Beta RR 4T-250, Workshop Manual

Page: 72 / 215

43
6 - Motore
Release 00 Date 02/2005
– Press oil seals 1 out of seal holding bush 2 .
– Fit the new oil seals with the gaps facing outward, pressing
them in until they are flush. Carefully grease the sealing lips.
– Remove the two O-rings 3 from the seal holding bush and re-
move any residues with a wire brush.
– Fit two new O-rings.
– The seal holder can be removed from the cylinder head with
the aid of the two M3 threaded holes 4 without removing the
cylinder head top.
1
1
3
3
2
8
5
9
7
6
6
10
13
14
12
Preassembling the camshaft
– Apply Loctite 243 on the threads of the two screws 6 and fit
camshaft gear 7 . Tighten the screws to 28 N·m.
– Key ball bearing 5 with a socket punch.
– Fit decompressor shaft 8 and spring 9 . Preload the spring by
approximately 1/2 turn and insert the spring end into slot B .
Check if the decompressor shaft returns automatically to the
starting position. If that is not the case, increase the spring
preload.
2
1
4
9
B
8