2014 YAMAHA SR400 brake
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PERIODIC MAINTENANCE AND ADJUSTMENT
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EAU1770K
General maintenance an d lubrication chartNO. ITEM CHECK OR MAINTENANCE JOB ODOMETER READING
ANNUAL
CHECK
1000 km
(600 mi) 10000 km
(6000 mi) 20000 km
(12000 mi) 30000 km
(18000 mi) 40000 km
(24000 mi)
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 Replace. 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.
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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)
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.
NO. ITEM CHECK OR MAINTENANCE JOB
ODOMETER READING
ANNUAL
CHECK
1000 km
(600 mi) 10000 km
(6000 mi) 20000 km
(12000 mi) 30000 km
(18000 mi) 40000 km
(24000 mi)2RD-9-E0.book 5 ページ ２０１３年１１月２８日 木曜日 午後４時１８分
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EAU59350
TIP
Air filter
This model’s air intake system is equipped with a disposable oil-coated paper element. The air filter element cannot
be cleaned with compressed air, it must be replaced.
The air filter element needs to be replaced more fr equently 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 required.
Every two years replace the internal components of the brake master cylinder and caliper, and change the brake fluid. Replace the brake hose every four years and if cracked or damaged.
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.
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 CHECK OR MAINTENANCE JOB
ODOMETER READING
ANNUAL
CHECK
1000 km
(600 mi) 10000 km
(6000 mi) 20000 km
(12000 mi) 30000 km
(18000 mi) 40000 km
(24000 mi)
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12 Tire information
This motorcycle 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
ageing. Old and aged tires shall be
checked by tire specialists to ascertain
their suitability for further use.
WARNING
EWA10462
The front and rear tires should be of
the same make and design, other-
wise the handling characteristics of
the vehicle may be different, whichcould lead to an accident.
After extensive tests, only the tires list-
ed below have been approved for this
model by Yamaha Motor Co., Ltd.
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 optimalcharacteristics.
Front tire:
Size:90/100-18M/C 54S
Manufacturer/model:
METZELER/ME77 Front
Rear tire: Size:
110/90-18M/C 61S
Manufacturer/model: METZELER/ME77
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PERIODIC MAINTENANCE AND ADJUSTMENT
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12 lever free play, turn the adjusting
bolt in direction (b).
4. Tighten the locknut and then slide the rubber cover to its original po-
sition.
TIPIf the specified free play cannot be ob-
tained as described above or if the
clutch does not operate correctly, have
a Yamaha dealer check the internalclutch mechanism.
EAU48443
Adjusting the brake lever free
playThe brake lever free play should mea-
sure 5.0–8.0 mm (0.20–0.31 in) as
shown. Periodically check the brake le-
ver free play and, if necessary, adjust it
as follows.
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.
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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EAU60900
Adjusting the brake pedal
height and free play
WARNING
EWA10671
It is advisable to have a Yamahadealer make these adjustments.
Brake pedal height
The top of the brake pedal should be
positioned approximately 20.0 mm
(0.79 in) below the top of the footrest.
Periodically check the brake pedal
height and, if necessary, adjust it as fol-
lows. 1. Loosen the locknut at the frame.
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 playmust be adjusted. Brake pedal free play
The brake pedal free play should mea-
sure 20.0–30.0 mm (0.79–1.18 in) as
shown. Periodically check the brake
pedal free play and, if necessary, adjust
it as follows.
To increase the brake pedal free play,
turn the brake pedal free play adjusting
nut at the brake rod in direction (a). To
decrease the brake pedal free play,
turn the adjusting nut in direction (b).
1. Brake pedal height
1
1. Locknut
2. Brake pedal height adjusting bolt
1
2
(b)
(a)
1. Brake pedal free play
1
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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 ofthe brake light.
EAU44821
Checking the shift pedalThe operation of the shift pedal should
be checked before each ride. If opera-
tion is not smooth, have a Yamaha
dealer check the vehicle.
EAU22274
Brake light switchesThe brake light, which is activated by
the brake pedal and brake lever, should
come on just before braking takes ef-
fect. If necessary, adjust the rear brake
light switch as follows, but the front
brake light switch should be adjusted
by a Yamaha dealer.
Turn the rear brake light switch adjust-
ing nut while holding the rear brake light
switch in place. To make the brake light
come on earlier, turn the adjusting nut
in direction (a). To make the brake light
come on later, turn the adjusting nut in
direction (b).
1. Brake pedal free play adjusting nut
(b)
(a)
1
1. Rear brake light switch adjusting nut
2. Rear brake light switch
2
1 (a)
(b)
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EAU22382
Checking the front brake pads
and rear brake shoes The front brake pads and the rear brake
shoes must be checked for wear at the
intervals specified in the periodic main-
tenance and lubrication chart.
EAU22432
Front brake pads
Each front brake pad is provided with
wear indicator grooves, which allow
you to check the brake pad wear with-
out having to disassemble the brake.
To check the brake pad wear, check
the wear indicator grooves. If a brake
pad has worn to the point that the wear indicator grooves have almost disap-
peared, have a Yamaha dealer replace
the brake pads as a set.
EAU22541
Rear brake shoes
The rear brake is provided with a wear
indicator, which allows you to check the
brake shoe wear without having to dis-
assemble the brake. To check the
brake shoe wear, check the position of
the wear indicator while applying the
brake. If a brake shoe has worn to the
point that the wear indicator reaches
the wear limit line, have a Yamaha
dealer replace the brake shoes as a
set.
EAU32346
Checking the brake fluid levelBefore riding, check that the brake fluid
is above the minimum level mark.
Check the brake fluid level with the top
of the reservoir level. Replenish the
brake fluid if necessary.
WARNING
EWA15991
Improper maintenance can result in
loss of braking ability. Observe
these precautions:
Insufficient brake fluid may al-
low air to enter the brake sys-
tem, reducing braking
1. Brake pad
2. Brake pad wear indicator groove1
2
1. Brake shoe wear indicator
2. Brake shoe wear limit line
12
1. Minimum level markSpecified brake fluid:
DOT 41
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