Yamaha SR400 Owner's Manual page 88

Specifications
Front tire:
Type:
With tube
Size:
90/100-18M/C 54S
1
Manufacturer/model:
BRIDGESTONE/BT-45F
Rear tire:
2
Type:
With tube
Size:
3
110/90-18M/C 61S
Manufacturer/model:
BRIDGESTONE/BT-45R
Loading:
4
Maximum load:
150 kg (331 lb)
* (Total weight of rider, passenger, cargo
5
and accessories)
Tire air pressure (measured on cold
tires):
6
Up to 90 kg (198 lb) load:
Front:
175 kPa (1.75 kgf/cm
Rear:
7
200 kPa (2.00 kgf/cm
90 kg (198 lb) load - maximum load:
Front:
8
200 kPa (2.00 kgf/cm
Rear:
225 kPa (2.25 kgf/cm
Front wheel:
9
Wheel type:
Spoke wheel
Rim size:
10
18 x 1.85
Rear wheel:
Wheel type:
11
Spoke wheel
Rim size:
18 x 2.15
Front brake:
12
Type:
Hydraulic disc brake
Specified brake fluid:
13
DOT 4
Rear brake:
Type:
14
Mechanical leading trailing drum brake
2
, 25 psi)
2
, 29 psi)
2
, 29 psi)
2
, 33 psi)
8-2
Front suspension:
Type:
Telescopic fork
Spring:
Coil spring
Shock absorber:
Hydraulic damper
Wheel travel:
150 mm (5.9 in)
Rear suspension:
Type:
Swingarm
Spring:
Coil spring
Shock absorber:
Hydraulic damper
Wheel travel:
105 mm (4.1 in)
Electrical system:
System voltage:
12 V
Ignition system:
TCI
Charging system:
AC magneto
Battery:
Model:
GT4B-5
Voltage, capacity:
12 V, 2.5 Ah (10 HR)
Headlight:
Bulb type:
Halogen bulb
Bulb wattage  quantity:
Headlight:
H4, 60.0 W/55.0 W x 1
Brake/tail light:
21.0 W/5.0 W  1
Front turn signal light:
21.0 W  2
Rear turn signal light:
21.0 W  2
Auxiliary light:
4.0 W  1
Meter lighting:
1.7 W  4
Neutral indicator light:
1.7 W  1
High beam indicator light:
1.7 W  1