Crankshaft; Automatic Clutch Inspection - HYOSUNG Prima Service Manual

3-15 ENGINE

CRANKSHAFT

CRANKSHAFT RUNOUT
Support crankshaft by " V " blocks, with the dial gauge
rigged to read the runout as shown.
Crankshaft runout
Excessive crankshaft runout is often responsible for
abnormal engine vibration. Such vibration shortens
engine life.
V - block(100 mm) : 09900 - 21304
Magnetic stand : 09900 - 20701
Dial gauge(1/100 mm) : 09900 - 20606
WEAR AND CLEARANCE OF CONROD BIG END
Turn the crankshaft with the conrod to feel the smooth-
ness of rotary motion in the big end. Move the rod up
and down while holding the crankshaft rigidly to be sure
that there is no rattle in the big end.
Wear on the big end of the conrod can be estimated by
checking the movement of the small end of the rod. This
method can also check the extent of wear on the parts
of the conrod's big end.
If wear exceeds the limit, conrod, crank pin and crank
pin bearing should all be replaced.
Conrod big end runout
CONROD SMALL END BORE I.D.
Measure the conrod small end diameter with a caliper
gauge.
Conrod small end bore I.D.
Dial calipers : 09900 - 20605

AUTOMATIC CLUTCH INSPECTION

This motorcycle is equipped with an automatic clutch
and variable ratio belt drive transmission. The engage-
ment of the clutch is governed by engine RPMs and
centrifugal mechanism located in the clutch.
To insure proper performance and longevity of the
clutch assembly it is essential that the clutch engages
smoothly and gradually. Two inspection checks must be
performed to thoroughly check the operation of the driv-
etrain. Follow the procedures listed.
Service limit 0.08 mm
Service limit 3.0 mm
Service limit 14.047 mm