HER CHEE 2002 ATV-320 S, Service Manual

Page: 23 / 125

Chapter 1 Engine, Transmission & Gear
I-14
VALVE SPRING FREE LENGTH
Measure the free length of the inner and outer
valve springs.
Service Limit:
Inner (IN, EX): 27.5 mm (1.08 in)
Outer (IN, EX): 30.4 mm ( 1.20 in)
VALVE STEM
Inspect each valve for bending, burning, or
abnormal stem wear.
Check valve movement in the guide and
measure and record each valve stem O.D.
Service Limit:
IN: 4.9 mm (0.193 in)
EX: 4.9 mm (0.193 in)
VALVE GUIDE
NOTE
。
Remove the guides to remove any carbon
build-up before checking clearance.
Measure and record each valve guide I.D. using
a ball gauge or inside micrometer.
Service Limit: 5.03 mm (0.198 in)
Subtract each valve stem O.D. from the
corresponding guide I.D. to obtain the
stem-to-guide clearance.
Service Limit:
IN: 0.08 mm (0.003 in)
EX: 0.10 mm (0.004 in)