What causes Carburetor clogging and poor idle on the Haojin Dyna HJ110-2D?

Cold start behavior, idle smoothness, fuel flow at petcock Estimated fix cost: $10-$25

What causes Worn cam chain causing engine rattle on the Haojin Dyna HJ110-2D?

Cold start metal rattling noise from upper engine Estimated fix cost: $30-$60

Electric start response, headlight brightness at idle Estimated fix cost: $15-$45

Bounce test rear end, inspect shock body for oil leaks Estimated fix cost: $20-$50

Known issues to inspect before buying a used Haojin Dyna HJ110-2D. What to check and how much repairs cost.

MINOR

Cold start behavior, idle smoothness, fuel flow at petcock

Fix cost: $10-$25

MODERATE

Cold start metal rattling noise from upper engine

Fix cost: $30-$60

MODERATE

Electric start response, headlight brightness at idle

Fix cost: $15-$45

MODERATE

Bounce test rear end, inspect shock body for oil leaks

Fix cost: $20-$50

☐Cold start without choke struggle

☐Check frame welds for cracks

☐Test brakes for fade or sponge

☐Inspect chain and sprocket wear

Decent budget commuter, parts cheap and available