Great day today. I did the first synchronizing after the brake in, at 9500 miles.
The #1 and #2 carburetors were off by about 15% (#1 higher than #2). Both adjusted to average 21 cmHg. (showing cylinder 1, 2, 3, 4) The bike is leaning very slightly, perhaps 2 - 3 degrees, to the left.
Then the same thing with carb #2 and #3. Same average 21 cmHg. (showing cylinders 5, 6, 3, 4)
I don't know how accurate the Carbtune Pro is with numbers. I haven't calibrated it nor checked against a reliable vacuum reader, so I don't know if these numbers reflect actual vacuum reading. But the manufacturer guarantees them to be set correctly, and I am going with this. And Ass the engine is right after a full rebuild, I don't really care about the numbers. The important thing is they are all at 21 average and synchronized. Next time around I will play with hooking them up one by one to one port and see if they read identical. But so far, they performed flawlessly on other bikes.
I also cleaned and checked all the spark plugs (set at 0.75 mm). I used Colortune to check the air/fuel ratio visually. I aimed at good bunsen blue and nice transmission to bright orange and yellow with a twist of the throttle. I don't remember what exactly the settings were for each cylinder, and I haven't counted the turns now, so I am just guessing all are set at about 2 - 2.5 turns as I turned them back 1 - 1.5 turns. I am going to take a look at the valve clearances soon, so I will be revisiting synchronizing and air/fuel mix and I will count the turns then.
Right now I just wanted to quickly synchronize the carbs and to check the ratio. The bike runs much better! Very smooth, better response on acceleration. Also, the gears change smoother.I am very pleased, the bike rides flawlessly.
Having the tank off I also finally hooked up the fuel gauge. I used a gauge from an unknown bike. I've already checked the resistance (there are numbers for it in the manual), and adjusted the range for empty and full.
Since the male plug was missing, I got an exactly the same Honda plug and it fit perfectly the one on the harness. The wires have different colors, it's good to remember that the vertical connector is live, and the horizontal is ground. I put 10 liter on an almost empty tank and it shows a bit below half on a bit tilted bike - seems correct!
After filling it up, the needle went nicely all the way right to indicate full.
I set the distance counter to zero, let's see where the needle will be when it's time to hit reserve.
Bit by bit, addressing a few small things the bike is still improving. It starts like a Swiss watch, and I enjoy riding it very much. Without a question, it is one of my favorite motorcycles. It is heavy, but I find it very easy to ride and maneuver. Lots of power in any gear! It is also very comfortable. What can I say - I love it!