SPEC
L-20
DESCRIPTION
SPECIFICATION
Stem outside diameter
IN
4.975 ~ 4.990 mm
EX
4.960 ~ 4.975 mm
<Limit>
IN
<4.950 mm>
EX
<4.935 mm>
Guide inside diameter
IN
5.000 ~ 5.012 mm
EX
5.000 ~ 5.012 mm
<Limit>
IN
<5.035 mm>
EX
<5.035 mm>
Stem to guide clearance
IN
0.005 ~0.0325 mm
EX
0.0125 ~ 0.026 mm
<Limit>
IN
<0.075 mm>
EX
<0.075 mm>
Stem runout limit
0.010 mm
Valve seat width
IN
0.9 ~ 1.1 mm
EX
0.9 ~ 1.1 mm
<Limit>
IN
<1.6 mm>
EX
<1.6 mm>
Valve spring :
Free length
IN
39.62 mm
EX
39.62 mm
<Limit>
IN
38.17 mm
EX
38.17 mm
Set length (valve closed )
IN
25.6 mm
EX
25.6 mm
<Tilt limit>
IN
2.5°/1.7 mm
EX
2.5°/1.7 mm
Compression pressure (installed) IN
142-221 Nm (14.5-22.5 kgf)
EX
142-221 Nm (14.5-22.5 kgf)
Direction of winding (top view)
Clockwise
Crankshaft :
Crank width “A”
46.95 ~ 47.00 mm
<Runout limit “C”>
<0.03 mm>
Big end side clearance “D”
0.15 ~ 0.45 mm
<Small end free play limit “F”>
<0.8 mm>
Shifter :
Shifter type
Cam Drum and Guide bar
Kick starter :
Kick starter type
Kick and mesh type
Kick clip friction force
7.8 ~ 11.8 Nm (0.8 ~ 1.2 kgf)
2-6
MAINTENANCE SPECIFICATIONS
