Husqvarna TC 250 2010 Workshop Manual page 188

ENGINE REASSEMBLY
Insert the selector drum (6) into its seat.
Install the fork shafts (7) and (8) and make sure the forks move freely.
Make sure the fork bushings (5) are correctly located in the drum grooves (6).
Insert the circlip (9) of the input shaft fork shaft.
Rotate the selector drum to test operation.
H.26 Part. N. 8000 H1489 (10-2009)