Suzuki DR650SE - Camshaft Inspection and Service

AUTOMATIC DE-COMP.
Move the automatic de-comp_ weight by hand to inspect
if operating smoothly.
If it does not smoothly must be replaced with a new cam-
shaft/automatic de-compo assembly.
CAMSHAFT
The camshaft should be checked for run out and also for wear
of cams and journals if the engine has been noted to produce
abnormal noise or vibration or to lack output power. Any
of these mal conditions could be caused by a worn camshaft.
CAMSHAFT CAM WEAR
Worn-down cams are often the cause of mistimed valve
operation resulting in reduced output power.
The limit of cam wear is specified for both intake and ex-
haust cams in terms of cam height 6), which is to be meas-
ured with micrometer.
Replace the camshaft if found it worn down to the limit .
• fcFob 09900-20202: Micrometer (25-50 mm)
Cam height 6)
Intake cam : 33.410 mm (1.3154 in)
Service Limit
Exhaust cam: 33.400 mm (1.3150 in)
CAMSHAFT JOURNAL WEAR
Determine whether each journal is worn down to the limit
or not by measuring camshaft journal oil clearance with the
camshaft installed. Use plastigauge to read the clearance,
which is specified as follows:
Camshaft journal oil clearance
Service Limit: 0.150 mm (0.0059 in)
• Tighten the cylinder head cover bolts evenly and diagonal-
ly to the specified torque.
~ Cylinder head cover bolt: 10 N'm (1.0 kg-m, 7.0 Ib-ft)
lim 09900-22301: Plastigauge
NOTE:
To
properly measure the oil clearance with plasti-gauge, all
gasket material must be removed from fitting surfaces of
cylinder head and cover. Do not apply SUZUKI BOND
No. 1207B until after the oil clearance has been determined.
ENGINE 3-26