100cc QMB139 50mm Piston Kit GY6 Engine is backordered and will ship as soon as it is back in stock.
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50mm Piston with Pin ,Rings and Cir Clips for GY6 50 139qmb 4-stroke engines.
* Piston Diameter: 50mm
* Wrist Pin Diameter: 13mm
* Piston Pin Length: 38mm
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