How to Change the Coolant in a 1995 Yamaha XT350
Shop parts for a 1995 Yamaha XT350 Dirt Bike.
Changing the coolant in your 1995 Yamaha XT350 is a straightforward but essential maintenance task that ensures optimal engine cooling and longevity. This step-by-step guide from MotoSport is crafted specifically for XT350 owners, highlighting key process points and unique aspects of this model.
What You Will Need
- Fresh motorcycle coolant (Yamaha-approved or equivalent, pre-mixed or mix yourself using distilled water)
- Socket wrench set (including a 10mm socket)
- A drain pan
- Fresh sealing washer for drain bolt
- Safety gloves and eye protection
- Clean rags
Steps to Change Coolant on the 1995 XT350
- Preparation
- Ensure the engine is completely cool. Hot coolant can cause serious burns.
- Park the bike on a stable, level surface and remove any necessary plastic covers to access the radiator and engine connections.
- Drain Old Coolant
- Locate the coolant drain bolt – typically, it is a 10mm bolt on the steel pipe connecting the cylinder block to the water pump (on the left side of the engine).
- Position a drain pan beneath the bolt and loosen it. Remove the bolt and allow all old coolant to drain completely.
- If equipped, also remove the radiator cap to help the coolant drain faster. Replace the sealing washer on the drain bolt for a proper seal.
- Flush the System (Optional but Recommended)
- If the coolant was dirty or if regular maintenance was neglected, flush the system with distilled water before refilling. Fill with distilled water, run the engine briefly, and repeat the draining process. Do not use tap water to avoid mineral buildup in the system.
- Refill with Fresh Coolant
- Tighten the drain bolt securely after flushing. Slowly pour new coolant into the radiator up to the filler neck, allowing air to escape and fill the system completely.
- The XT350, like many Yamaha single-cylinders, relies on a well-bled cooling system for peak performance. To purge trapped air, locate the pump purge (bleeder) bolt and carefully loosen it to release trapped air as you fill, then retighten the bolt once only coolant comes out. This step helps prevent hot spots and overheating.
- Also top off the reservoir tank to the correct level; XT350's design uses this as an expansion tank for dealing with coolant overflow during engine heat cycles.
- Run & Burp the System
- With the radiator cap still off, start the engine and let it idle. Gently rev the throttle a few times and rock the bike to help dislodge air bubbles. When the engine reaches normal operating temperature, shut it off and allow it to cool fully.
- Recheck coolant levels in both the radiator and reservoir – top up as necessary. Securely install the radiator cap when completely filled.
Final Checks & Notes for the XT350 Owner
- Dispose of old coolant responsibly. Used coolant is toxic and should never be dumped on the ground or into drains.
- If you notice persistent air bubbles or a continually dropping coolant level after multiple heat cycles, inspect for gasket leaks or cracks, as the XT350 is a robust but aging air-liquid cooled engine.
- Keep in mind the Yamaha XT350's simple-but-efficient cooling design: regular maintenance of the cooling system is crucial, as overheating can cause top-end engine damage.
For reliable performance and engine longevity, Yamaha recommends checking coolant level every ride and performing a complete coolant change at least every two years—more often if riding in demanding conditions.
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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.