Automatic Clutch Inspection - HYOSUNG WOW90 Service Manual

3-17 ENGINE
◉ 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 vehicle is equipped with an automatic clutch and
variable ratio belt drive transmission. The engagement
of the clutch is governed by engine RPMs and centrifu-
gal 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.
◉ CLUTCH-IN INSPECTION
Warm the engine to normal operating temperature.
Connect an engine tachometer to the engine.
Seated on the vehicle with the vehicle on level ground,
increase the engine RPMs slowly and note the RPM at
which the vehicle begins to move forward.
Standard
Clutch-in RPM
Tolerance
Engine tachometer : 09900-26006
◉ CLUTCH TIGHT INSPECTION
Grip the front brake lever and depress rear brake pedal
fully, and measure the engine RPM when open the
throttle.
Warm the engine to normal operating temperatures.
Connect an engine tachometer to the engine.
Apply the rear brake as firm as possible.
Briefly open the throttle fully and note the maximum
engine RPMs sustained during the test cycle.
Service limit
16.040mm (0.632 in)
3,900 rpm
±200 rpm