What causes Coolant system leaks or overheating on the Yamaha Mt-125?

Inspect radiator, hoses, and coolant level before buying Estimated fix cost: $80-$200

What causes Throttle body issues causing rough idle on the Yamaha Mt-125?

Start cold, listen for hunting idle or stalling Estimated fix cost: $50-$150

Look for oil residue on lower fork legs Estimated fix cost: $100-$250

Ask for service history, listen for ticking at startup Estimated fix cost: $150-$350

Known issues to inspect before buying a used Yamaha Mt-125. What to check and how much repairs cost.

MODERATE

Inspect radiator, hoses, and coolant level before buying

Fix cost: $80-$200

MODERATE

Start cold, listen for hunting idle or stalling

Fix cost: $50-$150

MODERATE

Look for oil residue on lower fork legs

Fix cost: $100-$250

SERIOUS

Ask for service history, listen for ticking at startup

Fix cost: $150-$350

☐Check service history for valve inspections

☐Inspect coolant and fork seals visually

☐Test cold start idle behavior

☐Look for crash damage on fairings and levers

Generally reliable, maintenance history is critical