Before I bought a Morgan Carbtune, I thought I would try my hand at manking a manometer seeing how it would cost less and I wouldnt have to wait for shipping. I made the carb adapter pieces with 3/16" brass barb splicers that I cut one side off and tapped it to 5mm threads and put a small o-ring on. Total cost to make these pieces was $11.65 at Home Depot. I then bought 40 ft of 3/16 tubing at 19cents/ft and two 1/4" (they didn't have 3/16") plastic T barb splicers. I cut the tubing into four 10ft sections and connected the ends with the plastic splicers. I then mounted the tubes on a 2x4 and hung it on the wall. I then put motor oil in the tube system by plugging 2 of the ends, putting the third in a bottle of oil, and suckig on the fourth. After some blowing and sucking and waiting, I got all the air bubbles out. To combat the boucing of the oil in each tube while the engine was running, I took 4 plastic tubes that fit in the tubing and melted over the ends to close them off. I then heated it again while trying to force a peice of wire through until it popped through to make a small hole. I put these in the tubes but cutting off the last 6" of each tube and using the plastic tubes to splice them back together together. I sealed it with electrical tape. Hooked it up and...absolutely rock steady oil levels that moved quickly and accurately while I adjusted the carbs. Absolutely perfect. I cant imagine a better result from any $100 carb sync. The bike runs a heck of a lot smoother now. I just had to post these results as I am so happy with the way it turned out and performed and how well the bike runs now. Total cost for the whole projects was about $20-$22. I highly suggest trying this is you want to sync your carbs and want the satisfaction of building it yourself. I cannot take all the credit as some of the methods for making the carb adapters and tube restrictors have been posted here before
I will get a pic later when I am done drinking this beer.