For 3-speed models with manual transmission.
Parts are illustrated in picture two with numbers: 2, 7, 8, 9, 10 & 15.
Parts correspond to original numbers:
0234 056 100 Gear drive 31T
0247 020 000 Ring 29x32x7
0234 058 100 Gear drive 23T
0234 057 200 Gear drive 21T
0285 106 004 Output shaft 24T
0290 022 100 Intermediate shaft 15T
Product fits
Sachs
50/3 L (S) (fan)
50/3 MA (I, NL, SF, X) MB (pedals)
50/3 MK (X), MAK (SF), MKA (I) (kick)