Suzuki DF2.5 Service Manual page 12

GENERAL INFORMATION 1-11
Item Unit
Data
DF2.5
VALVENALVE GUIDE
Valve diameter IN mm (in) 20.0 (0.79)
EX
mm (in) 18.0 (0.71)
Valve
clearance
JN
STD
mm (in) 0.13 - 0.17 (0.005 - 0.007)
(Cold engine
EX STD
mm (in) 0.13- 0.17 (0.005- 0.007)
condition)
Valve seat angle IN
-
45°
EX -
45°
Valve guide
IN
STD
mm (in) 0.010 - 0.037 (0.0004- 0.0015)
to valve stem
Limit mm (in) 0.075 (0.0030)
clearance STD
mm (in) 0.025 - 0.052 (0.001 0 - 0.0020)
EX
Limit mm (in) 0.090 (0.0035)
Valve guide
IN,
inside
EX
STD
mm (in) 4.000- 4.012 (0.1575- 0.1580)
diameter
Valve stem
IN
STD
mm (in) 3.975- 3.990 (0.1565- 0.1571)
outside
diameter
EX STD
mm (in) 3.960- 3.975 (0.1559 - 0.1565)
Valve stem IN,
Limit mm (in)
0.35 (0.014)
deflection
EX
Valve stem IN,
Limit mm (in) 0.05 (0.002)
run out
EX
Valve head
IN,
Limit mm (in) 0.08 (0.003)
radial runout
EX
Valve head IN,
Limit mm (in) 0.5 (0.02}
thickness
EX
Valve seat IN,
STD
mm (in) 0.8- 1.0 (0.03- 0.04)
contact width
EX
Valve spring free
STD
mm (in) 22.42 (0.883)
length
Limit mm (in)
21 .52 (0.847}
Valve spring tension
STD
N (kg, lbs)
36.5-41.9 (3.65- 4.19, 8.05- 9.24) for 15 mm (0.6 in)
Limit
N (kg, lbs)
33.3 (3.33, 7.34} for 15 mm (0.6 in)