This guy made his own carberator synchronization ( carb sync ) gauge. Basically, it is a very large U tube. Looks easy and cheap to me, I might even have all the materials I need laying around.

http://www.powerchutes.com/manometer.asp

Check it out

Yeah, I made something similar when I did my XS400. Filled it with fork oil.

One thing to watch out for, if the carbs are far out, the oil can get sucked into one cylinder.

This guy made his own carberator synchronization ( carb sync ) gauge. Basically, it is a very large U tube. Looks easy and cheap to me, I might even have all the materials I need laying around.

http://www.powerchutes.com/manometer.asp

Check it out

i built one of these

but only realized once i tried to hook it up to the intake nipples

that the tubing i used was slightly too big =[

I sync mine using that method. I used ATF in the lines, it made it really stand out. IT took 5 minutes and $7.00 to amke but definately made a huge difference in performance. NOTE**** BE careful my setting were way off and I almost sucked the ATF into the engine. Be ready to pull them off quickly. Once you get the setting closer to perfect it will allow you to adjust on the fly until you get the setting right.

The 2 end hoses attach to the carb boot inlets?

Then how does the vacuum get to the petcock?

<<XS400SG w/ Mikuni

To keep the fuel going while balancing the carbs turn the fuel tap to the prime positon .Tony.

your supposed to take the fuel tank off (have to, to get to the intake) use a small container with a tube to the carb.

I built one as well, used ATF fluid (which btw won't do nothing to your engine if it gets sucked in there).

That's right, them be home-made "pods" in the above pick, haha. I'm bad, I'm nationwide.