How to Change the Coolant in a 2010 Suzuki RM85: A MotoSport Guide
Shop parts for a 2010 Suzuki RM85 Dirt Bike.
Changing the coolant in your 2010 Suzuki RM85 is a vital maintenance task to ensure lasting performance and prevent overheating. This mini motocrosser, favored for its agile handling and high-revving 2-stroke engine, operates best with a properly maintained cooling system. Here is a proprietary MotoSport guide for changing the coolant, along with model-specific notes for your RM85.
What You'll Need
- Fresh coolant (recommend motorcycle-specific, aluminum-safe formula)
- Distilled water
- Drain pan
- 8mm socket or wrench
- Rags or shop towels
- Protective gloves
Steps to Change the Coolant
- Ensure the engine is cool. Never attempt to open the radiator on a hot engine.
- Remove the seat and side panels as needed for easier access to the cooling system (optional but recommended for thorough cleaning and inspection).
- Locate the radiator cap at the top of the left-side radiator. Remove the cap slowly to release any residual pressure.
- Position a drain pan beneath the water pump. The RM85 water pump drain bolt is typically located at the bottom right of the engine case, near the water pump cover.
- Remove the drain bolt using an 8mm wrench or socket. Allow all old coolant to drain completely into the pan.
Tip: Remove the radiator cap before pulling the drain bolt to let air in, which will help the system drain faster. - Inspect the drained coolant. Any sign of oil or metal shavings can indicate engine issues requiring further inspection.
- Flush the system (optional but recommended):
Pour distilled water into the radiator until it flows out clear from the drain. This step helps remove residues and mineral deposits. Avoid tap water to prevent mineral buildup. - Reinstall the drain bolt and torque it gentlydo not overtighten, as the water pump cover is aluminum and can strip easily.
- Add fresh coolant up to just below the radiator filler neck. Slowly pour to prevent air pockets.
The RM85's small radiators mean even slight air locks can cause overheating; fill steadily and tap hoses gently to release trapped air. - Reinstall the radiator cap securely.
- Run the engine for 1–2 minutes with the cap on. Let it cool, then recheck the coolant level and top off if needed.
- Reinstall the seat and plastics if removed.
Important RM85-Specific Tips
- Avoid mixing coolant types. Switch only when flushing the system thoroughly.
- Watch for leaks at the water pump and radiator hoses. This model is sensitive to gasket wear, so inspect gaskets when changing coolant.
- Frequent coolant checks are a must; the RM85's high-revving two-stroke runs hotter than many other small-bore bikes.
- Dispose of used coolant responsibly. Most auto parts stores will recycle old coolant for you.
Maintenance Reminders
- Change coolant at least once a year or every 25 hours of riding, whichever comes first, especially if you ride in extreme conditions.
- Using quality parts when replacing hoses, caps, or gaskets can help prevent costly overheating damage to your RM85's top end.
Related Shopping Categories
Shop Radiators for a 2010 Suzuki RM85 Dirt Bike.
Shop Coolant for a 2010 Suzuki RM85 Dirt Bike.
Shop Temperature Sensors for a 2010 Suzuki RM85 Dirt Bike.
Shop Tools for a 2010 Suzuki RM85 Dirt Bike.
Shop Radiator Hoses for a 2010 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.