YAMAHA YBR125 2006 Owner's Guide

OPERATION AND IMPORTANT RIDING POINTS
5-3
5
CAUTION:
ECA10260


Even with the transmission in
the neutral position, do not
coast for long periods of time
with the engine off, and do not
tow the motorcycle for long dis-
tances. The transmission is
properly lubricated only when
the engine is running. Inade-
quate lubrication may damage
the transmission.


Always use the clutch while
changing gears to avoid damag-
ing the engine, transmission,
and drive train, which are not
designed to withstand theshock of forced shifting.
EAU16800
Tips for reducing fuel
consumption Fuel consumption depends largely on
your riding style. Consider the following
tips to reduce fuel consumption:

Turn the starter (choke) off as
soon as possible.


Shift up swiftly, and avoid high en-
gine speeds during acceleration.


Do not rev the engine while shifting
down, and avoid high engine
speeds with no load on the engine.


Turn the engine off instead of let-
ting it idle for an extended length of
time (e.g., in traffic jams, at traffic
lights or at railroad crossings).
EAU16841
Engine break-in There is never a more important period
in the life of your engine than the period
between 0 and 1600 km (1000 mi). For
this reason, you should read the follow-
ing material carefully.
Since the engine is brand new, do not
put an excessive load on it for the first
1600 km (1000 mi). The various parts in
the engine wear and polish themselves
to the correct operating clearances.
During this period, prolonged full-throt-
tle operation or any condition that might
result in engine overheating must be
avoided.
EAU37250
0–500 km (0–300 mi)
Avoid prolonged operation above 6000
r/min.
After every hour of operation, stop the
engine, and then let it cool for five to ten
minutes.
Vary the engine speed from time to
time. Do not operate the engine at one
set throttle position.
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OPERATION AND IMPORTANT RIDING POINTS
5-4
5500–1000 km (300–600 mi)
Avoid prolonged operation above 7500
r/min.
Rev the engine freely through the
gears, but do not use full throttle at any
time.
CAUTION:
ECA10280
After 1000 km (600 mi) of operation,the engine oil must be changed.
1000 km (600 mi) and beyond
The vehicle can now be operated nor-
mally.CAUTION:
ECA10310


Keep the engine speed out of
the tachometer red zone.


If any engine trouble should oc-
cur during the engine break-in
period, immediately have a
Yamaha dealer check the vehi-cle.
EAU37200
Parking When parking, stop the engine, remove
the key from the main switch, and then
turn the fuel cock lever to “OFF” or “”.
WARNING
EWA10310


Since the engine and exhaust
system can become very hot,
park in a place where pedestri-
ans or children are not likely to
touch them.


Do not park on a slope or on soft
ground, otherwise the vehiclemay overturn.
CAUTION:
ECA10380
Never park in an area where there
are fire hazards such as grass orother flammable materials.
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-1
6
EAU17240
Safety is an obligation of the owner. Pe-
riodic inspection, adjustment and lubri-
cation will keep your vehicle in the
safest and most efficient condition pos-
sible. The most important points of in-
spection, adjustment, and lubrication
are explained on the following pages.
The intervals given in the periodic
maintenance and lubrication chart
should be simply considered as a gen-
eral guide under normal riding condi-
tions. However, DEPENDING ON THE
WEATHER, TERRAIN, GEOGRAPHI-
CAL LOCATION, AND INDIVIDUAL
USE, THE MAINTENANCE INTER-
VALS MAY NEED TO BE SHORT-
ENED.
WARNING
EWA10320
If you are not familiar with mainte-
nance work, have a Yamaha dealerdo it for you.
EAU17340
Owner’s tool kit The owner’s tool kit is located behind
panel B. (See page 6-5.)
The service information included in this
manual and the tools provided in the
owner’s tool kit are intended to assist
you in the performance of preventive
maintenance and minor repairs. How-
ever, additional tools such as a torque
wrench may be necessary to perform
certain maintenance work correctly.NOTE:If you do not have the tools or experi-
ence required for a particular job, havea Yamaha dealer perform it for you.
WARNING
EWA10350
Modifications not approved by
Yamaha may cause loss of perfor-
mance and render the vehicle un-
safe for use. Consult a Yamaha
dealer before attempting any chang-es.
1. Owner’s tool kit
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-2
6
EAU17710
Periodic maintenance and lubrication chart NOTE:

The annual checks must be performed every year, except if a kilometer-based maintenance is performed in-
stead.


From 30000 km, repeat the maintenance intervals starting from 6000 km.


Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technicalskills.
NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING (× 1000 km)
ANNUAL
CHECK
1 6 12 18 24
1*Fuel lineCheck fuel hoses for cracks or damage.√√√√ √
2*Fuel cock filterCheck condition.√√
3 Spark plugCheck condition.
Clean and regap.√√
Replace.√√
4*ValvesCheck valve clearance.
Adjust.√√√√
5 Air filter elementClean.√√
Replace.√√
6*BatteryCheck electrolyte level and specific gravity.
Make sure that the breather hose is properly routed.√√√√ √
7ClutchCheck operation.
Adjust.√√√√√
8*Front brakeCheck operation, fluid level and vehicle for fluid leakage.√√√√√ √
Replace brake pads. Whenever worn to the limit
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-3
6
9*Rear brakeCheck operation and adjust brake pedal free play.√√√√√ √
Replace brake shoes. Whenever worn to the limit
10*Brake hoseCheck for cracks or damage.√√√√ √
Replace. Every 4 years
11*WheelsCheck runout and for damage.√√√√
12*TiresCheck tread depth and for damage.
Replace if necessary.
Check air pressure.
Correct if necessary.√√√√ √
13*Wheel bearingsCheck bearing for looseness or damage.√√√√
14*SwingarmCheck operation and for excessive play.√√√√
Lubricate with lithium-soap-based grease. Every 24000 km
15 Drive chainCheck chain slack, alignment and condition.
Adjust and lubricate chain with a special O-ring chain lu-
bricant thoroughly.Every 1000 km and after washing the motorcycle or
riding in the rain
16*Steering bearingsCheck bearing play and steering for roughness.√√√√√
Lubricate with lithium-soap-based grease. Every 24000 km
17*Chassis fastenersMake sure that all nuts, bolts and screws are properly
tightened.√√√√ √
18 CenterstandCheck operation.
Lubricate.√√√√ √
19*Front forkCheck operation and for oil leakage.√√√√
20*Shock absorber assem-
bliesCheck operation and shock absorbers for oil leakage.√√√√ NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING (× 1000 km)
ANNUAL
CHECK
1 6 12 18 24
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-4
6
EAU18660
NOTE:

The air filter needs more frequent service if you are riding in unusually wet or dusty areas.


Hydraulic brake service
Regularly check and, if necessary, correct the brake fluid level.
Every two years replace the internal components of the brake master cylinder and caliper, and change the brake fluid.Replace the brake hoses every four years and if cracked or damaged.
21*CarburetorCheck starter (choke) operation.
Adjust engine idling speed.√√√√√ √
22 Engine oilChange.
Check oil level and vehicle for oil leakage.√√√√√ √
23*Front and rear brake
switchesCheck operation.√√√√√ √
24Moving parts and ca-
blesLubricate.√√√√ √
25*Throttle grip housing
and cableCheck operation and free play.
Adjust the throttle cable free play if necessary.
Lubricate the throttle grip housing and cable.√√√√ √
26*Air induction systemCheck the air cut-off valve, reed valve, and hose for dam-
age.
Replace any damaged parts if necessary.√√√√ √
27*Lights, signals and
switchesCheck operation.
Adjust headlight beam.√√√√√ √ NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING (× 1000 km)
ANNUAL
CHECK
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-5
6
EAU18721
Removing and installing the
cowling and panels The cowling and panels shown need to
be removed to perform some of the
maintenance jobs described in this
chapter. Refer to this section each time
the cowling or a panel needs to be re-
moved and installed.
EAU37082
Cowling
To remove the cowling1. Remove panels A and B. (See
pages 6-5.)
2. Remove the bolt on each side of
the seat and pull the seat off.3. Remove the carrier by removing
the bolts.
4. Remove the screws, and then pull
the cowling off as shown.
1. Panel A
2. Cowling
1. Panel B
1. Bolt
1. Bolt
2. Carrier
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-6
6To install the cowling
1. Place the cowling in the original
position, and then install the
screws.
2. Install the carrier by installing the
bolts, and then tightening them to
the specified torque.3. Place the seat in the original posi-
tion, and then tighten the bolts.
4. Install the panels.
EAU37070
Panel A
To remove the panel1. Remove the screw.2. Pull the front of the panel out, and
then slide the panel forward to re-
lease it in the rear.
To install the panel
1. Secure the rear of the panel, and
then push the front of the panel in.
1. Screw
2. Cowling
Tightening torque:
Carrier bolt:
30 Nm (3.0 m·kgf, 22 ft·lbf)
1. Screw
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-7
6 2. Install the screw.
EAU36960
Panel B
To remove the panel1. Slide the panel lock cover open, in-
sert the key into the lock, and then
turn it 1/4 turn clockwise.2. Pull the front of the panel out with
the key inserted in the lock, and
then slide the panel forward to re-
lease it in the rear.To install the panel
1. Secure the rear of the panel, and
then push the front of the panel in
with the key inserted in the lock.
2. Turn the key counterclockwise to
the original position, remove it, and
then close the panel lock cover.
1. Panel lock cover
2. Unlock.
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-8
6
EAU19602
Checking the spark plug The spark plug is an important engine
component, which is easy to check.
Since heat and deposits will cause any
spark plug to slowly erode, the spark
plug should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plug can re-
veal the condition of the engine.
To remove the spark plug
1. Remove the spark plug cap.
2. Remove the spark plug as shown,
with the spark plug wrench includ-
ed in the owner’s tool kit.To check the spark plug
1. Check that the porcelain insulator
around the center electrode of the
spark plug is a medium-to-light tan
(the ideal color when the vehicle is
ridden normally).
NOTE:
If the spark plug shows a distinctly dif-
ferent color, the engine could be defec-
tive. Do not attempt to diagnose such
problems yourself. Instead, have aYamaha dealer check the vehicle.
2. Check the spark plug for electrode
erosion and excessive carbon or
other deposits, and replace it if
necessary.To install the spark plug
1. Measure the spark plug gap with a
wire thickness gauge and, if nec-
essary, adjust the gap to specifica-
tion.
2. Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the
spark plug threads.
1. Spark plug cap
1. Spark plug wrench
Specified spark plug:
NGK/CR6HSA1. Spark plug gapSpark plug gap:
0.6–0.7 mm (0.024–0.028 in)
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