What causes Carburetor clogging and poor idle on the Keeway Rkr 125?

Cold start behavior, rough idle, hesitation on throttle Estimated fix cost: $20-$60

What causes Rectifier/regulator failure, battery drain on the Keeway Rkr 125?

Battery voltage with engine running, check for 13.5-14.5V Estimated fix cost: $30-$80

Chain slack, sprocket teeth sharpness, chain stretch Estimated fix cost: $40-$90

Panel gaps, cracked mounting tabs, rattles at idle Estimated fix cost: $10-$50

Known issues to inspect before buying a used Keeway Rkr 125. What to check and how much repairs cost.

MODERATE

Cold start behavior, rough idle, hesitation on throttle

Fix cost: $20-$60

SERIOUS

Battery voltage with engine running, check for 13.5-14.5V

Fix cost: $30-$80

MODERATE

Chain slack, sprocket teeth sharpness, chain stretch

Fix cost: $40-$90

MINOR

Panel gaps, cracked mounting tabs, rattles at idle

Fix cost: $10-$50

☐Test ride above 7000 RPM for smoothness

☐Check for oil leaks around head gasket

☐Inspect brake disc thickness both ends

☐Verify service history and oil change records

Decent budget bike, maintenance-dependent reliability