Nogo wrote in post #19522324
Speaking of working on carbs, a friend of mine showed me a neat device he uses to set the two carburetors on his MG. Simple but effective. First one pulls a spark plug out and places this special "spark plug" in its place. The diagnostic plug had glass sides. When the car is running, you can watch the color of the fire in the cylinder by looking through that thing. When the color of the fire is the cylinder was correct, the carb was set. You just did one carb and then do the other one. No need to try to balance the two carbs. You just set one at a time.
That was even easier than my old method. (I might not should mention this. . .) but my never fail, secret method was called "Dad, I need a hand. . ."

Rich friend.
I use to work in a gas station as a mechanic as a youngster. Very low budget place run by three brothers (J-3 Texaco, Jimmy, Johnny, and Jesse). They were three good ol' boys from Alabama that invested in the station and were barely making it. Anyway, they showed me a method that I have used several times when I needed to sync my Honda 750K. Very primitive, but dirt cheap and totally effective. It used 2 bottles with rubber caps. Clear beer bottles work great. The bottles were attached by a piece of tubing and there were two open tubes that you attached to the carbs. You poured a bit of brake fluid in each bottle, seal it up, suck on one tube that connects to the carb until the tube connecting the bottles fills with fluid. Let them equalize for a bit until the fluid level in each bottle is the same. Then attach the open tube to your two carbs and watch the fluid level. If it starts to rise in one and drop in the other, adjust the carbs until the fluid level stays even. Once done, move the tube to the next carb and do the same. Couple minutes your carbs are synced. Worked great.