What causes Camchain tensioner wear causing rattling on the Yamaha Yzf-r125?

Cold start rattle, listen for ticking at idle Estimated fix cost: $80-$150

What causes Stator and regulator rectifier failure on the Yamaha Yzf-r125?

Check battery voltage, dimming lights under load Estimated fix cost: $100-$250

Inspect weep hole under pump for coolant residue Estimated fix cost: $50-$120

Ask for service history, check oil condition and colour Estimated fix cost: $100-$300

Known issues to inspect before buying a used Yamaha Yzf-r125. What to check and how much repairs cost.

SERIOUS

Cold start rattle, listen for ticking at idle

Fix cost: $80-$150

SERIOUS

Check battery voltage, dimming lights under load

Fix cost: $100-$250

MODERATE

Inspect weep hole under pump for coolant residue

Fix cost: $50-$120

MODERATE

Ask for service history, check oil condition and colour

Fix cost: $100-$300

☐Cold start the engine yourself

☐Check service history documentation

☐Inspect for crash damage or bent forks

☐Test all electrics including charging system

Reliable if serviced regularly, avoid neglected examples