How to Change the Coolant on a 2013 Suzuki RM85L: Expert Guide
Shop parts for a 2013 Suzuki RM85L Dirt Bike.The 2013 Suzuki RM85L is known for its lively 2-stroke engine, lightweight chassis, and years of reliable performance on the track. Proper cooling is critical to keep this competition bike running strong, so regular coolant changes are a must. Here's a step-by-step guide tailored to MotoSport.com customers, covering everything you need to know about changing the coolant on your RM85L, along with key model insights.
Essential Tools & Supplies
- Socket wrench set (metric, includes 8mm or 10mm for the drain bolt)
- Catcher pan for old coolant
- Funnel
- Distilled water (for flushing if needed)
- Pre-mixed motorcycle coolant or coolant concentrate (mixed with distilled water per label instructions) – do not use tap water
- Shop towels or rags
- Gloves & safety goggles
- New sealing washer for the drain bolt (recommended)
Model Notes: 2013 RM85L Cooling System
- The RM85L uses a lightweight aluminum radiator, so only run approved motorcycle coolant – not automotive or silicate-based blends.
- A 2-stroke runs hotter under heavy loads; maintaining proper coolant level and quality prevents overheating and engine damage.
Coolant Change & Flush Procedure
- Start with a Cool Engine
Only change coolant when the engine is fully cooled to avoid burns from hot fluid or steam. - Stabilize the Bike
Support your RM85L on a stand or level surface to prevent spills. - Remove Radiator Cap
Slowly open the radiator cap. If any pressure is released, tighten and let the engine cool longer. - Drain the Old Coolant
Place a catch pan below the water pump area. Locate the coolant drain bolt on the lower side of the water pump cover. Remove the bolt (and its sealing washer), letting coolant flow completely. Remove the reservoir cap if equipped and drain the overflow tank as well.
Tip: Inspect the old coolant. Signs of rust, oil, or debris may indicate the need for a full flush or further inspection. - Flush if Needed
If the coolant was dirty, thread the drain bolt back in, fill the system with distilled water, and run the bike briefly. Let it cool, then drain again to flush contaminants. - Install the Drain Bolt
Fit a new sealing washer if possible. Torque the bolt snugly, typically to 11 N·m (8 ft-lb). - Add New Coolant
Fill the radiator to the base of the filler neck using fresh, pre-mixed coolant formulated for aluminum engines. Fill the reservoir to the upper mark if your RM85L is equipped with one. - Burp the System
Start the engine with the radiator cap still off. Carefully blip the throttle, rock the bike side-to-side, and watch for air bubbles escaping. Top up coolant to the filler neck as the level drops. Once bubbling stops, shut off the bike and reinstall the radiator cap.
Warning: Never let the bike overheat with the radiator cap off. Only run the engine a few minutes to expel air. - Check for Leaks
Inspect for any drips around the drain bolt or hoses. Retorque if needed. - Top Off
Once the bike is cool, re-check and top off both radiator and overflow tank as necessary. Any persistent fluid loss could indicate an air pocket or a leak that needs to be addressed.
Additional RM85L Cooling Tips
- Inspect hoses and clamps for cracks or leaks with every coolant change.
- Replace coolant every 2 years or sooner with heavy use or frequent muddy/racey conditions.
- Only use coolants compatible with magnesium and aluminum engine parts.
Routine coolant servicing prevents overheating – a common problem in high-revving youth and mini motocross bikes like the RM85L. Always dispose of used coolant responsibly and keep your Suzuki performing at its best.
Related Shopping Categories
Shop Radiators for a 2013 Suzuki RM85L Dirt Bike.
Shop Coolant for a 2013 Suzuki RM85L Dirt Bike.
Shop Temperature Sensors for a 2013 Suzuki RM85L Dirt Bike.
Shop Tools for a 2013 Suzuki RM85L Dirt Bike.
Shop Radiator Hoses for a 2013 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.