Blends are listed in percentage, PG is the first number, VG is the second (unless otherwise noted).
PG is the flavor carrier, and also provides throat-hit. Higher PG juice tend to have more flavor and more throat hit.
VG is the vapor producer (and very sweet). Higher VG juices produce more vapor and are very smooth.
Juices that are 80/20 will have more flavor, thinner, and less vapor
Juices that are 30/70 will have slightly muted flavor, better vapor, and may be too thick to wick in some tanks
The 60/40 juice you ordered will be just fine in your Kanger tank, because it is 60% PG and 40% VG... not thick, not a harsh throat-hit, and should have good flavor (depending on the juice manufacturer).
Yes, that is one of my bikes... '85 Shadow VT700, fully restored classic
My daily ride is an '02 Sabre, full-dress, and I also have a '99 CB750 NightHawk Tour. I've got a couple more on the plate to restore, but not until the weather gets better... Here's an older pic of my stable