search all of the other 'no fire on right side' posts.
swap the right and left coils, check the battery cables, check the main ground strap. If it doesn't go away or move to the left, then it might be time to look at an ignitor (refer to many ignitor threads)

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