How to Change the Coolant in a 2022 Yamaha TTR125L: MotoSport Guide
Shop parts for a 2022 Yamaha TTR125L Dirt Bike.
Maintaining your 2022 Yamaha TTR125L is essential for smooth performance and longevity, especially when it comes to keeping the coolant fresh. This model uses an air-cooled engine, so while most major coolants changes relate to liquid-cooled bikes, it's important to ensure all lubricants and fluids associated with the system are checked regularly. However, if your bike features aftermarket or added cooling systems, follow these complete steps for a robust coolant change and flush.
What Makes the TTR125L Unique?
The TTR125L is known for its simplicity and reliability, featuring an air-cooled, four-stroke engine. Unlike liquid-cooled models, the TTR125L's engine oil plays a significant role in regulating temperature along with airflow across its cooling fins. If aftermarket liquid cooling was installed, follow the below procedure; otherwise, maintain oil changes at Yamaha's specified intervals and keep cooling fins clean for optimal performance. Always check your service manual for model-specific details.
Tools & Supplies Needed
- Correct coolant type (only if aftermarket cooling system added; otherwise, use recommended engine oil)
- Socket set (typically 8mm or 10mm for drain bolts)
- Drain pan
- Funnel
- Distilled water (for flushing, if needed)
- Shop towels or rags
- Protective gloves
- New crush washer (if required)
How to Change Coolant (For Aftermarket or Modified Systems)
- Preparation: Ensure the engine is completely cool before starting. Place your bike on a stable stand.
- Access Radiators: Remove side shrouds or panels as needed to access the radiator fill cap.
- Remove Radiator Cap: Slowly open the radiator cap to relieve pressure, then fully remove it.
- Drain Old Coolant: Position the drain pan under the water pump or designated drain bolt. Remove the drain bolt; allow all coolant to drain. If your system has a reservoir, drain and rinse it with distilled water.
- Flush (Optional): For a full flush, re-install the drain bolt (with a new crush washer if needed), fill the system with distilled water, and run the engine briefly. Turn off, cool, and drain again.
- Reinstall Drain Bolt: Replace and torque the drain bolt to specification.
- Add Fresh Coolant: Pour new coolant slowly through the radiator neck or reservoir. Tap radiator hoses or gently rock the bike to expel air bubbles. Some systems have bleeder bolts–loosen until coolant escapes, then tighten.
- Bleed the System: Fill to the lower lip, reinstall the cap, and start the bike. Let it idle up to operating temperature. Shut off and allow to cool. Check and top off to the correct level if necessary. Inspect for leaks.
Tips and Final Checks
- Never mix coolant types unless specifically compatible.
- Dispose of old coolant responsibly at a recycling facility–it is toxic to pets and the environment.
- Monitor your TTR125L after the first ride and double-check the fluid level once the engine has cooled, as trapped air may burp out, lowering the level slightly.
Routine Maintenance for Stock TTR125L
If your TTR125L remains stock (air-cooled), you will not have liquid coolant to change. Instead:
- Regularly change the engine oil and filter at recommended intervals.
- Clean cooling fins of mud, debris, and dirt to promote air flow.
- Inspect for oil or exhaust leaks that might affect cooling efficiency.
Important Notes for TTR125L Owners
- Always confirm whether your model is stock or modified with liquid cooling.
- Consult your owner's manual for all torque specifications and service intervals.
- If in doubt, contact your local Yamaha dealer or a trusted MotoSport professional for advice specific to your ride.
Your TTR125L is designed for durability and fun–keep fluids fresh, inspect often, and you'll enjoy many trouble-free adventures.
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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.