421cc Serval Cylinder Engine Kit

Complete ServalCylinder kit. 421cc 68mm bore with 4mm stroker crankshaft. Kit contains 421cc Serval cylinder, hardware kit, 2, 68mm long rod piston kits, Hot Rods 4mm stroker crankshaft, Pro Design Cool Head, complete gasket kit, complete seal kit. Everything needed to assemble. This is a drop on kit, meaning no crankcase modifications needed. This kit will produce up to 70 horsepower when properly setup and tuned. The cylinder has recreational porting. Part# EK-SV421