What causes Carburetor clogging from old fuel on the Kawasaki Ninja 250?

Hard starting, rough idle, or hesitation during acceleration Estimated fix cost: $50-$150

What causes Regulator/rectifier failure killing battery on the Kawasaki Ninja 250?

Dim lights, dead battery, voltage above 15V at idle Estimated fix cost: $80-$200

Excessive slack, hooked sprocket teeth, chain stretch Estimated fix cost: $100-$200

Bike dying at speed, low AC output from stator Estimated fix cost: $150-$300

Known issues to inspect before buying a used Kawasaki Ninja 250. What to check and how much repairs cost.

MODERATE

Hard starting, rough idle, or hesitation during acceleration

Fix cost: $50-$150

SERIOUS

Dim lights, dead battery, voltage above 15V at idle

Fix cost: $80-$200

MODERATE

Excessive slack, hooked sprocket teeth, chain stretch

Fix cost: $100-$200

SERIOUS

Bike dying at speed, low AC output from stator

Fix cost: $150-$300

☐Check for crash damage on fairings and frame

☐Verify cold start with no choke assistance

☐Inspect fork seals for oil weeping

☐Test both brakes for firm lever feel

Very reliable if properly maintained and not abused