How to Change the Coolant in a 2018 Suzuki DR650SE
Shop parts for a 2018 Suzuki DR650SE Dirt Bike.
Keeping your 2018 Suzuki DR650SE running cool and reliable takes regular maintenance, and changing the coolant is one of the most important steps. Swapping old coolant for fresh ensures your bike won&t overheat, prevents internal corrosion, and helps maintain peak performance–especially on a versatile dual-sport like the DR650SE, known for both street and off-road reliability. Here&s how to change your coolant the MotoSport way, plus a few tips specific to your DR650SE.
What You&ll Need
- Fresh coolant–use a motorcycle-approved, silicate-free coolant
- Distilled water (if flushing the system)
- Drain pan (minimum 2 liters capacity)
- 8mm/10mm socket or wrench
- Pliers, clean rags, and a small funnel
- Phillips screwdriver (if removing shrouds)
- Gloves and eye protection
Step-by-Step Coolant Change for the DR650SE
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Ensure the engine is stone-cold.
Wait several hours after riding. This prevents burns and ensures accurate draining. -
Remove bodywork if necessary.
The DR650SE offers easy access–no radiators or shrouds to remove. Place your drain pan beneath the water pump or the coolant drain bolt. -
Drain the old coolant.
Loosen the radiator cap first (if equipped with an aftermarket system; stock DR650SE is air/oil-cooled and does not have a standard radiator, but if your specific unit is a rare dealer-modified version, use this procedure).
For the standard DR650SE: Inspect the oil cooler for grime, but there is no coolant to drain in the traditional sense–the DR650SE from the factory uses air/oil cooling rather than liquid coolant. -
Clean and inspect hoses.
Look for cracks or brittleness on any visible hoses if your bike has aftermarket coolant plumbing. -
Flush the system (if liquid-cooled mods exist).
If your bike is running an aftermarket liquid cooling system, run distilled water through to remove any old debris. Cycle the engine (if safe) briefly, then drain again. -
Refill with new coolant (if applicable).
Add the fresh coolant to the fill line. If your DR650SE is still in stock form, this step is skipped; change your engine oil and clean the oil cooler screen instead, following your manual. -
Cycle and burp (liquid-cooled only).
Run the engine for a few minutes with the cap off to let air bubbles escape, then top off as needed. -
Final check.
Ensure no leaks and replace any removed bodywork.
Specific DR650SE Notes You Should Know
- Most 2018 Suzuki DR650SE models are air/oil-cooled – they don&t use liquid coolant in the traditional sense. If your machine is stock, focus on oil change and oil cooler maintenance instead of a coolant flush. A number of aftermarket kits and international market versions do add radiators for extreme climates, but the standard USA-issue DR650SE is air/oil-cooled.
- If you are unsure whether your DR650SE uses liquid coolant, check for a radiator and plumbing near the engine–none means you skip coolant flushes and instead change oil more often, especially after hard off-road riding.
Maintaining Legendary Suzuki Reliability
The DR650SE is respected for its straightforward, low-maintenance design. Keep oil fresh, clean debris from the oil cooler, and inspect the frame for mud buildup after rugged rides. If you ride in extremely hot climates or have modified your DR650SE with a liquid cooling system, follow the step-by-step above for those systems, using quality parts from MotoSport.
Related Shopping Categories
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Shop Radiator Hoses for a 2018 Suzuki DR650SE 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.