What causes Rectifier/regulator failure, kills battery and charging on the Kawasaki Ninja 650?

Voltage at idle and revs, look for melted connector Estimated fix cost: $80-$200

What causes Throttle bodies need sync and balance service on the Kawasaki Ninja 650?

Rough idle, hesitation, uneven throttle response Estimated fix cost: $100-$200

Oil film on fork tubes, soft front end feel Estimated fix cost: $150-$300

Ticking noise first 30 seconds after cold start Estimated fix cost: $50-$150

Known issues to inspect before buying a used Kawasaki Ninja 650. What to check and how much repairs cost.

SERIOUS

Voltage at idle and revs, look for melted connector

Fix cost: $80-$200

MODERATE

Rough idle, hesitation, uneven throttle response

Fix cost: $100-$200

MODERATE

Oil film on fork tubes, soft front end feel

Fix cost: $150-$300

MINOR

Ticking noise first 30 seconds after cold start

Fix cost: $50-$150

☐Check for crash damage on fairings and levers

☐Verify service history, especially valve clearances

☐Test ride cold start for unusual noises

☐Inspect chain, sprockets, and tire wear condition

Very reliable, excellent beginner bike choice