What causes Carburetor jetting issues causing poor running on the Rieju Marathon 500?

Cold start behavior, throttle response, plug color Estimated fix cost: $50-$150

What causes Electrical gremlins from poor Spanish wiring on the Rieju Marathon 500?

All lights, indicators, kill switch function Estimated fix cost: $80-$200

Bounce rear end, feel for clunks or play Estimated fix cost: $100-$250

Service history, compression test, oil condition Estimated fix cost: $200-$800

Known issues to inspect before buying a used Rieju Marathon 500. What to check and how much repairs cost.

MODERATE

Cold start behavior, throttle response, plug color

Fix cost: $50-$150

MODERATE

All lights, indicators, kill switch function

Fix cost: $80-$200

SERIOUS

Bounce rear end, feel for clunks or play

Fix cost: $100-$250

SERIOUS

Service history, compression test, oil condition

Fix cost: $200-$800

☐Run engine cold, check startup behavior

☐Inspect frame welds for cracks

☐Check chain, sprockets for wear

☐Verify service history exists

Decent budget bike, maintenance-dependent longevity