750cc conversion kit (T120 Routt big bore kit)  9:1 Comp Convert your T120/TR6 9 stud to a full 750. Uk manufacturer. Use your own cylinder head , just replace the barrels and pistons. Comes complete with head gasket (10 stud kit available to use with a T140 cyl head on request) (please note that the barrel is non oil feed at the tappet blocks)