How to Change the Coolant in a 2006 Suzuki RM85 Dirt Bike
Shop parts for a 2006 Suzuki RM85 Dirt Bike.
Performing a coolant change on your 2006 Suzuki RM85 is crucial for keeping your bike running cool, especially during hard riding or racing. The RM85's high-revving two-stroke engine relies on an efficient cooling system, so regular maintenance helps ensure peak performance and prevents costly overheating issues. Below is a MotoSport-exclusive guide for tackling this service.
What to Know About the 2006 RM85 Cooling System
- Engine coolant capacity: 570 ml (about 1.2 US pints)
- Never open the radiator cap when hot–allow engine to fully cool
- Use a high-quality ethylene glycol-based coolant formulated for aluminum engines, unless you are running a specialty coolant for competition
- Flush more frequently if riding in muddy or sandy conditions
Tools & Supplies
- 8 mm wrench or socket
- Flathead screwdriver or pliers (to remove hose clamps if needed)
- Drain pan
- Funnel
- Distilled or deionized water (for flushing)
- Fresh coolant compatible with aluminum radiators
- Shop rags and gloves
Step-by-Step Coolant Replacement
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Let the bike cool completely
Never open the radiator cap when the RM85 is hot; pressurized steam and scalding coolant will escape and can cause burns. -
Stabilize and prep
Place the bike upright on a block or stand to keep it level. -
Remove the radiator cap
Carefully unscrew the radiator cap to relieve any residual pressure and allow for smooth draining – do this only when cool. -
Locate and remove the drain bolt
Put your drain pan below the water pump. On the RM85, the drain bolt is found at the bottom of the water pump case. Remove it with an 8 mm wrench and let the old coolant drain completely.
For a more thorough drain, slightly loosen (or disconnect) the lower radiator hose at the water pump to release any trapped coolant – as needed for complete drainage. -
Flush the system (recommended)
Replace the drain bolt and pour distilled water into the radiator using a funnel. Replace the cap, carefully start the engine, and let it idle for a minute. Shut off, allow to cool, then repeat the drain process to remove any contaminants. -
Replace the drain bolt and reconnect hoses
Tighten the drain plug and reconnect any hoses removed. Do not overtighten. -
Refill with new coolant
Using your funnel, pour fresh coolant into the radiator until it nearly reaches the filler neck. The 2006 RM85 requires 570 ml of coolant. -
Re-seat the radiator cap
Install the cap securely. -
Bleed air from the system and inspect
Start the bike, let it warm up, then shut off and check the coolant level again. Top off if necessary. -
Dispose of old coolant properly
Take used coolant to a local recycling center or hazardous waste facility.
Additional RM85-Specific Notes
- Regularly check your radiator cap seal and pressure rating; the RM85 should release between 95–125 kPa (13.5–17.8 psi) pressure.
- Always check for cooling system leaks after changing coolant–inspect hoses, clamps, the radiator itself, and the water pump cover.
- Consider upgrading to silicone hoses for extra durability, especially if you ride or race in hot climates.
Related Shopping Categories
Shop Radiators for a 2006 Suzuki RM85 Dirt Bike.
Shop Coolant for a 2006 Suzuki RM85 Dirt Bike.
Shop Temperature Sensors for a 2006 Suzuki RM85 Dirt Bike.
Shop Tools for a 2006 Suzuki RM85 Dirt Bike.
Shop Radiator Hoses for a 2006 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.