Cylinder Head - HYOSUNG Prima Service Manual

MOVABLE DRIVEN SPRING
Measure the free length of the movable driven spring. If
the length is shorter than the service limit, replace the
spring with a new one.
Movable driven spring free length
MOVABLE DRIVEN FACE PIN AND OIL SEAL
Turn the movable driven faces and check to see that the
movable driven faces turn smoothly.
If not rotate smoothly, visually inspect the lip of oil seal,
movable driven face sliding surface and sliding pins for
wear or damage.
MOVABLE DRIVEN FACE
Inspect the V-belt contacting surface of both driven
faces for any scratches, wear and damage.
Replace the movable driven face with new one if there
are any abnormality.

CYLINDER HEAD

Decarbon the combustion chamber.
Check the gasketed surface of the cylinder head for dis-
tortion with a straightedge and thickness gauge, taking a
clearance reading at several places.
Thickness gauge : 09900 - 20806
Cylinder head distortion
Service limit 135~153 mm
Service limit 0.1 mm
ENGINE 3-18