Your correct on top spring mate, long one between the washer and diaphragm cap.
The jet is the brass screw that holds the float chamber cap onto the carb body. You may notice rings on the face of it, these correspond to it's flow rating. VEX60 have 3 rings. VE40/50 have 1 ring.
See my first post for correct bits for the vex60 and ve40, as far as i'm aware there is no purple mate, blue, red, yellow, clear. VEX60 should have a yellow, VE40/50 have red.
