What causes Cam chain tensioner rattle at startup on the Honda Cb125r?

Cold start noise, metallic rattling from engine top Estimated fix cost: $80-$200

What causes Throttle-by-wire sensor glitches on the Honda Cb125r?

Jerky throttle response, erratic idle, warning lights Estimated fix cost: $150-$400

Oil residue on lower fork legs, soft front end Estimated fix cost: $80-$150

Coolant level, radiator fins blocked, fan operation Estimated fix cost: $0-$50

Known issues to inspect before buying a used Honda Cb125r. What to check and how much repairs cost.

MODERATE

Cold start noise, metallic rattling from engine top

Fix cost: $80-$200

MODERATE

Jerky throttle response, erratic idle, warning lights

Fix cost: $150-$400

MINOR

Oil residue on lower fork legs, soft front end

Fix cost: $80-$150

MINOR

Coolant level, radiator fins blocked, fan operation

Fix cost: $0-$50

☐Cold start the bike, listen for rattles

☐Check service history for cam chain work

☐Test throttle smoothness at all RPM ranges

☐Inspect forks and coolant for leaks

Generally reliable, but pricey parts for small bike