Suzuki DF200 - Page 20

GENERAL INFORMATION 1-15
VALVE/VALVE GUIDE
Item Unit
Data
DF200T/Z DF225T/Z DF250T/Z
Valve diameter IN mm (in.) 35.9 (1.4)
EX mm (in.) 31.4 (1.2)
Tappet clearance
(Cold engine condition)
IN STD mm (in.) 0.23 – 0.27 (0.009 – 0.011)
EX STD mm (in.) 0.33 – 0.37 (0.013 – 0.015)
Valve seat angle IN — 15°, 45°, 60°
EX — 15°, 45°, 60°
Valve guide to valve
stem clearance
IN
STD mm (in.) 0.020 – 0.047 (0.0008 – 0.0019)
Limit mm (in.) 0.070 (0.0028)
EX
STD mm (in.) 0.045 – 0.072 (0.0018 – 0.0028)
Limit mm (in.) 0.090 (0.0035)
Valve guide inside
diameter
IN,
EX
STD mm (in.) 5.500 – 5.512 (0.2165 – 0.2170)
Valve guide protrusion IN,
EX
STD mm (in.) 11.4 – 11.8 (0.45 – 0.46)
Valve stem outside
diameter
IN STD mm (in.) 5.465 – 5.480 (0.2152 – 0.2157)
EX STD mm (in.) 5.440 – 5.455 (0.2142 – 0.2148)
Valve stem deflection
IN Limit mm (in.) 0.14 (0.006)
EX Limit mm (in.) 0.18 (0.007)
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
STD mm (in.) 1.1 (0.04)
Limit mm (in.) 0.7 (0.03)
EX
STD mm (in.) 1.05 (0.04)
Limit mm (in.) 0.7 (0.03)
Valve seat contact
width
IN STD mm (in.) 1.1 – 1.3 (0.04 – 0.05)
EX STD mm (in.) 1.1 – 1.3 (0.04 – 0.05)
Valve spring free length STD mm (in.) 40.2 (1.58)
Limit mm (in.) 38.6 (1.52)
Valve spring tension STD N (kg, lbs) 147 – 173 (15.0 – 17.7, 33.1 – 39.0) for 31.1 mm (1.22 in)
Limit N (kg, lbs) 136 (13.9, 30.6) for 31.1 mm (1.22 in)
Valve spring squareness Limit mm (in.) 2.0 (0.08)
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