A 14 has the same crank as A15, bore is bigger 82mm i think,A14 is 76mm.Bore it out to 77mm and you get what thay call a square motor 77mm stroke 77mm bore thats what i did.Bit of head work scaveng plate in sump advanced the cam a bit, good carby, good fuel, pointless dizy, timing dead on the rite place, 2in ex/pipe to.Thats good for a bit of street fighter.