What causes Carburetor clogging and fuel delivery issues on the Yamaha Yzf-r15s?

Rough idle, hesitation on throttle, black smoke Estimated fix cost: $30-$80

What causes Chain and sprocket wear from neglect on the Yamaha Yzf-r15s?

Slack, rust, skipping under load Estimated fix cost: $40-$90

Oil stains on lower fork legs, spongy braking Estimated fix cost: $60-$120

Weak battery, dim lights, random stalling Estimated fix cost: $80-$150

Known issues to inspect before buying a used Yamaha Yzf-r15s. What to check and how much repairs cost.

MODERATE

Rough idle, hesitation on throttle, black smoke

Fix cost: $30-$80

MODERATE

Slack, rust, skipping under load

Fix cost: $40-$90

SERIOUS

Oil stains on lower fork legs, spongy braking

Fix cost: $60-$120

SERIOUS

Weak battery, dim lights, random stalling

Fix cost: $80-$150

☐Check service history and oil condition

☐Test ride for vibration and gear shifts

☐Inspect frame for crash damage or welds

☐Verify odometer matches overall wear

Decent budget bike, maintenance history matters most