What causes Stator/charging system failure on the Yamaha Mt-25?

Battery voltage at idle, dimming lights, dead battery symptoms Estimated fix cost: $150-$300

What causes Coolant leaks from water pump seal on the Yamaha Mt-25?

Weep hole under engine for coolant residue or staining Estimated fix cost: $80-$150

Idle stability, surging at low RPM, fuel consumption Estimated fix cost: $50-$100

Known issues to inspect before buying a used Yamaha Mt-25. What to check and how much repairs cost.

SERIOUS

Battery voltage at idle, dimming lights, dead battery symptoms

Fix cost: $150-$300

MODERATE

Weep hole under engine for coolant residue or staining

Fix cost: $80-$150

MINOR

Idle stability, surging at low RPM, fuel consumption

Fix cost: $50-$100

☐Check service history and coolant condition

☐Test ride above 8000 RPM for smoothness

☐Inspect frame for crash damage or welds

☐Check charging voltage with multimeter

Generally reliable, maintain coolant and charging system