Yamaha YTZ250S 1986 Service Manual page 135

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YTZ250S
Item
Cooling :
Radiator Core size
Width 110 mm (4 .33 in)
Height
200 mm (7.9 in)
Thickness 32 mm (1.26 in)
Radiator Cap Opening Pressure 93.1-12.3 kPa (0 .95-1.25 kg i cm
2
,
13.5-17.8 psi)
Coolant Capacity (Total)
1.0 L (0.88 Imp qt, 1.06 US qt)
Reservoir Tank Capacity 0.22 L (0 .194 Imp qt, 0.233 US qt)
<
From Low to Full Level > 0.16 L (0.141 Imp qt, 0.169 US qt)
Water Pump
Type Single-Suction Centrifugal Pump
Recution Ratio
18 / 24 (0 .75)
Tightening Torque Thread Size Nm m' kg ft ' lb
Spark plug M14x 1.25 25 2.5 18
Cylinder head -Nut M 8x 1.25 25 2.5 18
-Stud M8 13 1.3 9.4
Cylinder drain bolt M 6x 1.0 10 1.0
7
Cylinder -Nut M10x 1.25 35 3.5
25
-Stud M10x 1.25 13 1.3 10
Housing cover
-Flange bolt
M 6x 1.0 10
1.0 7
-Bolt
M 6x 1.0
12
1.2
9
Intake manifold M 6x 1.0 12 1.2 9
Crankcase M 6x 1.0 12 1.2 9
Crankcase cover
M 6x 1.0
12 1.2 9
Crankcase cover 1 M 6x 1.0 10 1.0 7
Bearing cover plate
M 6x 1.0 10
1.0 7
Holder M 8x 1.25 16 1.6 12
Plate M 6x 1.0 10 1.0 7
Oil drain bolt
M12x 1.5
20 2.0 14
Kickstarter lever M 8x 1.0 20 2.0
14
Primary drive gear
M18x 1.0 115 11.5 85
Clutch
M20x 1.0 75 7.5
54
Push rod 1 M 6x 1.0 10 1.0 7
Clutch spring M 6x 1.0
10 1.0 7
Drive sprocket M20x 1.0 75 7.5 54
Shift pedal M 6x 1.0 10 1.0 7
Stopper lever M 6x 1.0 15 1.5 11
Magneto rotor
M12x 1.25
80
8.0 58
Magneto backing plate
M 6x 1.0 8 0.8 6
Kick stater cover -Flange bolt M 6x 1.0
12 1.2
9
6-11