I didn't know 6 cly 914's came with webers or did it ? I'm not laughing I'm just surprised to learn that there was a 914-6 in town. Those dang things would haul ass when things were right. What kind of Webers 40mm ,44mm,48mm ? Those carbs had a idle, mid range, high range jetting if I remember right. You might call Waymon at Eurasian Auto. He may work on them or know someone who does. Good Luck with that one.