If you are referring to the British Customs brackets the hole for the turn signal stalks is small. My new small LED signals have the small diameter stalk and fit correctly. My other "temp" signals are older and I had to fab a small plate with bigger hole to accommodate the larger diameter stalk bolt while transitioning to the LED signals.
One note is I have the triangular Triumph engine dresser bars and that does limit the size or length of the front turn signals with the dresser bars. Small signals will be no problem. Bigger and longer signals will foul my dresser bar with the handle bars at full lock.
