Camshaft; Camshaft Cam Wear; Camshaft Journal Wear - Suzuki DR350 Service Manual

CAMSHAFT
The camshaft should be checked for runout and also for wear
of cams and journals if the engine has been noted to produce
abnormal noise or vibration or to lack ou tput power. Any
of these malconditions could be caused by a worn camshaft .
CAMSHAFT CAM WEAR
Worn-down cams are often the ca u se of mi stimed valve
operation resulting in reduced output power. The limit of cam
wear is specified for both intake and exhaust cams in terms
of cam height
8>.
which is to be measured with a microme-
ter. Replace the camshaft if found it worn down to the limit.
Cam height
Height
<El l
Service Limit
Intake cam
33.13 mm 11.3043 in)
Exhaust cam
33.16 mm 11 .3055 in)
09900· 20202 : Mic rometr (25 - 50 rnm)
CAMSHAFT JOURNAL WEAR
Determine whether each journal is worn down to the limit
or not by measuring camshaft journal oi l clearance with the
camshaft installed . Use plastigauge to read the c learance ,
which is specified as follows.
Camshaft journal oil clearance
Service Limit : 0 .150 mm (O .0059 in)
• Tighten the cylinder head cover bolts evenly and diagonal-
ly to the specified torque .
Tightening torque :
8 - 12
N'm
10 .8 - 1 .2 kg ·m. 6 .0 - 8 .5 Ib·lt)
09900 -22301 :
Plastigauge
If the camshaft journal oil clearance measured exceeds the
limit, measure the ou tside diameter of camsh aft. Replace
ei ther the cylinder he ad set or the camshaft if the clearance
is incorrect .
Cam shaft journal 0 .0 .
Standard
Right side
21 .959 - 21.980 mm 10.8645 - 0 .8654 in)
I Left side 17 .466 - 17.484 mm 10.6876 - 0 .6883 in)
09900-20205 : Mic rometer 10 - 25 mm)
Inlet opon
(B. T .D.CI
-
Inlol do h
(A.B.O.C.1
Val ve lIming
diagram
NOTE:
T. O.C
B. O.C.
o
ENGINE 3-22
Elfhausl close
IA. T .D.C.'
Exhaus t open
!B.B.O.C.I
To properly measure the oil clearance
with plastigauge. all gasket material
must be ramoved from fitting surfaces
of cylinder head and cover. Do not ap-
ply SUZUKI BONO No. 120781 1215
until after the oil clearance has been
determined.