Yamaha YX600S Service Manual page 86

1~G1~1_1_N_s_PE_C_T_1o_N_A_N_D_R_E_P_A_l_R
________ _
3-29
20 mm
-tt--~
(0.8 in)
307-027
Piston Ring
1. Measure:
•Ring side clearance
Use a feeler gauge.
Out of
specification~Replace
piston.
NOTE:
~~~~~~~~~~~~~
Clean carbon from piston ring grooves and rings
before measuring side clearance.
Piston Ring Side Clearance:
Top
2nd
2. Position:
•Piston ring
(in cylinder)
0.03-0.07 mm
(0.0012-0.0028 in)
0.02-0.06 mm
(0.0008-0.0024 in)
NOTE:
~~~~~~~~~~~~~-
Insert a ring into cylinder, and push it approxi-
mately 20 mm (0.8 in) into cylinder. Push ring with
piston crown so that ring will be at a right angle
to cylinder bore.
3. Measure:
•Ring end gap
Out of specification~ Replace.
NOTE:
~~~~~~~~~~~~~-
You cannot measure end gap on expander spacer
of oil control ring. If oil control ring rails show ex-
cessive gap, replace all three rings.
~
Standard Limit
Top ring
0.15-0.30 mm
0.70 mm
(0.0059-0.0118 in)
(0.0276 in)
2nd ring
0.15-0.30 mm
0.70 mm
(0.0059-0.0118 in) (0.0276 in)
Oil control 0.2-0.7 mm
(Rails)
(0.008- 0.028 in)
-