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Big Bore Kit, Scooter 80cc with 64mm Head Asy GY6 upgrade

80cc Big Bore Kit with 64mm Valve Head Assembly For scooters with 139QMB or 139QMI engines Scooter  Before ordering please ensure you order the BBK with the correct length Valves for your Head Assembly. You head should look like one of the 2 in the 2nd picture.

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  • $77.00
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80cc Big Bore Kit with 64mm Valve Head Assembly

For scooters with 139QMB or 139QMI engines Scooter 
Before ordering please ensure you order the BBK with the correct length Valves for your Head Assembly. You head should look like one of the 2 in the 2nd picture.

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