Yamaha XC125 Service Manual page 160

APPX SPECIFICATIONS
Model XC125S
Guide Inside Diameter/< Limit >: IN. 5.000 _ 5.012 mm (0.1969 _ 0.1973 in)/
< 5.03 mm (0.1980 in) >
EX. 5.000 "_ 5.012 mm (0.1969 _ 0.1973 in)/
< 5.03 mm (0.1980 in) >
Stem-to-guide Clearance/< Limit >: IN. 0.010"- 0.037 mm (0.0004 _ 0.0015 in)/
< 0.08 mm (0.0031 in) >
EX. 0.025 "" 0.052 mm (0.0010 _ 0.0020 in)/
< 0.10 mm (0.0039 in) >
Stem Runout Limit: 0.02 mm (0.0008 in)
//11 I]-2_
Valve Spring:
Free Length/Limit IN. 28.63 mm (1.127 in)/25.4 mm (1.00 in)
EX. 28.63 mm (1.127 in)/25.4 mm (1.00 in)
Compressed Length (Valve Closed) IN. 24.9 mm (0.98 in)
EX. 24.9 mm (0.98 in)
Spring Rate IN. 25.8 N/mm (2.62 kg/mm, 147 Ib/in)
-- "X- EX. 25.8 N/mm (2.62 kg/mm, 147 Ib/in)
Tilt Limit=X': IN. & EX. 2.5 ° or 1.2 mm (0.047 in)
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Direction of Winding (Top view) IN EX
Piston :
Piston Size "D"/ _ 48.945 _" 48.985 mm (1.927 _ 1.929 in)/
Measuring Point "H" _ 5 mm (0.2 in)
H (From bottom line of piston skirt)
Piston Clearance D 0.020 "_ 0.040 mm 10.0008 _ 0.0016 in)
Oversize: 2nd 49.50 mm (1.949 in)
4th 50.00 mm (1.989 in)
I
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