Suzuki FD 110 XCS Service Manual page 60

VALVE STEM END CONDITION
Inspect the valve stem end face for pitting and wear. If pitting or
wear of the stem end face are present, the valve stem end may
be resurfaced, providing that the length 1 will not be reduced to
less than 2 mm. If this length becomes less than 2.4 mm, the
valve must be replaced. After installing a valve whose stem end
has been ground off as above, check to ensure that the face 2
of the valve stem end is above the cotters 3.
VALVE SPRING
Check the springs for strength by measuring their free lengths
and also the force required to compress them. If the limit indi-
cated below is exceeded by the free length reading or if the
measured force does not fail within the range specified, replace
both the inner and outer springs as a set.
Valve spring free length
Service Limit: 30.09 mm.
09900-20201: Venire calipers
Valve spring tension Standard: 147 nm. HEIGHT 25.80 mm.
VALVE AND VALVE SPRING REASSEMBLY
• Insert the valves, with their stems coated with (SUZUKI
MOLY PASTE) all around and along the full stem length with-
out any break. Similarly oil the lip of the stem seal.
99000-25140: SUZUKI MOLY PASTE
When inserting each valve, take care not to damage the lip
of the stem seal.
• Install the valve springs, making sure that the close pitch end
1 of each spring goes in first to rest on the head. The coil
pitch of both inner and outer springs very: the pitch decreases
from top to bottom, as shown in the illustration.
ENGINE 3-25
N
MM.
TOWARDS
HEAD