Cylinder - HYOSUNG MS3 250 Sercie Manual

3-23 ENGINE
If the camshaft journal oil clearance exceeds the ser-
vice limit, measure the inside diameter of the
camshaft housing and outside diameter of the
camshaft journal. Replace the camshaft or the cylin-
der head and camshaft housing depending upon
which one exceeds the specification.
Camshaft housing I.D
IN.
EX.
Small bore gauge : 09900-22401
Cam-
shaft
O.D
IN.
21.959 ~ 21.980 mm
(0.8645 ~ 0.8654 in)
EX.
▣ ▣ CAMSHAFT RUNOUT
Support the valve using a V-blocks and measure the
camshaft runout using the dial gauge. If the runout
exceeds the service limit, replace the camshaft with a
new one.
Camshaft runout
(IN. & EX.)
Dial gauge : 09900-20606
Magnetic stand : 09900-20701
V-block : 09900-21304

CYLINDER

▣ ▣ CYLINDER DISTORTION
Check the gasketed surface of the cylinder for distor-
tion using a straightedge and thickness gauge, taking
a clearance reading at several places as indicated.
If the largest reading at any position of the straight-
edge exceeds the limit, replace the cylinder.
Cylinder distortion
Thickness gauge : 09900-20806
Standard
21.959 ~ 21.980 mm
(0.8645 ~ 0.8654 in)
Standard
21.959 ~ 21.980 mm
(0.8645 ~ 0.8654 in)
Service limit
0.10 mm (0.004 in)
Service limit
0.05 mm (0.002 in)