High quality cast iron cylinder kit Sport from Polini for Suzuki Katana 68 cc LC with 47mm bore and an aluminium head. This kit produces 6.5hp at 10000rpm. Fitting this kit may require adjustment of the carburettor and variator roller weights. It should only be fitted by someone with the mechanical ability and equipment to rebuild and set up the engine correctly . It is also recommended to increase the gear ratios to prevent over reving and reducing reliability of the engine. Polini Sport 70cc Cylinder Kit - Morini 50cc Liquid Cooled