We all know I've been wrong before, but I bought a box of 37 intake runners to go with the dozen or do I had. None were marked. The 1200's were obvious, but the rest I had to measure and my findings were that they vary quite a bit. I assumed, but maybe incorrectly, that the 78-79's were the same as the 1100's. I can't say that for sure. I did have a set of 1100 carbs. I had a bunch that were pretty close to 1.4+- inches for the 1000 carbs which I assumed were early years. The others were nearer 1.3+- inches. I don't own, nor have I had, a set of 78-79 to compare. So I stand to be corrected. I think it's worthwhile to make sure all four are relatively close to the same. Real close to the same. I helped a guy who had a 77 with 78 carbs on it. In trying to get it run right we found three runners near 1.4" and one that was near 1.3"
Whatever I suggest here should be given ample time for a moderator to delicately correct. I apologize in advance.
77 WING, 1200 engine with 77 heads, cams, gl1100 foot pegs, Magna V65 front end, 764A carbs, [-gone Suzuki M109 monoshock--, replaced with gl1100 shocks] gl 1200 swing arm, gl1500 final drive, wheel and rear brakes Valkyrie seat, Meanstreak tank, Sportster pipes, Power Arc ignition off crank.
77 Wing. black
83 Wing, in pieces
"Continuing education is important even if the subject matter is fairly useless (as in this case)."---Greg Foresi