Tightening Torque - Yamaha BR250F Service Manual

E. Electrical
Ignition system:
Type flywheel magneto (C.D.I. type)
Model/man ufactu rer
F8R4/YAMAHA
Voltage 12V
Pluser coil resistance 20n ± 10% at 20°C (68°F) (White/Red - Black)
Charging coil resistance 426n ± 10% at 20°C (68°F) (Brown - Black)
Ignition timing:
B.T.D.C.
1.6 ± 0.1 mm (0.063 ± 0.004 in)
Ignition coil:
Model: Manufacturer
F6T411/MITSUBISHI
Spark gap
9 mm (0.4 in)/300 r/min
11 mm (0.6 in)/3,000 r/min
Primary winding resistance 1.0n ± 10% at 20°C (68°F)
Secondary winding resistance
5.9kn ± 20% at 20°C (68°F)
Diode (Yes or No)
No
Spark plug:
Type & quantity NGK BR8HS x 1 pes,
Spark plug gap
0.6"'-' 0.7 mm (0.024"'-' 0.028 in)
Spark plug cap:
Type
Resign type
Resistance
5kn ± 25% at 20°C (68°F)
C.D.I. unit:
Model/Manufacturer
8R4/YAMAHA
Lighting system:
Lighting output
12V-l00W
Lighting coil resistance 0.23n ± 20% at 20°C (68°F) (Yellow - Black)
Headlight type
Semi shield
Bulb wattage/q'ty 12V -60/60W x 1 pc.
Tail/stop light wattage
12V-8W/23W
A.C. regulator:
Model/manufacturer
TRIZ-50 HITACHI/S85168 TOSHIBA
Voltage 13.8 ± 0.5V
7-2 Tightening torque
,
Part to be tightened Thread size Tightening torque Remarks
[Engine]
Spark plug M14 P1.25 2.8 m-kg (20 ft-lb]
Cylinder M8 P1.25 First: 2.0 m-kg (14.5 ft-lb)
Final: 2.5 m-kg (18 ft-lb]
Flywheel magneto M16 P1.9 7.3 m-kg (53 ft-lb)
Crankcase upper and lower
M8
Pl.25 First: 1.0 rn-kq (7 ft-lb)
I
with engine bracket
I
Final: 2.5 m-kg (18 ft-lb)
Tightening sequence
1
71
0
3
5
0
0
0
-
1--,
0 0
8
0
~4
2
Fan
I
M6
PLO
I 0.7 m-kg (5.1 ft-lb) Use Loetite®
7-4