Prokomon Motorcycle Carburetor Synchronizer Tool Kit; Carb Synchronizer Tool with 4 Gauge and Plastic Case; Vacuum Carb Sync Tool for 2 Cylinder or 4 Cylinder

Lacks instructions, easy to figure out.

Very easy to use. May have to zero out gushes prior to use, and be careful not to lose small pressure adjusters, as they will screw all the way out. But all in all, great product

Provides accurate readings, but needs to be calibrated before every use.

Great Tool for the Price

Item did not work at all, even after calibration check, definitely disappointed

For the price and speed of delivery it is worth it and they work just as they should, used on a Yamaha 50hp outboard.

I zeroed the needles before using and it seemed to work ok on my Honda Hawk II.The nylon bleeder valves are unusable.They leak through the threads which messes up the readings.If I keep the gage set I'll have to buy better valves.

My old car has dual carbs and has not been running well lately and have not been able to determine why. I rebuilt carbs, checked compression, adjusted timing and yet just not right.Well I decided it would be a good idea to check the vacuum. Since I have more than one carb I needed more than one gauge which led me to search and find this nice set.It comes in a metal box. Also the frame that holds the gauges is made of metal too!!!The kit comes with 4 hoses, shut off T,s, and I guess adapters for motorcycle carbs.I was able to hookup this tool and read vacuum.I was bummed to find that my vacuum on the right side has the needle fluctuating widely by 10 inches so I immediately knew the problem is on the right side of the engine and now I will need to check the valves to see if one is too tight. If that is good then I have a bad valve or seat. So yes I am glad I finally know where to go from here.Not fun but needed to know.All in all this gauge set is great for diagnosing problems or just to sync up your carbs.Hope this helps and thanks..