What causes Stator/charging system failure on the Yamaha Yzf-r25?

Battery voltage at idle, flickering lights, dead battery Estimated fix cost: $150-$300

What causes Coolant leak from water pump seal on the Yamaha Yzf-r25?

Weep hole beneath engine for coolant residue Estimated fix cost: $80-$150

Rattling on cold start, service history available Estimated fix cost: $60-$120

Oil residue on lower fork legs Estimated fix cost: $80-$160

Known issues to inspect before buying a used Yamaha Yzf-r25. What to check and how much repairs cost.

SERIOUS

Battery voltage at idle, flickering lights, dead battery

Fix cost: $150-$300

MODERATE

Weep hole beneath engine for coolant residue

Fix cost: $80-$150

MODERATE

Rattling on cold start, service history available

Fix cost: $60-$120

MINOR

Oil residue on lower fork legs

Fix cost: $80-$160

☐Check for service records and oil change history

☐Cold-start the bike, listen for chain rattle

☐Inspect coolant level and color under cap

☐Test ride above 8000 RPM for charging issues

Solid learner bike, maintain cooling system religiously