Depending on your weight, you might need a different coil spring in the fork to suit your weight range.

Page 12 shows the different springs:
https://sram-cdn-pull-zone-gsdesign....lish_rev_d.pdf

Part numbers are in the Spare Parts Catalog:
https://sram-cdn-pull-zone-gsdesign...._spc_rev_b.pdf

The service manual shows coil spring removal and installation:
https://sram-cdn-pull-zone-gsdesign...._c_english.pdf