This kit is supplied with a cylinder leakage tester, three adapter hoses (10mm, 12mm, 14mm) and carrying case. Meanwhile, a leak down tester gives you a more comprehensive diagnosis, including whether the piston rings. It works by introducing compressed air (from your compressor) into an engine cylinder (usually at top dead center with both valves closed) and then measuring how much of that air leaks out
Motion Pro Digital 4-Stroke Leak Down Tester - Sportbike Track Gear
The motion pro leak down tester checks possible air leaks through seals or gaskets on engines
A compression tester tells you if the cylinder is sealing properly, but not much else
