What causes Sticking throttle bodies / rough idle on the Honda Cb400x?

Rev engine cold, listen for hunting or surging idle Estimated fix cost: $150-$300

What causes Corroded exhaust headers from neglect on the Honda Cb400x?

Inspect header pipes for rust, pitting, or leaks Estimated fix cost: $50-$400

Look for oil residue on lower fork legs Estimated fix cost: $150-$250

Bounce test rear, check for excessive bounce or leaks Estimated fix cost: $200-$600

Known issues to inspect before buying a used Honda Cb400x. What to check and how much repairs cost.

MODERATE

Rev engine cold, listen for hunting or surging idle

Fix cost: $150-$300

MINOR

Inspect header pipes for rust, pitting, or leaks

Fix cost: $50-$400

MODERATE

Look for oil residue on lower fork legs

Fix cost: $150-$250

MODERATE

Bounce test rear, check for excessive bounce or leaks

Fix cost: $200-$600

☐Check service history and oil change intervals

☐Test ride for smooth gear shifts throughout

☐Inspect chain and sprocket wear closely

☐Verify no warning lights on dash

Very reliable, minor issues only with maintenance neglect