How to Change the Coolant in a 2020 Yamaha XT250
Shop parts for a 2020 Yamaha XT250 Dirt Bike.
Regular coolant changes are essential to keep your 2020 Yamaha XT250 running cool on the trails and streets. While Yamaha's time-tested air-cooled engine design keeps maintenance straightforward, this guide covers the steps unique to your XT250, best practices, and a few crucial notes that every owner should know to avoid mistakes.
Why Coolant Changes Matter
Old or contaminated coolant loses its ability to dissipate heat and prevent corrosion, which can lead to overheating or internal engine damage if ignored. Yamaha recommends checking and potentially replacing the coolant as part of regular maintenance intervals, especially if you ride in hot, dusty, or demanding conditions.
What You'll Need
- Appropriate coolant (Yamaha's Yamaha-lube coolant or equivalent, pre-mixed or mixed as directed by the product)
- Distilled water (only if diluting concentrate)
- Drip pan or container for old coolant
- 8mm and 10mm sockets and a ratchet
- Screwdrivers (Phillips and flat-head)
- Rubber gloves and shop towels
- Torque wrench (recommended)
Step-by-Step Coolant Changing Guide
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Preparation
Ensure the bike is completely cool before starting. Set the XT250 on a level surface and use a stand if you have one. Remove the side panels and the seat to access the radiator cap and overflow reservoir. -
Draining the Old Coolant
- Place a drain pan under the water pump (right side of the engine).
- Remove the radiator cap to allow air into the system for effective draining. (Always remove the cap while the engine is cool–a hot system is under pressure and can spray hot fluid.)
- Locate and remove the coolant drain bolt near the bottom of the water pump, including its sealing washer. Allow all coolant to drain out.
- Open (but don't remove) the radiator overflow reservoir cap to ensure system drains completely.
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Flushing the System (Optional, Recommended if Changing Coolant Type)
If switching types (e.g., from silicate to non-silicate), flush the system with distilled water. Reinstall the drain bolt, fill with distilled water, and run the engine briefly, then drain again to avoid mixing different coolant chemistries. -
Reassembly and Refilling
- Install or replace the drain plug gasket, then reinstall and torque the drain bolt to Yamaha specs (do not overtighten).
- Fill the radiator slowly with new coolant up to the bottom of the filler neck. Fill the reservoir to its upper mark.
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Bleed Air (Burping the System)
With the radiator cap still off, start the engine and let it idle for several minutes. Gently blip the throttle and rock the bike side to side to release any trapped air bubbles. As air escapes, top up the coolant if the level drops. -
Final Steps
- Once no more air bubbles appear, top the coolant to the correct level, reinstall the radiator cap securely, and refill the overflow reservoir if needed.
- Double-check for leaks at all drain points and hose clamps.
- Run the bike up to full operating temperature and let it fully cool down. Recheck coolant levels in the radiator and reservoir, topping off as needed.
- Reinstall the side panels and seat.
- Dispose of old coolant responsibly at a recycling center or auto parts store.
2020 Yamaha XT250 Model-Specific Notes
- The XT250's simple engine layout and minimalist bodywork make coolant changes relatively quick compared to performance dirt bikes with dual radiators.
- Yamaha's OEM coolant or equivalent is highly recommended to preserve seals and cooling passages in the long term.
- XT250 models may have a slightly smaller coolant capacity than race bikes–always consult your owner's manual for the precise amount, but generally expect to use around 1 to 1.2 liters.
- If riding in mud or dusty environments, periodically check the radiator fins for debris, as airflow blockages can cause overheating even with fresh coolant.
Common Mistakes to Avoid
- Never use tap water to mix coolant–the minerals will deposit inside your radiator and cooling passages, potentially clogging the system.
- Don't overfill the reservoir–leave space for thermal expansion.
- Never mix different coolant types unless compatible–doing so can lead to chemical reactions that reduce corrosion protection and cooling performance.
- Always check for leaks after the first ride post-service.
Stay Cool and Ride On
Following this guide helps you keep your 2020 Yamaha XT250's engine protected, running smoothly, and ready for any adventure. A well-maintained cooling system offers peace of mind and prolongs the life of your motorcycle—on the pavement or the trail.
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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.