These are on my '94 Waveblaster(sorry no pics) the motor has a Protec head and porting and dual carbs. There are no chokes but ther is a barbed fitting in the spot where the shafts for the choke would have been but nothing on the other side. measuring under the throttle plates its about 44mm. They are Mikuni's with a square 4 bolt cover on the jet side. Thanks!