Suzuki GSF650S - Camshaft and Cylinder Head Service

3-26 ENGINE
ENGINE COMPONENTS INSPECTION AND SERVICE
CAMSHAFT/CYLINDER HEAD INSPECTION
AND SERVICE
$
CAMSHAFTS
If the engine produces abnormal noises, vibration or lacks
power, a camshaft may be distorted or worn to the service limit.
The camshaft runout should be checked. Also, check the cams
and journals for wear or damage.
The exhaust camshaft has the embossed letters “EX” and the
intake camshaft has the embossed letters “IN”.
CAM WEAR
Worn-down cams are often the cause of mistimed valve opera-
tion resulting in reduced power output.
Measure the cam height

H using the micrometer. Replace a
camshaft if the cams are worn to the service limit.
) 09900-20202: Micrometer (25 – 50 mm)
( Cam height

H
Service Limit: (IN) 32.30 mm
(EX) 32.35 mm
CAMSHAFT JOURNAL WEAR
Determine whether or not each journal is worn down to the limit
by measuring the oil clearance with the camshaft installed in
place. Measure the clearance using the plastigauge

1.
) 09900-22301: Plastigauge
09900-22302: Plastigauge
( Camshaft journal oil clearance (IN & EX)
Service Limit: 0.15 mm
NOTE:
Install each camshaft journal holder to its original position.
(!3-81)
Identify the position of each removed part. Organize
the parts in their respective groups (i.e., intake,
exhaust, #1 or #2) so that they can be installed in their
original locations.