Yamaha XT 125R 2005 Instrucciones de funcionamiento e instalación

IDM C144600300.fm

2005

XT 125R

XT 125X

SERVICE

INFORMATION

IDM C144600300.fm

WARNING

This Manual has been written by Yamaha Motor and is addressed to Yamaha vendors and their qualified

engineers. This Manual cannot cover any aspect of mechanical knowledge; therefore, anyone who will refer to this

manual is expected to have a basic knowledge of the mechanical skills required for servicing and repairing Yamaha

motorcycles. Repairing performed by unskilled personnel may cause motorcycles to be unserviceable and

dangerous.

Yamaha Motor is constantly searching for enhancing all its motorcycle models. Authorized Yamaha distributors will

be informed of substantial changes and improvements made to specifications or mounting procedures; these ones

will be stated in the following issues of this Manual, when required.

NOTE: The motorcycle model and specifications are subject to changes without prior notice.

IMPORTANT INFORMATION

Particularly important information is highlighted as follows:

The symbol of danger means CAUTION! BEWARE! YOUR SAFETY DEPENDS ON THIS!

The non-observance of WARNINGS can cause serious injury or the death of the

motorcyclist, of the people standing near the motorcycle or the repairer of the motorcycle.

A CAUTION notice implies particular care to be taken not to damage the motorcycle.

A NOTE contains important information for a better comprehension of the described

procedures.

WARNING:

CAUTION:

NOTE:

IDM C144600300.fm

GRAPHIC SYMBOLS

Symbols to are drawn as tabs to indicate the

chapter number and its content.

General Information

Technical Specifications

Scheduled Servicing and Adjustment

Engine

Carburetion

Frame

Electrical System

Troubleshooting

Symbols to are used to identify technical

specifications stated in this Manual.

Repairing Possible with Engine in Place

Filling Up

Lubricant

Special Components

Tightening

Wear Limit, Distance

Engine RPM

Ω, V, A (to be measured with a tester)

Symbols to illustrated in the diagram indicate the

types of lubricant to be used and the greasing points.

Use Engine Oil

Use Oil for Spare Parts

Use Molybdenum-Bisulphide Oil

Use Grease for Bearings

Use Grease Made of Light Lithium Soap

Use Molybdenum-Bisulphide Grease

Symbols - illustrated in the diagram indicate where

to apply the high-resistance sealer and where to

install new Component Parts .

Apply High-Resistance Sealer (LOCTITE®)

Use a New Component Part

916

17 22

23 24

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IDM C144600300.fm

INDEX

GENERAL INFORMATION ......................................................................................................6

IDENTIFICATION OF THE MOTORCYCLE .........................................................................6

SPECIAL COMPONENTS ....................................................................................................7

TECHNICAL SPECIFICATIONS ..............................................................................................9

GENERAL FEATURES ........................................................................................................9

SERVICING TECHNICAL DATA ...........................................................................................12

ENGINE ..............................................................................................................................12

LUBRICATION DIAGRAMS ................................................................................................15

ENGINE TIGHTENING TORQUES ....................................................................................17

FRAME ...............................................................................................................................18

FRAME TIGHTENING TORQUES .....................................................................................20

ELECTRICAL SYSTEM ......................................................................................................21

WIRING ...................................................................................................................................24

WIRING (1) .........................................................................................................................24

WIRING (2) ......................................................................................................................... 26

SCHEDULED SERVICING AND ADJUSTMENT ...................................................................28

SCHEDULED MAINTENANCE AND GREASING...............................................................28

WIRING DIAGRAM ................................................................................................................30

IDM C144600300.fm

GENERAL INFORMATION

GEN

INFO

GENERAL INFORMATION

IDENTIFICATION OF THE MOTORCYCLE

Serial Number of the Frame

The Serial Number of the frame is

marked on the metal tube of the

handlebar.

NOTE: The Serial Number of the

frame is used for the motorcycle

identification and registration.

Serial Number of the Engine

The Serial Number of the Engine is

marked on the right side of the

crankcase.

NOTE: The first three figures of this

Serial Number identify the

motorcycle model; the remaining

figures indicate the production

number of the unit.

NOTE: Technical specifications and

drawings can be changed without

prior notice.

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IDM-44600300200.tif

IDM C144600300.fm

GENERAL INFORMATION

GEN

INFO

SPECIAL COMPONENTS

The special components listed below are required for a complete and accurate tuning and assembly of the

motorcycle. The use of proper special instruments prevents damages caused by improper instruments or made-

up techniques.

When ordering a special component, please refer to the list below to avoid any mistake.

Component N. Description Picture

90890-01312 Fuel Indicator

The fuel indicator is used to measure the fuel level in the

carburettor float chamber.

90890-06760 Rev Counter

The rev counter is used to measure the engine RPM.

90890-04086/09 All-purpose Clutch Support

This support is used to lock the clutch when assembling

or disassembling the clutch locking nut.

90890-01701 Pulley Lock

The pulley lock is used to lock the secondary pulley.

90890-01862 Flywheel Puller

This is used to pull out the flywheel.

90890-01304 Pin Puller

The pin puller is used to pull out the piston pin.

90890-01135 Tool for Drive Shaft Remover

This tool is used to remove the drive shaft or to separate

the crankcase.

IDM C144600300.fm

GENERAL INFORMATION

GEN

INFO

(*) Indications from Yamaha are required about the compatibility of the components above. If they are not compatible, ID codes and drawings

of new components are required. Otherwise, Yamaha should state which components are to be excluded from this Manual.

90890-01274 (1)

90890-01275 (2)

90890-01278 (3)

Tool for Drive Shaft Installation

Drive Shaft Pin

Adaptor (M12)

(*) 90890-01326 T-tool

The T-tool is used to hold the shock absorber rod when it

is removed or installed.

(*) 90890-01367

(*) 90890-01381

Fork Clamp

Fork Clamp Fitting

The fork clamp fitting is used to install the fork cross.

(*) 90890-01403 Nut Ring Wrench

This wrench is used to loosen and tighten the nut ring of

the handlebar.

90890-03112 Pocket Tester

The pocket tester is required to check the electrical

system.

Component N. Description Picture

IDM C144600300.fm

TECHNICAL SPECIFICATIONS SPEC

TECHNICAL SPECIFICATIONS

GENERAL FEATURES

Model XT 125R XT 125X

Dimensions:

Overall Length 2110 mm 2040 mm

Overall Width 860 mm 860 mm

Overall Height 1130 mm 1090 mm

Saddle Height 860 mm 830 mm

Pitch 1340 mm 1340 mm

Min. Distance from the Ground 300 mm 271 mm

Min. Turning Radius 2100 mm 2016 mm

Net Weight:

Oil and Fuel Included 120 kg 120 kg

Engine:

Type of Engine: 4-stroke, air-cooling

Feeding System Carburettor

Cylinder Arrangement Tilted forward, single-cylinder

Displacement 123.7 cm3

Diameter per Stroke 54.0x54.0

Compression Ratio 10:1 ±0.5

Max. Power 7.3 kW / 8500 RPM

Max. Torque 9.5 N*m / 5500 RPM

Min. Speed 1600~1800 RPM

Starting System Electrical and manual starter

Lubrication System Yamaha Autolube

Oil Type or Grade:

Motor Oil YAMALUBE 4, SAE 10W30/SH or equivalent

Total Quantity 1.2 L

Scheduled Oil Change 1.0 L

Air Filter: Humid-element type

Fuel:

Type Unleaded

Fuel Tank:

Capacity 10 L

Low Fuel 2.0 L

IDM C144600300.fm

TECHNICAL SPECIFICATIONS SPEC

Carburettor:

Type/Quantity VM20SS

Manufacturer MIKUNI

Spark Plugs:

Type CR7HSA

Manufacturer NGK

Distance between Electrodes 0.6 mm (0.0236 in)

Type of Clutch: Oil-bath, multiple disc

Gear:

Primary Step-down System Worm gear

Primary Step-down Ratio 68/20 (1/3,4)

Secondary Step-down Ratio Drive chain

Secondary Step-down Ratio 50/14 (3.5715) 48/14 (3.4286)

Type of Gear Continuous gear, 5-speed

Operation Left foot

Drive Ratio:

First Gear 14/37 (2.64)

Second Gear 18/32 (1.78)

Third Gear 19/25 (1.32)

Fourth Gear 22/23 (1.05)

Fifth Gear 24/21 (0.88)

Frame:

Type of Frame Semi double cradle Semi double cradle

Front Axle Angle 28° 26.7°

Angle Base 114.4 mm 78.33 mm

Tyres:

Type With inner tube With inner tube

Front 90/90-21 54S 100/80-17 52S

Rear 120/80-18 62S 130/70-17 62S

Pressure with Cold Wheels:

Front 0~90kg 1.8 bars (26.1 psi)

Rear 0~90kg 1.9 bars (27.6 psi)

Front 90~178kg 2.0 bars (29.0 psi)

Rear 90~178kg 2.1 bars (30.5 psi)

Model XT 125R XT 125X

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