Yamaha SR400 User Manual

Periodic maintenance and adjustment
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EAU21402
Valve clearance
The valve clearance changes with use,
resulting in improper air-fuel mixture
and/or engine noise. To prevent this
from occurring, the valve clearance
must be adjusted by a Yamaha dealer
at the intervals specified in the periodic
maintenance and lubrication chart.
EAU70280
Tires
Tires are the only contact between the
vehicle and the road. Safety in all con-
ditions of riding depends on a relatively
small area of road contact. Therefore, it
is essential to maintain the tires in good
condition at all times and replace them
at the appropriate time with the speci-
fied tires.
Tire air pressure
The tire air pressure should be checked
and, if necessary, adjusted before each
ride.
WARNING
EWA10504
Operation of this vehicle with im-
proper tire pressure may cause se-
vere injury or death from loss of
control.
 The tire air pressure must be
checked and adjusted on cold
tires (i.e., when the temperature
of the tires equals the ambient
temperature).
 The tire air pressure must be ad-
justed in accordance with the
riding speed and with the total
weight of rider, passenger, car-
go, and accessories approved
for this model.
2RD-28199-E1.book 15 ページ ２０１５年９月３日 木曜日 午後３時４２分

Yamaha SR400 Specifications

General

Engine Type	Air-cooled, 4-stroke, SOHC, 2-valve
Displacement	399cc
Bore x Stroke	87.0 mm x 67.2 mm
Compression Ratio	8.5:1
Fuel System	Fuel injection
Ignition System	TCI
Starter System	Kick
Transmission	5-speed
Final Drive	Chain
Front Suspension	Telescopic fork
Rear Suspension	Swingarm
Front Brake	Hydraulic single disc
Rear Brake	Drum
Front Tire	90/100-18M/C 54S
Rear Tire	110/90-18M/C 61S
Fuel Tank Capacity	12 liters
Seat Height	785 mm
Wet Weight	174 kg
Width	750 mm
Length	2085mm
Wheelbase	1, 410 mm
Ground Clearance	130 mm