What causes Carb sync and jetting issues on the Kawasaki Ninja 500?

Rough idle, hesitation, black smoke at throttle Estimated fix cost: $50-$150

What causes Rectifier/regulator failure on the Kawasaki Ninja 500?

Battery not charging, flickering lights under load Estimated fix cost: $40-$100

Weep hole dripping, low coolant, overheating Estimated fix cost: $80-$200

Oil residue on lower fork legs Estimated fix cost: $60-$150

Known issues to inspect before buying a used Kawasaki Ninja 500. What to check and how much repairs cost.

MODERATE

Rough idle, hesitation, black smoke at throttle

Fix cost: $50-$150

SERIOUS

Battery not charging, flickering lights under load

Fix cost: $40-$100

MODERATE

Weep hole dripping, low coolant, overheating

Fix cost: $80-$200

MINOR

Oil residue on lower fork legs

Fix cost: $60-$150

☐Check coolant and battery charge level

☐Cold start test, listen for smooth idle

☐Inspect fork legs for oil residue

☐Test ride for smooth throttle response

Solid beginner bike, parts cheap and available