Suzuki DR-Z400S 2001 Service Manual page 73

3-30 ENGINE
REASSEMBLY
Install each valve spring seat.
Apply molybdenum oil solution to each oil seal and press-fit
them into position.
Do not reuse the oil seals.
Apply molybdenum oil solution to the valve as shown, and
then insert them into the valve guides.
When inserting each valve into the valve guides, make
sure not to damage the lip of the oil seal.
Install the valve spring with the smaller pitch A facing the
cylinder head.
B Larger pitch
C Down
Install the valve spring retainer by pressing down the spring
using the valve lifter. Fit the cotter halves to the stem end and
release the lifter to allow the cotter 1 to wedge between the
retainer and the valve stem. Make sure that the rounded lip 2
of the cotter fits snugly into the groove 3 in the stem end.
09916-14510: Valve spring compressor
09916-14910: Attachment
09916-84511: Tweezers
Be sure to install all of the parts in their original posi-
tions.