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This page is retained for technical reference, scooter compatibility, servicing information and historical product documentation.
Browse compatible alternativesReplacement secondary gear kit assembly for 50cc Chinese GY6 engines (139QMA/B) as fitted to most 4-Stroke Chinese 50cc mopeds.
This is STANDARD! and will not change the gearing of your moped, only fit it if it has the same number of teeth as your broken one.
Teeth: 15, 52
These gears are pre-pressed and a straightforward replacement.