Suzuki EN125-2A, Service Manual

Page: 46 / 208

ENGINE 3-14
NOTE:
Visually inspect each valve for wear of its
seating face. Replace any valve with an
abnormally worn face.
CYLINDER HEAD DISTORTION
Decarbon combustion chamber.
Check the gasketed surface of the cylinder head
for distortion with a straightedge and thickness
gauge, taking a clearance reading at several
places as indicated. If the largest reading at any
position of the straightedge exceeds the limit,
replace the cylinder head.
Service limit 0.05 mm
VALVE FACE WEAR
Measure the thickness and, if the thickness is
found to have been reduced to the limit, replace
the valve.
T
Service limit 0.5 mm
Support the valve with "V" blocks, as shown, and
check its runout with a dial gauge. The valve must
be replaced if the runout exceeds the limit.
VALVE STEM RUNOUT
Magnetic stand
Dial gauge (1/100 mm)
V-block (100 mm)
09900-20701
09900-20606
09900-21304
Service limit 0.05 mm
Place the dial gauge at right angles to the valve
head, and measure the valve head radial runout. If
it measures more than limit, replace the valve.
VALVE HEAD RADIAL RUNOUT
Service limit 0.03 mm