Naraku 139QMB 52.4mm Big Bore Cylinder & Head Kit | 89.3cc 120/70/10 5mm (1/3 inch)

5mm (1/3 inch)

This product is not legal for use on pollution-controlled vehicles in California

Ships via US domestic ground only — not available for international

Vibration Resistant

Naraku 139QMB 52.4mm Big Bore Cylinder & Head Kit | 89.3cc 120/70/10 5mm (1/3 inch)Unlock 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