Beta RR 4T - 250, Workshop Manual

Page: 163 / 196

13
8 - Front suspension / wheel
Release 01 Date 09/2007
33
45
46
43
44
Installation
NOTE: Fins 46 and piston 45 determine the compression damp-
ing. If necessary, the behaviour of the fork during the compres-
sion phase can be altered by replacing fins
46 and piston 45
with other parts having different characteristics.
Only use genuine Betamotor fins and pistons. Do not
modify the components.
– If necessary replace piston O-ring 44 .
– Insert in succession compression fin or fin stack 46 , piston 45
complete with O-ring 44 , fin 43 and spring 33 in the foot valve.
The piston should be oriented so that the smaller holes
face adjusting fins
45 .
– Manually screw in nut 42 .
– Clamp in a vice the foot screw through spanner slot 47 .
– Using a 13-mm spanner, tighten nut 42 to the prescribed
torque (see table in Chapter 3
Tightening torques - Specifica-
tions - Recommended products
).
42
47
Reassembling the fork leg and the sheath - Fitting the seal
rings
Never reuse any removed seal rings and wiper seals. Be-
fore reassembly, check the condition of the guide bush-
es. If they are scored or scratched, replace them. Ensure
that the Teflon lining of the guide bushes is intact.
– Cover the seat of the upper bush by applying adhesive tape to
the end of the fork leg.
– Apply a thin film of grease to the wiper seal and the seal ring.
– Insert the following parts in succession into the fork leg: wiper
seal 12 , retaining ring 11 , seal ring 10 , cup 9 and lower guide
bush 8 .
Pay attention to the orientation of seal ring 10: fit it so that
its hollow side faces cup
9 .
8
9
10
11
12
08_Inghilterra_059311 27-12-2007 18:49 Pagina 13