What causes Carb gumming from ethanol fuel sitting on the Yamaha Sr400?

Cold start behavior, idle quality, fuel petcock condition Estimated fix cost: $50-$150

What causes Kickstart mechanism wear or slipping on the Yamaha Sr400?

Kick feel for sponginess, ratchet engagement consistency Estimated fix cost: $100-$300

Service history records, compression test result Estimated fix cost: $80-$200

Smell for fuel leaks, inspect lines visually Estimated fix cost: $20-$60

Known issues to inspect before buying a used Yamaha Sr400. What to check and how much repairs cost.

MODERATE

Cold start behavior, idle quality, fuel petcock condition

Fix cost: $50-$150

MODERATE

Kick feel for sponginess, ratchet engagement consistency

Fix cost: $100-$300

SERIOUS

Service history records, compression test result

Fix cost: $80-$200

SERIOUS

Smell for fuel leaks, inspect lines visually

Fix cost: $20-$60

☐Ask for full service and oil change history

☐Test kickstart multiple times when cold

☐Inspect frame for cracks near welds

☐Check title is clean and matching VIN

Bulletproof if maintained, fragile when neglected