How to Change the Coolant in a 2008 Suzuki RM85L: Step-by-Step Guide
Shop parts for a 2008 Suzuki RM85L Dirt Bike.
Keeping the coolant fresh in your 2008 Suzuki RM85L is essential for performance and engine longevity, especially given this model's high-revving two-stroke design. Regular coolant changes prevent overheating, corrosion, and mineral buildup – a critical routine to help you get the most from every ride.
What Makes the 2008 RM85L Unique?
The RM85L features a longer swingarm and higher seat compared to the standard RM85, designed for taller youth riders demanding enhanced stability on the track. This model's compact engine relies on a liquid-cooling system that can be sensitive to old or contaminated coolant, so regular maintenance is crucial for consistent throttle response and top-end power output.
Tools and Materials Needed
- Fresh, pre-mixed motorcycle coolant (never regular tap water)
- Drain pan
- 8mm or 10mm socket wrench (check drain bolt size)
- Phillips or flathead screwdriver (for hose clamps if needed)
- Shop towels/rags
- Gloves and safety glasses
Step-By-Step Coolant Change Procedure
- Ensure the engine is completely cool. Never open the radiator cap when hot – risk of serious burns from pressurized steam or fluid.
- Stabilize the bike. Place your RM85L securely on a stand or block to keep it upright and level – avoiding spills and ensuring a full drain.
- Remove the radiator cap. Locate the radiator at the front of the bike, unscrew and remove the cap to release any residual pressure.
- Drain the old coolant. Set your drain pan beneath the radiator. Remove the drain plug on the lower side of the water pump housing (usually right side engine case) using your socket wrench. If necessary, disconnect the lower radiator hose to ensure thorough drainage.
- Inspect hoses and the drain plug. Check the condition of the rubber hoses and O-rings while the system is empty. Replace worn, cracked, or bulging parts for leak-free performance.
- Reinstall the drain plug and hoses. Once all coolant has drained, carefully reinstall the drain plug and reconnect the hose. Tighten securely, but avoid overtightening.
- Refill the system with fresh coolant. Slowly pour new, pre-mixed coolant into the radiator until it reaches the filler neck. The RM85L requires approximately 570 ml (1.2 US quarts).
- "Burp" the system to release air. With the radiator cap off, gently rock the bike side to side and let any trapped air escape. This helps prevent air pockets which can cause overheating.
- Run the engine briefly. Start the bike and idle for a few minutes, watching the coolant level in the radiator. Add more coolant if the level drops as air bubbles rise and escape.
- Reinstall the radiator cap. Once the coolant remains steady at the filler neck and no more bubbles appear, securely fit the radiator cap back on.
- Check coolant reservoir and system for leaks. If your RM85L is equipped with a coolant recovery tank, make sure it's filled to the proper line. Inspect around hose connections, the drain plug, and radiator cap to confirm there are no leaks.
Important Model-Specific Tips
- Use only motorcycle-specific, premixed coolant – the aluminum radiators of the RM85L are vulnerable to deposits from mineral-rich tap water.
- Double-check all hose connections and the radiator cap. The high-revving nature of the RM85L means pressure can reveal weak spots quickly if seals are compromised.
- Flush the system thoroughly if the old coolant appeared rusty, oily, or contaminated, repeating the drain-refill cycle using distilled water until it runs clear, then refill with fresh coolant.
When to Replace
- Suzuki recommends changing coolant every year for best protection and consistent cooling even on hard track use.
- Replace hoses or the radiator cap if you notice leaks or a loss in cooling performance.
Keep your 2008 Suzuki RM85L running cool and strong by making coolant changes part of your regular maintenance schedule. It's a simple task that pays back in performance, safety, and reliability – so you can focus on the ride, not the wrenching.
Related Shopping Categories
Shop Radiators for a 2008 Suzuki RM85L Dirt Bike.
Shop Coolant for a 2008 Suzuki RM85L Dirt Bike.
Shop Temperature Sensors for a 2008 Suzuki RM85L Dirt Bike.
Shop Tools for a 2008 Suzuki RM85L Dirt Bike.
Shop Radiator Hoses for a 2008 Suzuki RM85L 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.