What causes Carburettor gumming and poor idle on the Feiling Fl110 Underbone (cub-style 110cc)?

Cold start behaviour, idle smoothness, throttle response Estimated fix cost: $10-$30

What causes Cam chain stretch and engine rattle on the Feiling Fl110 Underbone (cub-style 110cc)?

Rattling on startup, listen at top of engine Estimated fix cost: $40-$80

Test all lights, horn, indicators before buying Estimated fix cost: $15-$40

Pull brake lever, check pedal travel and bite Estimated fix cost: $20-$50

Known issues to inspect before buying a used Feiling Fl110 Underbone (cub-style 110cc). What to check and how much repairs cost.

MINOR

Cold start behaviour, idle smoothness, throttle response

Fix cost: $10-$30

MODERATE

Rattling on startup, listen at top of engine

Fix cost: $40-$80

MINOR

Test all lights, horn, indicators before buying

Fix cost: $15-$40

MODERATE

Pull brake lever, check pedal travel and bite

Fix cost: $20-$50

☐Cold start it, listen for rattles

☐Check for oil leaks around head gasket

☐Test all electrics and indicators

☐Inspect chain, sprockets, tyre wear

Decent budget commuter, maintenance is cheap