2016 YAMAHA SR400 brake

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Periodic maintenance and adjustment
EAU17246
Periodic inspection, adjustment, and lu-
brication will keep your vehicle in the
safest and most efficient condition pos-
sible. Safety is an obl igation of the vehi-
cle owner/operator. The most important
points of vehicle inspection, adjust-
ment, and lubrication are explained on
the following pages.
The intervals given in the periodic
maintenance charts should be simply
considered as a general guide under
normal riding conditions. However, de-
pending on the weather, terrain, geo-
graphical location, and individual use,
the maintenance intervals may need to
be shortened.
WARNING
EWA10322
Failure to properly maintain the ve-
hicle or performing maintenance ac-
tivities incorrectly may increase
your risk of injury or death during
service or while using the vehicle. If
you are not familiar with vehicle ser-
vice, have a Yamaha dealer perform
service.
WARNING
EWA15123
Turn off the engine when performing
maintenance unless otherwise
specified.
A running engine has moving
parts that can catch on body
parts or clothing and electrical
parts that can cause shocks or
fires.
Running the engine while ser-
vicing can lead to eye injury,
burns, fire, or carbon monoxide
poisoning – possibly leading to death. See page 1-2 for more in-
formation about carbon monox-
ide.
WARNING
EWA15461
Brake discs, calipers, drums, and
linings can become very hot during
use. To avoid possible burns, let
brake components cool before
touching them.
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EAU64031
General maintenance and lubrication chart
NO. ITEM
1 Air filter element Replace. Every 20000 km (12500 mi)
2Clutch Check operation.
Adjust. 
3 *Timing chain Check timing chain tensioner.
Adjust if necessary. 
4 *Decompression
system Check operation.
Adjust or replace cable.

5 *Front brake Check operation, fluid level and
vehicle for fluid leakage.
Adjust brake lever free play. 
Replace brake pads. Whenever worn to the limit
6 *Rear brake Check operation and adjust
brake pedal free play. 
Replace brake shoes. Whenever worn to the limit
7 *Brake hose Check for cracks or damage.
Check for correct routing and
clamping. 
Replace. Every 4 years
8 *Brake fluid Change. Every 2 years
9 *Wheels Check runout, spoke tightness
and for damage.
Tighten spokes if necessary. 
10 *Tires Check tread depth and for
damage.
Replace if necessary.
Check air pressure.
Correct if necessary. 
11 *Wheel bearings Check bearings for looseness
or damage. 
12 *Swingarm Check operation and for
excessive play. 
Lubricate with lithium-soap- based grease. Every 50000 km (30000 mi)X 1000 km
CHECK OR
MAINTENANCE JOB
X 1000 mi
ODOMETER READINGS
ANNUAL CHECK
110203040
0.66121824
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Periodic maintenance and adjustment
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13 Drive chain Check chain slack, alignment
and condition.
Adjust and lubricate chain with a special O-ring chain lubricant
thoroughly. Every 500 km (300 mi) and after
washing the motorcycle, riding
in the rain or riding in wet areas
14 *Steering bearings Check bearing play and
steering for roughness. 
Lubricate with lithium-soap- based grease. Every 20000 km (12000 mi)
15 *Chassis fasteners Make sure that all nuts, bolts
and screws are properly
tightened. 
16 Brake lever pivot
shaft Lubricate with silicone grease.

17 Brake pedal pivot
shaft Lubricate with lithium-soap-
based grease. 
18 Clutch lever pivot
shaft Lubricate with lithium-soap-
based grease. 
19 Sidestand,
centerstand Check operation.
Lubricate with lithium-soap-
based grease. 
20 *Sidestand switch Check operation. 
21 *Front fork Check operation and for oil
leakage. 
22 *Shock absorber
assemblies Check operation and shock
absorbers for oil leakage. 
23 Engine oil Change.
Check oil level and vehicle for
oil leakage. 
24 Engine oil filter
element Replace.

25 *Front and rear
brake switches Check operation.

26 Moving parts and
cables Lubricate.

NO. ITEM
X 1000 km
CHECK OR
MAINTENANCE JOB
X 1000 mi
ODOMETER READINGS
ANNUAL CHECK
110203040
0.66121824
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EAU59350
TIP
Air filter This model’s air intake system is equipped with a disposable oil-coated pa- per element. The air filter element cannot be cleaned with compressed air,
it must be replaced.
The air filter element needs to be replaced more frequently when riding in unusually wet or dusty areas.
Hydraulic brake service After disassembling the brake master cylinder and caliper, always change the fluid. Regularly check the brake fluid level and fill the reservoir as re-
quired.
Every two years replace the internal components of the brake master cylin- der and caliper, and change the brake fluid.
Replace the brake hose every four years and if cracked or damaged.
27 *Throttle grip Check operation.
Check throttle grip free play,
and adjust if necessary.
Lubricate cable and grip housing. 
28 *Lights, signals and
switches Check operation.
Adjust headlight beam.

NO. ITEM
X 1000 km
CHECK OR
MAINTENANCE JOB
X 1000 mi
ODOMETER READINGS
ANNUAL CHECK
110203040
0.66121824
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WARNING
EWA10512
Never overload your vehicle. Opera-
tion of an overloaded vehicle could
cause an accident.
Tire inspection
The tires must be checked before each
ride. If the center tread depth reaches
the specified limit, if the tire has a nail or
glass fragments in it, or if the sidewall is
cracked, have a Yamaha dealer re-
place the tire immediately.
TIP
The tire tread depth limit may differ
from country to country. Always comply
with the local regulations.
WARNING
EWA10572
Have a Yamaha dealer replace
excessively worn tires. Besides
being illegal, operating the mo-
torcycle with excessively worn
tires decreases riding stability
and can lead to loss of control.
The replacement of all wheel-
and brake-related parts, includ-
ing the tires, should be left to a
Yamaha dealer, who has the
necessary professional knowl-
edge and experience.
It is not recommended to patch
a punctured tube. If unavoid-
able, however, patch the tube
very carefully and replace it as
soon as possible with a high-
quality product.
Ride at moderate speeds after
changing a tire since the tire
surface must first be “broken
in” for it to develop its optimal
characteristics.
Tire information
This model is equipped with tube tires.
Tires age, even if they have not been
used or have only been used occasion-
ally. Cracking of the tread and sidewall
rubber, sometimes accompanied by
carcass deformation, is an evidence of
Tire air pressure (measured on cold
tires): Up to 90 kg (198 lb) load:Front:175 kPa (1.75 kgf/cm
2, 25 psi)
Rear: 200 kPa (2.00 kgf/cm
2, 29 psi)
90 kg (198 lb) to maximum load:
Front:200 kPa (2.00 kgf/cm
2, 29 psi)
Rear:
225 kPa (2.25 kgf/cm
2, 33 psi)
Maximum load*: 150 kg (331 lb)
* Total weight of rider, passenger, car- go and accessories
1. Tire sidewall
2. Tire tread depth
Minimum tire tread depth (front and
rear): 1.6 mm (0.06 in)
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Periodic maintenance and adjustment
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EAU48444
Adjusting the brake lever free
play
Measure the brake lever free play as
shown.
Periodically check the brake lever free
play and, if necessary, adjust it as fol-
lows.
1. Slide the rubber cover back at the brake lever.
2. Loosen the locknut.
3. To increase the brake lever free play, turn the brake lever free play
adjusting screw in direction (a). To
decrease the brake lever free play,
turn the adjusting screw in direc-
tion (b).
4. Tighten the locknut, and then slide the rubber cover back to its original
position.
WARNING
EWA10631
After adjusting the brake lever
free play, check the free play
and make sure that the brake is working properly.
A soft or spongy feeling in the
brake lever can indicate the
presence of air in the hydraulic
system. If there is air in the hy-
draulic system, have a Yamaha
dealer bleed the system before
operating the motorcycle. Air in
the hydraulic system will dimin-
ish the braking performance,
which may result in loss of con-
trol and an accident.
Brake lever free play:
5.0–8.0 mm (0.20–0.31 in)
1. Locknut
2. Brake lever free play adjusting screw
3. Rubber cover
4. Brake lever free play
2 3
1
(a)
(b)
4
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Periodic maintenance and adjustment
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EAU22199
Adjusting the brake pedal
height and free play
WARNING
EWA10671
It is advisable to have a Yamaha
dealer make these adjustments.
Brake pedal height
The top of the brake pedal should be
positioned at the specified distance be-
low the top of the footrest as shown.
Periodically check the brake pedal
height and, if necessary, adjust it as fol-
lows. 1. Loosen the brake pedal height locknut.
2. To raise the brake pedal, turn the brake pedal height adjusting bolt in
direction (a). To lower the brake
pedal, turn the adjusting bolt in di-
rection (b). 3. Tighten the locknut.
WARNING
EWA11232
After adjusting the brake pedal
height, the brake pedal free play
must be adjusted.
Brake pedal free play
Measure the brake pedal free play as
shown.
Periodically check the brake pedal free
play and, if necessary, adjust it as fol-
lows.
To increase the brake pedal free play,
turn the brake pedal free play adjusting
nut at the brake rod in direction (a). To
Brake pedal height:
20.0 mm (0.79 in)
1. Brake pedal height
1
1. Brake pedal height locknut
2. Brake pedal height adjusting bolt
1. Brake pedal free play
Brake pedal free play:20.0–30.0 mm (0.79–1.18 in)
1
2
(b)
(a)
1
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Periodic maintenance and adjustment
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decrease the brake pedal free play,
turn the adjusting nut in direction (b).
WARNING
EWA10681
After adjusting the drive chain
slack or removing and installing
the rear wheel, always check the
brake pedal free play.
If proper adjustment cannot be
obtained as described, have a
Yamaha dealer make this ad-
justment.
After adjusting the brake pedal
free play, check the operation of
the brake light.
EAU44821
Checking the shift pedal
The operation of the shift pedal should
be checked before each ride. If opera-
tion is not smooth, have a Yamaha
dealer check the vehicle.
1. Brake pedal free play adjusting nut
(b)
(a)
1
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