How to Change the Coolant in a 1987 Suzuki DS80
Shop parts for a 1987 Suzuki DS80 Dirt Bike.
Routine maintenance helps keep your 1987 Suzuki DS80 performing smoothly on every ride. Changing the coolant is essential for engine heat management, preventing overheating and corrosion. Even though the DS80 uses a simple air-cooled, two-stroke engine (meaning it does not require traditional radiator coolant), the information below applies to any circumstances where coolant may be in use, such as if the engine has been modified or for cleaning similar systems on liquid-cooled small bore Suzuki models. Read on for MotoSport's step-by-step proprietary guide – and important notes unique to your vintage Suzuki dirt bike.
What Makes the 1987 Suzuki DS80 Unique?
The 1987 Suzuki DS80 is a legendary youth dirt bike prized for its lightweight design and reliability. It features a dependable air-cooled, two-stroke engine with no OEM radiator system, so factory units do not require a coolant change for an engine radiator. If you're performing maintenance referencing 'coolant,' double check whether your model has aftermarket conversions or confusion with crankcase or transmission fluid changes. Always consult your service manual and inspect the bike to confirm its configuration.
Step-by-Step Guide: Flushing and Refilling Motorcycle Coolant (For Modified or Aftermarket Systems)
- Prepare Your Work Area
- Ensure the engine is completely cool.
- Position the bike on a stable, level surface.
- Gather tools: a wrench set, drain pan, fresh coolant, funnel, and clean rags.
- Locate and Remove the Radiator Cap
- Slowly open the cap to release pressure if equipped. Use caution to avoid splashes of hot coolant which can burn your skin.
- Drain the Old Coolant
- Find the radiator drain bolt or hose, usually at the lowest point of the cooling system. Place a drain pan beneath and loosen the bolt to allow all old coolant to empty completely.
- If your model lacks a formal drain bolt (typical for custom installs), gently detach the lowest hose to drain the system.
- Flush (Optional)
- For thorough cleaning, refill with distilled water, run the engine briefly, and then drain again. Repeat until water runs clear and free of debris or old coolant.
- Reinstall and Tighten Drain Bolt/Hoses
- Replace any washers or gaskets as needed, then securely fasten all fittings to prevent leaks.
- Add Fresh Coolant
- Using a funnel, pour in the correct premixed coolant for motorcycles. Fill to the base of the filler neck or up to the "Full" line on a reservoir, if present.
- Only use distilled water to mix with any coolant concentrate to avoid mineral contamination. Never use tap water for mixing.
- Burp the System
- Start the engine with the radiator cap off and let it idle. Carefully rock the bike and blip the throttle to release trapped air bubbles. Once the coolant cycles and the level drops, top off as needed.
- Reinstall Radiator Cap and Check for Leaks
- Secure the radiator cap. Let the bike cool, check the levels once more, and inspect all connections for leaks.
- Properly Dispose of Old Coolant
- Take the used coolant to a proper recycling or auto parts center. Never pour it down drains or onto the ground.
Essential Advice for DS80 Owners
- Factory-stock DS80 engines are air-cooled and do not need liquid coolant changes under most normal circumstances. These instructions serve DS80s with aftermarket cooling systems or can guide those working on other off-road motorcycles.
- Change all fluids – such as two-stroke pre-mix and transmission oil – according to your owner's manual. If unsure what fluids you need for your bike, MotoSport experts can help.
- Inspect rubber hoses and gaskets for aging or cracks, especially on vintage or modified setups.
- Use OEM specification fluids and parts for best performance and longevity.
Final Thoughts
While a stock 1987 Suzuki DS80 does not require coolant flushing, knowing how to service bikes with cooling systems keeps your ride reliable, whether you're restoring a DS80 with custom features or maintaining other liquid-cooled dirt bikes. Always verify your model's requirements, use the proper tools and fluids, and reach out to MotoSport whenever you need help keeping your Suzuki at peak performance.
Related Shopping Categories
Shop Radiators for a 1987 Suzuki DS80 Dirt Bike.
Shop Coolant for a 1987 Suzuki DS80 Dirt Bike.
Shop Temperature Sensors for a 1987 Suzuki DS80 Dirt Bike.
Shop Tools for a 1987 Suzuki DS80 Dirt Bike.
Shop Radiator Hoses for a 1987 Suzuki DS80 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.