Book says:" Check reeds to insure they are not preloaded(sticking tightly to reed block) and not standing open more than 0.2mm (0.008 in).
The reed stop gap for the 9.9 standard is 2.9-3.1mm (0.114-0.122 in)
The reed stop gap for the 9.9 CDI is 1.2-1.4mm (0.047-0.055 in)
The reed stop gap for the 15 is 3.9-4.1mm (0.154-0.161)