Yamaha YJ125T SPECIFICATIONS

SPECIFICATIONS

Dimensions:

Overall length:

1,755 mm (69.1 in) Overall width:

699 mm (27.5 in) Overall height:

1,063 mm (41.8 in) Seat height:

759 mm (29.8 in) Wheel base:

1,230 mm (48.4 in) Ground clearance:

95 mm (3.8 in) Minimum turning radius:

1,800 mm (72 in)

Weight:

with oil and full fuel tank: 109 kg (240 lb)

Engine:

Engine type

Air-cooled 4-stroke, SOHC Cylinder arrangement:

Forward-inclined single cylinder Displacement:

8125 cm3 Bore Stroke

51.5⋅60.0 mm (2.0⋅2.4 in) Compression ratio:

9.8:1 Starting system:

Electric / kick starter Lubrication system:

Wet sump

Oil type or grade

Engine oil

Type

-20˚ -10˚ 0˚ 10˚ 20˚ 30˚ 40˚ 50˚

SAE 10W-30

SAE 10W-40

SAE 20W-40

SAE 20W-50

ZAUM00**

Recommended engine oil classification API Service SE, SF type or higher

Final gear oil

Type

SAE 85 W 140

Oil quantity

Engine oil

Periodic oil change

1.0L (1.09 US qt, 0.92 lmp.qt) Total amount

1.2L (1.31 US qt, 1.10 lmp.qt)

Final gear case oil

Periodic oil change

0.13L

Total amount

0.15L

Air filter

Paper type element

Fuel

Type

Regular unleaded gasoline(91 or higher) Fuel tank capacity

4.5L (1.18 US qt, 0.98 lmp.gal)

Carburetor

Type⋅quantity BS26⋅1 Manufacturer

Mikuni

Spark plug

Type / Manufacturer CR7E / NGK

Gap

0.7~ 0.8 mm (0.028 ~ 0.032 in)

Transmission

Primary reduction system Helical gear

Primary reduction ratio 40/15(2.666)

Secondary reduction system Spur gear

Secondary reduction ratio 38/13(2.923)

Transmission type

Single speed automatic(V-belt type) Operation

Centrifugal automatic type

Chassis

Frame type

Steel tube underbone Caster angle

32°

Trail

75 mm

8-1

Contents

LIT-11626-18-39 5YR-F8199-11 Page INTRODUCTION IMPORTANT MANUAL INFORMATION The Safety Alert Symbol means ATTENTION! BECOME ALERT!YOUR SAFETY IS INVOLVED Failure to follow WARNING instructions could result in severe injury or death NOTE: AFFIX DEALER LABEL HERE Ignition circuit cut-offsystem Replacing the tail/brake light Further safe-ridingpoints bulb Location of important labels Tires Cast wheels Adjusting the brake lever free Adjusting the rear brake lever free play Q SAFETY INFORMATION HE OR SHE SHOULD: 8 OBSERVE THE WARNINGS AND MAINTENANCE REQUIRE- MENTS IN THE OWNER’S MANUAL 8 OBTAIN QUALIFIED TRAINING IN SAFE AND PROPER RIDING TECHNIQUES Safe riding 8 The posture of the operator and passenger is important for proper control rests 8Never ride under the influence of alcohol or other drugs Protective apparel 8Always wear an approved helmet Loading Accessories 9Certain accessories can Gasoline and exhaust gas 8 GASOLINE IS HIGHLY FLAM- MABLE: 9Always turn the engine off when refueling 9Never refuel while smoking or in the vicinity of an open flame 8Never start the engine or let it run for any length of time in a closed Further safe-ridingpoints Location of important labels Page Left view Right view Controls and instruments Main switch/steering lock Indicator lights Handlebar switches Speedometer unit Fuel gauge Front brake lever Rear brake lever Fuel tank cap Fuel Catalytic converter KickstarterSeat OPEN Helmet holder Storage compartment Luggage hook Carrier Sidestand Ignition circuit cut-offsystem Does the engine start NO YES YES NO Does the engine stall The system is OK. The scooter can be ridden PRE-OPERATIONCHECKS Pre-operationcheck list Page Starting a cold engine Starting off Acceleration and deceleration Braking Engine break-in Parking PERIODIC MAINTENANCE Owner’s tool kit Periodic maintenance chart for the emission control system General maintenance and lubrication chart Page Page Removing and installing panels Checking the spark plug Air filter and V-beltcase air filter elements Cleaning the V-beltcase air filter ele ment filter case erated without the air filter ele ment installed, otherwise the Page Replacing the tail/brake light bulb Replacing a turn signal light bulb Checking the front brake pads and rear brake shoes Checking the brake fluid level Changing the brake fluid Checking and lubricating the cables Checking and lubricating the Lubricating the front and rear throttle grip and cable brake levers To check the condition To check the operation Checking the steering Replacing the headlight bulb Final transmission oil 8Make sure that no foreign mate- rial enters the final transmission case 8Make sure that no oil gets on the tire or wheel Adjusting the carburetor Adjusting the throttle cable free play Tires Tire inspection Minimum tire tread depth (front and rear): 0.8 mm (0.03 in) Tire information This scooter is equipped with cast wheels and tubeless tires with valves Cast wheels Adjusting the brake lever free Adjusting the rear brake lever play free play Battery Replacing the fuse Engine oil and oil strainer To change the engine oil and clean the oil strainer Troubleshooting Troubleshooting chart Care After riding in the rain, near the sea or on salt-sprayedroads Salt sprayed on roads in the winter may remain well into spring Do not use warm water since it increases the corrosive action of the salt Apply a corrosion protection spray on all metal, including chrome- and After cleaning Storage Make any necessary repairs before storing the scooter SPECIFICATIONS Page Identification numbers Model label Reporting safety defects Motorcycle noise regulation YAMAHA MOTOR CORPORATION, U.S.A STREET AND ENDURO MOTORCYCLE LIMITED WARRANTY Page YAMAHA EXTENDED SERVICE (Y.E.S.)