2007 YAMAHA XTZ125 engine

6-28
6-28
Rear suspensionSidestand
Lubricate the pivoting parts. Check to see that the sidestand
moves up and down smoothly.
RECOMMENDED LUBRICANT:
Engine oil SAE 20W50
If the sidestand does not move smoothly, consult a
Yamaha dealer.
Lubricate the rear suspension through the nipple.
RECOMMENDED LUBRICANT:
Molybdenum dissulfide grease

0
1


WARNING:
Rear suspensionSidestand
Lubricate the pivoting parts. Check to see that the sidestand
moves up and down smoothly.
RECOMMENDED LUBRICANT:
Engine oil SAE 20W50
If the sidestand does not move smoothly, consult a
Yamaha dealer.
Lubricate the rear suspension through the nipple.
RECOMMENDED LUBRICANT:
Molybdenum dissulfide grease

0
1


WARNING:

6-31
6-31
Wheel bearings
If there is play in the front or rear wheel hub or if the wheel
does not turn smoothly, have a Yamaha dealer inspect the
wheel bearings. The wheel bearings should be inspected
according to the Maintenance Schedule. Steering inspection
Securely support the motorcycle so there is no danger
of it falling over. Periodically inspect the condition of the steering. Worn out
or loose steering bearings may be dangerous. Place a stand
under the engine to raise the front wheel off the ground.
Hold the lower end of the front forks and try to move them
forward and backward. If any free play can be felt, ask a
Yamaha dealer to inspect and adjust the steering. Inspection
is easier if the front wheel is removed.
WARNING:
Wheel bearings
If there is play in the front or rear wheel hub or if the wheel
does not turn smoothly, have a Yamaha dealer inspect the
wheel bearings. The wheel bearings should be inspected
according to the Maintenance Schedule. Steering inspection
Securely support the motorcycle so there is no danger
of it falling over. Periodically inspect the condition of the steering. Worn out
or loose steering bearings may be dangerous. Place a stand
under the engine to raise the front wheel off the ground.
Hold the lower end of the front forks and try to move them
forward and backward. If any free play can be felt, ask a
Yamaha dealer to inspect and adjust the steering. Inspection
is easier if the front wheel is removed.
WARNING:

6-37
6-37
Front wheel removal

!
 




CAUTION:
It is advisable to have a Yamaha dealer service the
wheel.
Securely support the motorcycle so there is no danger
of it falling over.
1. Place a stand under the engine to raise the fornt wheel
off the ground.
2. Remove the speedometer cable.
3. Remove the axle nut and axle.
NOTE:
Do not depress the brake lever when the disc is off the
caliper as the brake pads will be forced shut.
Front wheel removal

!
 




CAUTION:
It is advisable to have a Yamaha dealer service the
wheel.
Securely support the motorcycle so there is no danger
of it falling over.
1. Place a stand under the engine to raise the fornt wheel
off the ground.
2. Remove the speedometer cable.
3. Remove the axle nut and axle.
NOTE:
Do not depress the brake lever when the disc is off the
caliper as the brake pads will be forced shut.

6-39
6-39
Rear wheel removal

!&
  

. 


 2!

It is advisable to have a Yamaha dealer service the
wheel.
Securely support the motorcycle so there is no danger
of it falling over.
1. Remove the brake adjuster.
2. Remove the brake rod from the brake cam lever.
3. Loosen the axle nut.
4. Elevate the rear wheel by placing a stand under the
engine.
5. Remove the axle nut.
6. Push the wheel forward and remove the drive chain.
NOTA:
There is no need of disassembling the drive chain to
remove or reinstall the rear wheel.
7. Pull out the axle and remove the wheel assembly by
pulling backward.
CAUTION:
Rear wheel removal

!&
  

. 


 2!

It is advisable to have a Yamaha dealer service the
wheel.
Securely support the motorcycle so there is no danger
of it falling over.
1. Remove the brake adjuster.
2. Remove the brake rod from the brake cam lever.
3. Loosen the axle nut.
4. Elevate the rear wheel by placing a stand under the
engine.
5. Remove the axle nut.
6. Push the wheel forward and remove the drive chain.
NOTA:
There is no need of disassembling the drive chain to
remove or reinstall the rear wheel.
7. Pull out the axle and remove the wheel assembly by
pulling backward.
CAUTION:

6-42
6-42 Troubleshooting chart
ADVERTENC
Never check the fuel system while smoking or in the
vicinity of an open flame.
WARNING:
Check if there is
fuel in the fuel tank
Use electric
starter
Remove spark plug
and check
electrode
Use electric starter 1. Fuel
2. Compression
3. Ignition
4. Battery *Enough fuel
No fuel
There is compression
No compression
Wet
Dry
Engine turns
over quickly
Engine turns
over slowlySupply fuel
Go to ignition check
Ask Yamaha dealer to inspect
Wipe clean with dry cloth and correct
spark plug gap or replace spark plugs
Ask Yamaha dealer to inspect
Battery good
Check fluid, recharge
and check
connections
Go to compression
check
Engine doesn’t start, go to
compression check
Open the throttle hal-way
and start the engine
Engine doesn’t start, ask
Yamaha dealer to inspect.Engine doesn’t start,
go to battery check
* Obs.: XTZ 125E
Troubleshooting chart
ADVERTENC
Never check the fuel system while smoking or in the
vicinity of an open flame.
WARNING:
Check if there is
fuel in the fuel tank
Use electric
starter
Remove spark plug
and check
electrode
Use electric starter 1. Fuel
2. Compression
3. Ignition
4. Battery *Enough fuel
No fuel
There is compression
No compression
Wet
Dry
Engine turns
over quickly
Engine turns
over slowlySupply fuel
Go to ignition check
Ask Yamaha dealer to inspect
Wipe clean with dry cloth and correct
spark plug gap or replace spark plugs
Ask Yamaha dealer to inspect
Battery good
Check fluid, recharge
and check
connections
Go to compression
check
Engine doesn’t start, go to
compression check
Open the throttle hal-way
and start the engine
Engine doesn’t start, ask
Yamaha dealer to inspect.Engine doesn’t start,
go to battery check
* Obs.: XTZ 125E

7-1
7-1 A. Cleaning
Frequent, thorough cleaning of your motorcycle will not only
enhance its appearance but will improve its general
performance and extend the useful life of many components.
1. Before cleaning the motorcycle:
a. Block off the end of the exhaust pipe to prevent water
entry; a plastic bag and strong rubber band may be
used.
b. Make sure the spark plug and all filler caps are properly
installed.
2. If the engine case is excessively greasy, apply
degreaser with a paint brush. Do not apply degreaser
to the chain, sprockets, or wheel axles.
3. Rinse the dirt and degreaser off with a garden hose,
Use only enough pressure to do the job.
CAUTION:
Excessive hose pressure may cause water seepage and
deterioration of wheel bearings, front fork, brakes,
transmission seals and electrical parts.
Many expensive repair bills have resulted from
improper high pressure detergent applications such as
those available in coin-operated car washers.
4. Once the majority of the dirt has been hosed off, wash
all surfaces with warm water and mild, detergent-type
soap. An old toothbrush or bottle brush is handy for
hard-to-get-at places.
5. Rinse the motorcycle off immediately with clean water
and dry all surfaces with a chamois, clean towel, or
soft absorbent cloth.
6. Dry the chain and lubricate it to prevent rust.
7. Clean the seat with a vinyl upholstery cleaner to keep
the cover pliable and glossy.
8. Automotive-type wax may be applied to all painted and
chrome-plated surfaces. Avoid combination cleaner-
waxes. Many contain abrasives which may mar the paint
or protective finish. When finished, start the engine and
let it idle for several minutes.
CLEANING AND STORAGE
A. Cleaning
Frequent, thorough cleaning of your motorcycle will not only
enhance its appearance but will improve its general
performance and extend the useful life of many components.
1. Before cleaning the motorcycle:
a. Block off the end of the exhaust pipe to prevent water
entry; a plastic bag and strong rubber band may be
used.
b. Make sure the spark plug and all filler caps are properly
installed.
2. If the engine case is excessively greasy, apply
degreaser with a paint brush. Do not apply degreaser
to the chain, sprockets, or wheel axles.
3. Rinse the dirt and degreaser off with a garden hose,
Use only enough pressure to do the job.CAUTION:
Excessive hose pressure may cause water seepage and
deterioration of wheel bearings, front fork, brakes,
transmission seals and electrical parts.
Many expensive repair bills have resulted from
improper high pressure detergent applications such as
those available in coin-operated car washers.
4. Once the majority of the dirt has been hosed off, wash
all surfaces with warm water and mild, detergent-type
soap. An old toothbrush or bottle brush is handy for
hard-to-get-at places.
5. Rinse the motorcycle off immediately with clean water
and dry all surfaces with a chamois, clean towel, or
soft absorbent cloth.
6. Dry the chain and lubricate it to prevent rust.
7. Clean the seat with a vinyl upholstery cleaner to keep
the cover pliable and glossy.
8. Automotive-type wax may be applied to all painted and
chrome-plated surfaces. Avoid combination cleaner-
waxes. Many contain abrasives which may mar the paint
or protective finish. When finished, start the engine and
let it idle for several minutes.
CLEANING AND STORAGE

7-2
7-2 B. Storage
Long term storage (30 days or more) of your machine will
require some preventive procedures to guard against
deterioration. After thoroughly cleaning the machine,
prepare for storage as follows:
1. Drain the fuel tank, fuel lines, and carburetor float
bowl(s).
2. Remove the spark plug(s), pour about one tablespoon
of SAE 20W50 motor oil in the spark plug hole(s) and
reinstall the spark plug(s).
Crank the engine over several times (with the
ignition off) to coat the cylinder walls with oil.
3. Remove the drive chain. Clean it thoroughly with
solvent and lubricate it.
Reinstall the chain or store it in a plastic bag
(tied to frame for safe-keeping).
4. Lubricate all control cables.
5. Block up the frame to raise both wheels off the
ground.
6. Tie a plastic bag over the exhaust pipe outlet to
prevent moisture from entering.7. If storing in a humid or salt-air atmosphere, coat
all exposed metal surfaces with a light film of
oil. Do not apply oil to any rubber parts or the
seat cover.
8. Remove the battery and charge it. Store it in a dry place
and recharge it once a month. Do not store the battery
in an excessively warm or cold place (less than 0ºC
(30ºF) or more than 30ºC (90ºF).
NOTE:
Make any necessary repairs before storing the machine.
B. Storage
Long term storage (30 days or more) of your machine will
require some preventive procedures to guard against
deterioration. After thoroughly cleaning the machine,
prepare for storage as follows:
1. Drain the fuel tank, fuel lines, and carburetor float
bowl(s).
2. Remove the spark plug(s), pour about one tablespoon
of SAE 20W50 motor oil in the spark plug hole(s) and
reinstall the spark plug(s).
Crank the engine over several times (with the
ignition off) to coat the cylinder walls with oil.
3. Remove the drive chain. Clean it thoroughly with
solvent and lubricate it.
Reinstall the chain or store it in a plastic bag
(tied to frame for safe-keeping).
4. Lubricate all control cables.
5. Block up the frame to raise both wheels off the
ground.
6. Tie a plastic bag over the exhaust pipe outlet to
prevent moisture from entering.7. If storing in a humid or salt-air atmosphere, coat
all exposed metal surfaces with a light film of
oil. Do not apply oil to any rubber parts or the
seat cover.
8. Remove the battery and charge it. Store it in a dry place
and recharge it once a month. Do not store the battery
in an excessively warm or cold place (less than 0ºC
(30ºF) or more than 30ºC (90ºF).
NOTE:
Make any necessary repairs before storing the machine.

8-1
8-1
SPECIFICATIONS
MODEL
Dimension:
Overall length
Overall width
Overall height
Seat height
Wheet base
Minimum ground clearance
Basic weight:
With oil and without fuel:
Minimum turning radius:
Engine:
Type
Cylinder arrangement
Displacement
Bore x Stroke
Compression rate
Starting system
Lubrification system
103 Kg (227 lb)
113 Kg (249 lb) 2.090 mm (82.3 in)
810 mm (31.9 in)
1.125 mm (44.3 in)
840 mm (33.1 in)
1.340 mm (52.7 in)
265 mm (10.4 in)
2.100 mm (82.7 in)
XTZ 125K
Air cooled, 4-stroke
gasoline, SOHC
Single cylinder
123.7 cm
3
54 x 54 mm (2.13 x 2.13 in)
10.0 : 1
Kick starter
Wet sump
104 Kg (229 lb)
114 Kg (251 lb) 2.090 mm (82.3 in)
810 mm (31.9 in)
1.125 mm (44.3 in)
840 mm (33.1 in)
1.340 mm (52.7 in)
265 mm (10.4 in)
2.100 mm (82.7 in)
XTZ 125E
Air cooled, 4-stroke
gasoline, SOHC
Single cylinder
123.7 cm
3
54 x 54 mm (2.13 x 2.13 in)
10.0 : 1
Electric starter
Wet sump
SPECIFICATIONS
MODEL
Dimension:
Overall length
Overall width
Overall height
Seat height
Wheet base
Minimum ground clearance
Basic weight:
With oil and without fuel:
Minimum turning radius:
Engine:
Type
Cylinder arrangement
Displacement
Bore x Stroke
Compression rate
Starting system
Lubrification system
103 Kg (227 lb)
113 Kg (249 lb) 2.090 mm (82.3 in)
810 mm (31.9 in)
1.125 mm (44.3 in)
840 mm (33.1 in)
1.340 mm (52.7 in)
265 mm (10.4 in)
2.100 mm (82.7 in)
XTZ 125K
Air cooled, 4-stroke
gasoline, SOHC
Single cylinder
123.7 cm
3
54 x 54 mm (2.13 x 2.13 in)
10.0 : 1
Kick starter
Wet sump
104 Kg (229 lb)
114 Kg (251 lb) 2.090 mm (82.3 in)
810 mm (31.9 in)
1.125 mm (44.3 in)
840 mm (33.1 in)
1.340 mm (52.7 in)
265 mm (10.4 in)
2.100 mm (82.7 in)
XTZ 125E
Air cooled, 4-stroke
gasoline, SOHC
Single cylinder
123.7 cm
3
54 x 54 mm (2.13 x 2.13 in)
10.0 : 1
Electric starter
Wet sump