Naraku QMB139 47mm 72cc Performance Cylinder Kit

Naraku 50cc QMB139 4-stroke 47mm Big Bore Cylinder Kit. Kit includes cylinder, piston, rings, piston pin, cir clips, head gasket, base gasket, exhaust gasket and cam chain tensioner gasket.

This is a drop in cylinder kit, no crank case modifications required! When used in conjunction with a stock stroke of 41.4mm the total displacement comes out to 72cc.

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• Upgrades to 72cc
• Cylinder Bore: 47mm
• Cylinder Sleeve Outer Diameter: 53.1mm 
• Wrist Pin Diameter: 13mm
• Total Piston Height: 34.1mm