How to Change the Coolant in a 2018 Suzuki RM85: MotoSport Exclusive Guide
Shop parts for a 2018 Suzuki RM85 Dirt Bike.
Keeping your 2018 Suzuki RM85 in top racing shape starts with proper and timely coolant changes. This exclusive MotoSport guide walks you through each step – tailored for your RM85 – along with tips only true dirt bike enthusiasts will appreciate. The RM85 features a compact, high-revving two-stroke engine that runs hot in competition, making diligent cooling system maintenance & essential for reliable track or trail performance.
What You Need
- Fresh coolant compatible with aluminum motorcycle radiators (like Suzuki 99000-99032-11X or equivalent)
- Drain pan
- Socket set (typically 8mm for water pump bolt)
- Phillips screwdriver for radiator shrouds (if needed)
- Distilled water (for flushing)
- Shop rags
- Protective gloves
Step-by-Step Coolant Change Instructions
- Let the engine cool completely before starting to avoid burns from hot coolant or steam.
- Remove the radiator cap slowly to release any pressure. Turn it counterclockwise gently.
- Locate and remove the coolant drain bolt on the water pump cover (typically on the lower right side of the engine). Place a drain pan underneath to catch old coolant. Remove the bolt and allow coolant to flow out. Squeezing radiator hoses can help force out trapped fluid.
- Flush with distilled water for best results. Replace the drain bolt temporarily, pour distilled water into the radiator, then remove the bolt again to drain. Repeat until the water runs clear. Never use tap water as it may contain minerals that can harm the cooling system.
- Inspect hoses and clamps for cracks, swelling, or leaks. The RM85’s cooling system is compact, so damage to hoses can quickly compromise engine performance.
- Reinstall and torque the drain bolt to the manufacturer’s specification, ensuring the washer is in good condition to prevent leaks.
- Fill the radiator with new coolant up to the brim. Slowly pour to prevent air pockets. Squeeze the hoses to help bleed out trapped air as you go.
- Replace the radiator cap firmly.
- Warm up the engine briefly (2–3 minutes), then shut off and allow to cool. Recheck the coolant level and top off as necessary.
- Inspect again for leaks at the radiator cap, hoses, and drain bolt after your first ride. Tighten if needed.
2018 Suzuki RM85 Owner’s Notes
- The RM85’s cooling capacity is small, so it is especially sensitive to low coolant levels or blockages—always check levels before every ride.
- Using fresh gaskets or O-rings on the drain bolt each service helps prevent small leaks that can go unnoticed but cause big problems over time.
- Aftermarket radiators or high-performance coolants can be a worthwhile upgrade for those racing or riding in hot climates.
Routine coolant changes keep your RM85 delivering crisp performance lap after lap–an essential move for riders who demand the best from their machine.
Related Shopping Categories
Shop Radiators for a 2018 Suzuki RM85 Dirt Bike.
Shop Coolant for a 2018 Suzuki RM85 Dirt Bike.
Shop Temperature Sensors for a 2018 Suzuki RM85 Dirt Bike.
Shop Tools for a 2018 Suzuki RM85 Dirt Bike.
Shop Radiator Hoses for a 2018 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.