The spring part should be facing upwards. We usually mount it with the help of a welding rod, then it is possible to hold it without scratching anything. There are of course many ways to do it, this is one.
See the picture.
Puch original number: 128.2410
Zündapp original number: 517-21.109
Grip length = 113,5mm
Total length = 118,5mm
The product fits
Puch
M50
Maxi
VZ50
Zündapp
441 C50 Super (266/278, 3-speed)
517 C/CS50/GS/GT50 (278, 3-speed) (NL) 517 GTS50 (278, 3-speed) (NL)) (NL)
517 GTS50 (280, 4-speed) (DE)
517 KS50 (278, 3-speed) (SE)
517 KS50 (284, 5-speed) (DE)
517 KS50/GTS50 (280, 4-speed) (NL)
518 KS100 (282/286)
529 CS50 (278, 3-speed) (NL) 529 GTS50 (278, 3-speed) (SE)) (NL)
529 GTS50 (280, 4-speed) (DE)
529 GTS50 (284, 5-speed) (DE)
529 KS50 (278, 3-speed) (SE)
529 KS50/GTS50 (280, 4-speed) (NL)
530 KS50/KS80 (284/314, 5-speed)