Naraku 139QMB 52.4mm Big Bore Cylinder & Head Kit | 89.3cc seats Spline Count: Standard 19-Spline GY6

Spline Count: Standard 19-Spline GY6 Crankshaft

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Naraku 139QMB 52.4mm Big Bore Cylinder & Head Kit | 89.3cc seats Spline Count: Standard 19-Spline GY6Unlock serious performance gains with the Naraku QMB139 52. 4mm Big Bore Cylinder & Head Kit. Engineered for QMB139 4 stroke 50cc engines, this complete kit bumps displacement to 89. 3cc with a stock 41. 4mm stroke or all the way to 94. 9cc when paired with a 44mm stroker crank. Everything you need for the swap is included. What's Included Cylinder (52. 4mm bore) Piston, rings, piston pin & circlips Cylinder head Head gasket & base gasket Key Features