Will Need
- 10 mm & 8 mm sockets and ratchet
- Phillips screwdriver
- Drain pan
- Funnel (optional but recommended)
- Distilled water (for flushing)
- New coolant (make sure it meets Kawasaki’s specifications)
- Clean rags
- Gloves & eye protection
Before You Begin
- Ensure the engine is completely cool before starting. Hot coolant can cause burns.
- Work in a well-ventilated area and have your new coolant on hand before draining the old fluid.
Step 1: Access Reservoir & Radiator Cap
- Remove the left rear fender to access the overflow reservoir. Use an 8 mm socket for the fender fasteners. The KLX300SM’s reservoir is tucked under this panel–take care when removing it to avoid cracking any plastic tabs.
- Next, remove the right front fender for better access to the radiator cap. This will make filling and bleeding the system easier.
Step 2: Drain Old Coolant
- Place a drain pan beneath the water pump area, just behind the right side engine cover.
- Loosen the radiator cap first. This will prevent a vacuum and help old coolant drain more thoroughly.
- Find the coolant drain bolt (near the water pump–check your owner’s manual for precise location). Slowly remove the bolt with a 10 mm socket and let the coolant fully drain. Be patient—wait until no more fluid trickles out.
- If you’re flushing, temporarily reinstall the drain bolt, fill the system with distilled water, then repeat the draining process.
Step 3: Refill and Bleed the System
- Reinstall and snug the drain bolt (do not overtighten).
- Using a funnel, slowly add new coolant to the radiator until full. Fill the reservoir to the full mark as shown on the tank.
- Leave the radiator cap off and start the engine. Let the bike idle for a few minutes—this allows trapped air to escape from the system. Gently rev the engine a few times. Top off the radiator as the level drops.
- Once stable, reinstall the radiator cap and check the overflow reservoir again. Add coolant if it dropped below the full line.
Step 4: Inspect and Test
- Run the engine up to operating temperature, then shut off and let cool. Double-check coolant levels and watch for leaks.
- If coolant level in the overflow tank is low after cooling, top off as needed.
Model-Specific Notes for the KLX300SM
- The 2022 KLX300SM shares cooling system components with off-road KLX models, but its liquid-cooled engine needs street-level vigilance for temperature regulation, especially during slow rides or traffic. Never skip coolant maintenance on this model.
- The coolant hose routing is exposed near the bottom of the chassis; check for hose wear or abrasion after each service, particularly if the bike has seen off-road use or dropped handlebars.
- Always use coolant with proper corrosion protection for aluminum engines. Premixed coolants for motorcycles are ideal. Never mix coolants of different types.
Final Tips
- Dispose of old coolant safely, as it’s toxic to people and animals.
- Check your coolant regularly—the KLX300SM's compact radiator makes it sensitive to even minor loss.
- Log your service. Consistent maintenance will extend both the life and value of your KLX300SM.
Related Shopping Categories
Shop Radiators for a 2022 Kawasaki KLX300SM Dirt Bike.
Shop Coolant for a 2022 Kawasaki KLX300SM Dirt Bike.
Shop Temperature Sensors for a 2022 Kawasaki KLX300SM Dirt Bike.
Shop Tools for a 2022 Kawasaki KLX300SM Dirt Bike.
Shop Radiator Hoses for a 2022 Kawasaki KLX300SM 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.