Yamaha XC125 Service Manual page 164

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Chassis
Model XC 125S
Steering System:
Steeing Bearing Type Ball Bearing
No./Size of Steel Balls:
Upper 22 pcs/3/16 in
Lower 19 pcs/1/4 in
Front Suspension:
Front Fork Travel 60 mm (2.36 in)
Fork Spring Free Length 196.5 mm (7.74 in)
< Limit> < 195 mm (7.68 in)>
Spring Rate/Stroke: K1 = 10.23 N/ram (1.043 kg/mm, 58.34 Ib/in)/
0 _ 46 mm (0 _ 1.8 in)
K2 = 16.89 N/mm (1.722 kg/mm, 96.40 Ib/in)/
46 _ 64 mm (1.8 _ 2.5 in)
OptiDnal Spring No.
Rear Suspension:
Shock Absorber Travel 75 mm (2.95 in)
Spring Free Length 245.1 mm (9.65 in)
< Limit> < 243.6 mm 9.59 in) >
Fitting Length 235.1 mm (9.26 in)
Spring Rate/Stroke K1 = 9.92 N/mm (1.011 kg/mm, 56.60 Ib/in)/
0 _ 47.5 mm (0 _ 1.87 in)
K2 = 18.31 N/mm (1.867 kg/mm, 104.51 Ib/in)/
47.5 _ 70 mm (1.87 "" 2.76 in)
K3 = 42.49 N/mm (4.333 kg/mm, 242,56 Ib/in)/
70 _ 85 mm (2.76 _ 3.35 in)
Optional Spring No.
Wheel:
Front Wheel Type Cast Wheel
Rear Wheel Type Cast Wheel
Front Rim Size/Material MT2.50 x 10/Aluminum
Rear Rim Size/Material MT2.50 x 10/Aluminum
Rim Runout Limit
Vertical < 2.0 mm (0.08 in) >
Lateral < 2.0 mm (0.08 in) >
Drum Brake:
Type Front Leading and Trailing
Rear Leading and Trailing
Drum Inside Diameter/< Limit>:
Front 130 mm (5.12 in)/
< 131 mm (5.16 in) >
Rear 130 mm (5.12 in)/
< 131 mm (5.16 in) >
Lining Thickness 4 mm (0.16 in)
< Limit > < 2 mm (0.08 in) >
Front 36.5 mm (1.44 in)
Shoe Spring Free Length:
__ Rear 36.5 mm (1.44 in)
7-9