Yamaha BR250F - Tightening Torque

E. Electrical
Ignition system:
Type
flywheel magneto (C.D.I. type)
Model/manufactu rer
F8R4/Y AMAHA
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