What causes Carburetor clogging from ethanol fuel sitting on the Yamaha Yzf600r?

Hard starting, rough idle, inspect carb bowls for varnish Estimated fix cost: $80-$200

What causes Fork seal leaks on high-mileage bikes on the Yamaha Yzf600r?

Oil streaks on lower fork legs, spongy front end Estimated fix cost: $100-$250

Check charging voltage, battery condition, melted connectors Estimated fix cost: $60-$150

Inspect coolant color, radiator condition, thermostat function Estimated fix cost: $30-$80

Known issues to inspect before buying a used Yamaha Yzf600r. What to check and how much repairs cost.

MODERATE

Hard starting, rough idle, inspect carb bowls for varnish

Fix cost: $80-$200

MODERATE

Oil streaks on lower fork legs, spongy front end

Fix cost: $100-$250

SERIOUS

Check charging voltage, battery condition, melted connectors

Fix cost: $60-$150

MODERATE

Inspect coolant color, radiator condition, thermostat function

Fix cost: $30-$80

☐Cold start test for carb health

☐Check frame for crash damage or welds

☐Verify service history and valve checks

☐Test ride for smooth power delivery

Solid, durable bike if properly maintained