What causes Carburetor gumming from ethanol fuel sitting on the Feiling Underbone 110 Cub?

Rough idle, hard start, black smoke at startup Estimated fix cost: $20-$60

What causes Worn cam chain tensioner causes rattling on the Feiling Underbone 110 Cub?

Metallic rattle on cold start, top-end noise Estimated fix cost: $30-$80

Oil streaks on fork legs, spongy front brake feel Estimated fix cost: $40-$90

Intermittent starting issues, flickering lights Estimated fix cost: $10-$30

Known issues to inspect before buying a used Feiling Underbone 110 Cub. What to check and how much repairs cost.

MODERATE

Rough idle, hard start, black smoke at startup

Fix cost: $20-$60

SERIOUS

Metallic rattle on cold start, top-end noise

Fix cost: $30-$80

MODERATE

Oil streaks on fork legs, spongy front brake feel

Fix cost: $40-$90

MINOR

Intermittent starting issues, flickering lights

Fix cost: $10-$30

☐Cold-start the engine before buying

☐Check for frame welds, cracks, or bends

☐Inspect chain, sprockets for stretch or wear

☐Listen for top-end rattle at idle

Decent budget commuter, parts cheap and available