Naraku QMB139 47mm 72cc Performance Cylinder Kit
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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. Upgrades to 72cc Cylinder Bore: 47mm Cylinder Sleeve Outer Diameter: 53.1mm Wrist Pin Diameter: 13mm Total Piston Height: 34.1mm QMB139 50cc/49cc , Various unlisted makes/models This product is not intended for use on public roads or land.
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