Suzuki DF 90 Service Manual page 260

9-6 LOWER UNIT
5. Remove clutch dog shifter 9 and connector pin 0 from
propeller shaft.
Disassembly of shift rod components
1. Remove circlip 1 and washer 2.
2. Slide shift rod 3 out of shift rod guide housing.
3. Remove detent ball 4 and spring 5.
4. Remove pin 7 and shifter yoke 8.