Suzuki df2.5 - Page 150

DF2.5 “K8” (’08) MODEL 5
VALVE/VALVE GUIDE
Item Unit
Data
DF2.5
Valve diameter IN mm (in) 20.0 (0.79)
EX mm (in) 18.0 (0.71)
Valve
clearance
(Cold engine
condition)
IN STD mm (in) 0.13 – 0.17 (0.005 – 0.007)
EX STD mm (in) 0.13 – 0.17 (0.005 – 0.007)
Valve seat angle IN — 45°
EX — 45°
Valve guide
to valve stem
clearance
IN
STD mm (in) 0.010 – 0.037 (0.0004 – 0.0015)
Limit mm (in) 0.075 (0.0030)
EX
STD mm (in) 0.025 – 0.052 (0.0010 – 0.0020)
Limit mm (in) 0.090 (0.0035)
Valve guide
inside
diameter
IN,
EX
STD mm (in) 4.000 – 4.012 (0.1575 – 0.1580)
Valve stem
outside
diameter
IN STD mm (in) 3.975 – 3.990 (0.1565 – 0.1571)
EX STD mm (in) 3.960 – 3.975 (0.1559 – 0.1565)
Valve stem
deflection
IN,
EX
Limit mm (in) 0.35 (0.014)
Valve stem
runout
IN,
EX
Limit mm (in) 0.05 (0.002)
Valve head
radial runout
IN,
EX
Limit mm (in) 0.08 (0.003)
Valve head
thickness
IN,
EX
Limit mm (in) 0.5 (0.02)
Valve seat
contact width
IN,
EX
STD mm (in) 0.8 – 1.0 (0.03 – 0.04)
Valve spring free
length
STD mm (in) 22.42 (0.883)
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)