Synchronizing carbs

I understand you are suppose to use the special tool to sync the carbs. I don't see a problem with using my vacuum gauge. Now my question would be which intake to start with and how many inches am I looking for? I picked up 9in on the right carb and 4in on the left. I could not get any adjustment out of either carb. I have ordered new intake boots for both sides considering they both had dry rot and I did see a leak in the gaskets. Again just curious which side to start with first and a somewhat specific vacuum reading. Thanks in advance

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Well I suppose I should have added what my bike is. It is a 78 xs400.

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http://www.xs400.com/forum/showthread.php?t=6050&highlight=sync+carbsMake and use one of these. It will be much more accurate.

http://www.xs400.com/forum/showthread.php?t=5437&highlight=manometer Another good thread on this.

That looks like a pretty sweet clean and clear cut way to set them. Thsnk you very much. Now just to find some extra tubing!

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For the cost to make one it's the way to go.

you don't need to mount it to a board and make any stripes or calculations actually, it's even easier than this

If you just have a u-shape tube with some fluid, you attach each end to either carb boot and run the bike, you should turn the sync screw until the fluid in the u-shape is level and constant..

it's all relative