Naraku GY6 63mm Big Bore Kit

Naraku GY6 63mm Big Bore Kit

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Part Number: 137-11

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img-qind.JPGNaraku 63mm Forged Piston Big Bore Kit for 150cc and 125cc GY6 4-stroke engines and engine based vehicles. Crankcase modifications are needed for this cylinder kit. Increases displacement to 180cc!


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  • Bore: 63mm
  • Outer Sleeve Diameter: 64.9mm
  • Displacement Increase to 180cc
  • Overall Height (cylinder): 90mm

GY6 QMI/QMJ 152/157, Various unlisted makes/models

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