How to Change the Coolant in a 2008 Suzuki RM85
Shop parts for a 2008 Suzuki RM85 Dirt Bike.Changing the coolant in your 2008 Suzuki RM85 is an essential maintenance task that ensures your engine stays cool under demanding off-road conditions. This guide walks you through the steps, notes model-specific details, and shares expert tips so your RM85 performs reliably every ride.
What To Know About the RM85 Cooling System
- The RM85 uses a compact liquid cooling system designed for high-performance two-stroke racing, with a radiator located on the left side of the frame.
- Total cooling system capacity is 570 ml (1.2 US qt).
- The radiator cap valve release pressure is factory set between 95 – 125 kPa (13.5 – 17.8 psi). Check this if experiencing coolant loss or overheating.
Tip: Always inspect your radiator hoses for cracks or swelling before refilling with coolant.
Step-by-Step Coolant Change Instructions
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Allow Engine to Cool Completely
Never open the radiator cap when the engine is hot—scalding fluid or steam can cause injury. Let the bike sit until cool to the touch . -
Stabilize the Bike
Place your RM85 securely on a block or stand so it's upright and won't tip over . -
Remove the Radiator Cap
Loosen and remove the radiator cap to relieve system pressure and allow draining. -
Drain Old Coolant
Locate the coolant drain plug at the bottom of the water pump; typically an 8 mm bolt. Place a suitable container under the drain, then remove the bolt to let coolant flow out.
For thorough draining, disconnect the lower radiator hose. (Dispose of old coolant responsibly.) -
Flush the System (Optional but Recommended)
Pour a small amount of distilled water into the radiator. Replace the drain plug, start the bike briefly, then shut off and drain again. Avoid tap water due to mineral deposits . -
Reconnect Hoses & Tighten Drain Plug
Inspect and reinstall the hose and bolt, confirming everything is tight to prevent leaks . -
Add New Coolant
Pour coolant into the radiator, filling to the bottom of the inlet hole (570 ml capacity). Use coolant approved for aluminum engines—avoid mixing types unless the system is flushed completely . -
Secure Radiator Cap
Tighten the cap firmly. Make sure the seal is in good condition; replace if damaged. -
Run Engine & Recheck Level
Start your RM85 and let it idle for several minutes. Shut down and inspect the coolant level, topping off if necessary. Also check for leaks.
RM85 Owner Tips
- Check radiator cap at every service interval. Loss of pressure can cause boiling and overheating.
- Inspect shrouds—on the RM85, they direct air to the radiator. Damage or blockage will compromise cooling.
- Always use a coolant compatible with magnesium and aluminum. The RM85's engine parts can corrode if wrong fluids are used.
- Consider upgrading hoses and clamps when replacing coolant for an extra margin of reliability, especially for riders participating in races or high-temperature conditions.
Regular coolant changes protect your RM85 from overheating, premature wear, and engine damage. Following these steps ensures proper cooling, peak performance, and peace of mind whether you're racing or riding trails.
Related Shopping Categories
Shop Radiators for a 2008 Suzuki RM85 Dirt Bike.
Shop Coolant for a 2008 Suzuki RM85 Dirt Bike.
Shop Temperature Sensors for a 2008 Suzuki RM85 Dirt Bike.
Shop Tools for a 2008 Suzuki RM85 Dirt Bike.
Shop Radiator Hoses for a 2008 Suzuki RM85 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.