I installed the D&D big bore kit this weekend and took an interesting picture of the pistons that I had on hand. from the left they are a Wiseco 10.5:1, and a JE 12:1, and the stock triumph (with some extra carbon).


nikasil barrels -

05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter