I have the newer Motion Pro sync tool. The other day I took it out to sync the carbs on my summer project bike. The last time I used the tool it was fine and only took 5 minutes. This time no matter what I tried it would instantly suck all the fluid out. The process was maddening. My wife saw that I was on the brink of a total melt down pulled out her phone and did several searches and discovered this was a common issue and the fluid needs to be replaced because it dries out and gets thicker causing all the issues that I was experiencing she then got on eBay and ordered up a Morgan Carbtune Pro and said it would arrive before the weekend. It showed up today so I went out to the garage and got the job done in just a few minutes. This tool is well worth the money. And my wife is awesome.