521cc Super cub kit. This comes with the 521cc cub cylinder 72mm bore, 72mm Wiseco pistons, Play drag porting. A new 10mil (64 x 115) long rod crank trued pinned and double welded with Koyo Japan bearings. All seals and gaskets, water plugs, stud extenders, head studs, head and domes. Text 858-945-3622 or email kev@herrjugsracing.com for order or custom setups.