MOTO GUZZI CALIFORNIA JACKAL Werkstatt-Handbuch Seite 339

A
B
C
D
E
F
G
H
I
Intake
L
Exhaust
M
INTAKE
VALVE
N
VENTIL
EINLASS
KLEP
O
AANZUIGING
P
24
DATA TABLE FOR VALVE AND GUIDE COUPLINGS
Ø valves' internal guide
mm
8,000÷8,022
C
HECK OF HEAD COMPONENTS
H
EADS
Check that:
• The contact surfaces for the cover and cylinder are
not grooved or damaged so as to jeopardize a perfect
packing;
• The tolarance between the holes for the valve guides
and the valve stems are within the prescribed limits;
• Check the condition of the valve seats;
Valve guides
Use a punch to exctract the valve guides from the heads.
The valve guides must be replaced only in the event that
the backlash between them and the stem cannot be
eliminated by replacing the valves only.
To fit the valve guides on the head, proceed as described
below:
• Warm up the head in a furnace at ca. 60°C;
• Lubricate the valve guides;
• Fit the flexible rings;
• Press the valve guides using a punch;
• True the holes where the valve stems slide using a
reamer, thereby bringing the inside Ø to the
prescribed size; interference between the head seat
and the valve guide must be mm 0,046÷0,075.
Ø valve rod mm
7,972÷7,987
7,965÷7,980
E
Assembly play mm
0,013÷0,050
0,020÷0,057
EXHAUST
VALVE
VENTIL
AUSLASS
KLEP
AFVOER
NGINE