This page will explain a few of the terms commonly associated with the front end geometry of a kart.
Please note: these drawings are not absolutely precise, and the numbers indicated here are not necessarily where your geometry is set. These are only simple illustrations to show the relative angles, and the terms that relate to each.
As you can see in the accompanying illustration, I've shown a rear and side view of a front spindle and wheel.The view of the side of the wheel/tire would be a right front, and as if the wheel was "see-through", allowing you to see the front spindle.
This particular illustration is of a front end with 15° caster, and 8° kingpin inclination.
To put it simply, caster is the amount that the top of the kingpin tips towards the rear of the kart, and kingpin inclination is the amount that the top of the kingpin tips towards the center of the kart.
Camber is the amount that the wheel/tire is tipped... either towards the center of the kart (negative camber, as in the upper illustration), or towards the outside (positive camber, very unusual)... or no camber, as in the lower illustration.
Please notice that the kingpin inclination is not necessarily related to camber, however... on newer karts with "pill" adjusters in the front end, camber (or caster) adjustment via the "pill" actually does change the kingpin angle. (ie: changing camber also changes the kingpin inclination).
Also note that many spindles have the kingpin inclination marked on the spindle somewhere. Obviously, if you have a spindle that is manufactured with 8° inclination, but the actual kingpin angle in the chassis is tipped 10° (top towards center of the kart), you will in reality have 10° kingpin inclination, and 2° negative camber when assembled.