Beta RR 4T-400 Workshop Manual page 162

Installation
NOTE: Fins 37 and piston 36 determine the rebound damping
action. If necessary, the behaviour of the fork during the rebound
phase can be altered by replacing fins 37 and piston 36 with oth-
er parts having different characteristics.
Only use genuine Betamotor fins and pistons. Do not
modify the components.
– If necessary replace piston ring 35.
– Fit in succession spring 33, fin 34, piston 36 complete with
ring 35, rebound adjusting fin or fins 37 in the rod end.
The piston should be oriented so that the smaller holes
face adjusting fins 37.
– Manually screw in nut 38.
– Clamp the milled part of damping rod 32 in a vice.
– Using a suitable spanner (12-mm or 13-mm based on the nut
used), tighten nut 38 to the prescribed torque (see table in
Chapter 3 Tightening torques - Specifications - Recommend-
ed products).
Overhauling the foot valve (compression damping)
Removal
– Clamp in a vice the foot screw through spanner slot 47.
– Unscrew nut 42 with a 13-mm spanner.
– Remove in succession nut 42, spring 33, fin 43, piston 45
complete with O-ring 44, compression adjusting reed or reeds
46.
12
35
32
38
42
47
42
33
44
43
45
46
Workshop manual RR 4T - 400 - 450 - 525
37
36
34
33