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There are no more items in your cart 110cc kit for Yamaha 2 stroke Jog90 and Jog50. Ceramic super large air ports cylinder, light weight. Should be used with long stroke crankshaft 45mm. Bigger carburetor and manifold are needed. Engine boring is needed if you are going to install this cylinder for Jog50. For Jog90 it can be installed without any modifications