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crankshaft with 16 tooth oil pump driven sprocket for 139QMB/QMA
In the GY6 engines already 2 different versions are installed factory. They differ only in the drive gear for the oil pump on the right side. The old version is used in almost all scooters and has a gear with 16 teeth. The new version has 22 teeth and is used for new Rex models.
Please note, that vehicle spare parts should only be installed by a qualified specialist workshop to ensure their proper function and the road safety of the vehicle.:
