Quote:

What does Triumph charge for the kit to upgrade the 1600cc Thunderbird to 1700cc?



it is cheaper to do the 1700cc factory kit in the T-bird than it is to have the same 100cc after market up grade done to a 790 twin. As the t-bird kit includes cams and a new tune, you would have to add that to the cost of a 904cc kit for the 790/865 motor.

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