What causes Weak CDI/stator, no-spark or hard starting on the Haojin Dyna (hj110-2d Or Similar)?

Cold start, check charging voltage at idle 13-14V Estimated fix cost: $40-$90

What causes Carburetor gumming, idle hunting and stalling on the Haojin Dyna (hj110-2d Or Similar)?

Steady idle, throttle response, fuel leaks at bowl Estimated fix cost: $25-$60

Tapping noise at idle, blue smoke, compression test Estimated fix cost: $150-$400

Bounce rear, rock wheels, check chain and sprockets Estimated fix cost: $50-$150

Known issues to inspect before buying a used Haojin Dyna (hj110-2d Or Similar). What to check and how much repairs cost.

MODERATE

Cold start, check charging voltage at idle 13-14V

Fix cost: $40-$90

MINOR

Steady idle, throttle response, fuel leaks at bowl

Fix cost: $25-$60

SERIOUS

Tapping noise at idle, blue smoke, compression test

Fix cost: $150-$400

MINOR

Bounce rear, rock wheels, check chain and sprockets

Fix cost: $50-$150

☐Verify VIN matches title and frame

☐Cold start without starting fluid

☐Test all lights, horn, brakes

☐Ride test through all gears

Cheap and fixable, but low-quality parts wear fast