Beta RR 4T-250, Руководство по ремонту

Страница: 68 / 215

39
6 - Motore
Release 00 Date 02/2005
2
11
3
1
4
4
5
6
7
7
8
9
9
10
10
Cylinder head top
– Remove Seeger ring 1 and pull decompressor shaft 2 and
spring 3 out of the hole.
– Remove the two terminals 4 from the cylinder head top to-
gether with rocker arm pivots 5 and 6 . Remove rocker arms 7 .
– Clean all the components and check them for wear.
Rocker arm pins 5 and 6
The rocker arm pivots should show no signs of scoring and
should rotate freely in rocker arms
7 .
Rocker arm rollers 8
Check that the rocker arm rollers can slide freely. If any radial
play is found, replace the rocker arm.
Adjusting screws 9
The contact surfaces of the adjusting screws should be flat.
Decompressor shaft 2
Check the sliding of the decompressor shaft and its play in the
support hole.
Replace O-ring
11 .
Replacing O-rings 10.
– Before reassembly, carefully oil all the components.
– Position the rocker arms in the cylinder head top and then fit
the rocker arm pins.
Shorter rocker arm 6 is to be fitted at the back.
– Fit terminals 4 and turn them so as to allow the cylinder
head top screws to be fitted at a later stage.
– Fit decompressor shaft 2 and preload the spring.