RIEJU MRT 125 AC EURO 4 User manual

MRT 125 AC
EURO 4
MANUEL DE PROPRIEÉTAIRE
OWNER’S MANUAL
MANUAL DEL PROPIETARIO

…for everyday adventure
Marathon 125 AC 3
RIEJU S.A. is grateful for the confidence you have put in their company and would like to
congratulate you on your choice of mortorbike.
The MRT 125c.c. AC EURO 4are the resulted of the long-term experience that RIEJU has had in
competitions, which has led to the development of a high performance vehicle.
The objective of this owner ’s manual is to denote the use and maintenance of your vehicle, we ask you to
read the instructions and information that follow carefully.
We wish to remind you that the life of the vehicle depends on how it is maintained. Maintaining the vehicle
in perfect working condition reduces the cost of repair.
This manual has to be considered as an integrate component of the mortorbike and must remain part of the
basic equipment, and handed over in the event of a change of vehicle ownership.
In the event of any problems, please consult the RIEJU dealer who will assist you or check our web
www.riejumoto.com.
Please remember that for your mortorbike to perform correctly, you should always fit original spare parts

…for everyday adventure
Marathon 125 AC 4
CONTENTS
MOTORBIKE DESCRIPTION 6
DELIVERY OF THE MOTORCYCLE 7
IDENTIFICATION OF THE MOTORBIKE 9
ENGINE IDENTIFICATION NUMBER 9
MAIN ELEMENTS OF THE MOTORBIKE 11
KEYS 11
HANDLE BAR SWITCHES 11
Indicator Switch 11
Horn button 11
Main and dip beam light switch 12
Cold start (CHOKE) 12
CLUTCH LEVER 13
FRONT BRAKE LEVER 13
REAR BRAKE PEDAL 13
GEAR BOX PEDAL 14
PETROL TANK 14
PETROL TAP 15
ROUTINE TESTING 16
Front brake 16
Rear brake 16
Brake fluid level and brake pad wear 16
Throttle twist grip 16
Lights, indicators and warning lamps 16
Start switch 16
Tyres 17
INSTRUMENT AND INDICATORS 18
Speedometer (Kmh and Mph) 18
Out of gear (Neutral) indicator 18
Temperature warning lamp 18
Headlight Main beam warning light 19
Direction indicator warning lamp 19
Engine warning lamp 19
INSTRUMENT DESCRIPTION 20
ADJUST BUTTON FUNCTION INSTRUCTION 20

…for everyday adventure
Marathon 125 AC 5
SELECTION MILES 20
USE OF TRIP 21
TOTAL HOUR 21
HOUR METER 21
SELECT BUTTON FUNCTION INSTRUCTION 22
12 / 24 HOURS MODE 22
STOPWATCH 22
SPEED RECORD 24
TO ENTER THE SETTING MODE 25
CIRCUMFERENCE AND SENSOR POINT 26
WHEEL DIAMETER AND PULSES 27
CLOCK SETTINGS 27
MOTORBIKE OPERATION 28
STARTING AND RIDING 28
RUNNING IN 29
ACCELERATION 29
TO BRAKE (SLOWING DOWN) 30
STOPPING 30
GEAR BOX PEDAL 30
CARBURETTOR 31
BATTERY (CHECKING THE BATTERY) 31
FRONT SUSPENSION 32
REAR SUSPENSION 32
COOLING SYSTEM 34
SPARK PLUG CHECK 34
CHECKING & FILLING THE ENGINE OIL LEVEL 34
CHAIN ADJUSTMENT AND TENSION 35
AIR FILTER 36
CLEANING AND STORAGE 38
CLEANING 38
LONG-TIME STORAGE 39
CHECKS BEFORE USING MOTORCYCLE 40
TECHNICAL SPECIFICATIONS & CHARACTERISTICS 41
MAINTENANCE 43

…for everyday adventure
Marathon 125 AC
MOTORBIKE DESCRIPTION
This motorbike has a 125c.c. single cylinder; liquid cooled four stroke motor. With a piston diameter of 52,4
mm and it has a 57,8 mm bore.
The motor has an electronic Ignition system, CDI and a high-tension coil. The Generator provides 140 Watts
and 12 volts via a regulator to supply power for the bike electrics.
Engine power is delivered to final drive chain via a Multiple metal clutch with constant pressure springs,
submerged in an oil bath.
The engine is anchored to a highly resistant perimeter type chassis, with tapered steering bearings.
The front suspension in the MRT 125 consists of a hydraulic fork with bars, The rear suspension consists of a
shock absorber anchored to a progressive articulated rod system (
The front suspension consists of a hydraulic fork with 37 mm of diameter. The rear suspension consists of a
mechanical hydraulic shock absorber that provides great smooth operation.
The front and rear brakes are disc and 260 mm stainless steel on the front wheel and 200 mm. at the rear
wheel
6

…for everyday adventure
Marathon 125 AC 7
DELIVERY OF THE MOTORCYCLE (PRE DELIVERY INSPECTION & HANDOVER)
USER MANUAL – very important this explains in detail the essential functions of the motorcycle, safe use and
important maintenance practices.
WARRANTY REGISTRATION – complete the necessary information, pass a copy to the owner, and return a
copy immediately to your RIEJU distributor.
OPERATION - Explain the functions & correct handling of the motorcycle.
WARNINGS - Explain the importance of warning labels to ensure a long life of the motorcycle.
KEYS - Deliver the full set and recommend making a note of the key item reference.
FIRST SERVICE - Explain the importance of the service at 500 km and the ongoing service schedule.
PERIODIC MAINTENANCE - Explain the need of the periodic maintenance and indicates that don’t do the
correct maintenance and services indicates can be cause to loose the warranty.

…for everyday adventure
Marathon 125 AC 8
DELIVERY OF THE MOTORCYCLE (PRE DELIVERY INSPECTION & HANDOVER)
ADJUSTMENTS :
MIRRORS - Set to the correct position for the user.
CLUTCH LEVER - Adjust to suit.
REAR BRAKE LEVER ADJUSTMENT - Adjust to the correct height for the user.
GEAR LEVER ADJUSTMENT- Adjust to the correct height for the user.
WARNING:Changes on the bike don’t authorized by RIEJU, or use of parts that don’t are
ORIGINAL SPARE PARTS from RIEJU on the warranty period. Release RIEJU from any responsibility
on the damages produce on the bike and cancel the warranty.

…for everyday adventure
Marathon 125 AC 9
IDENTIFICATION OF THE MOTORBIKE
On the chassis you will find your motorbike's identification
number engraved .
The number is stamped on the right hand side of the front frame
(Steering head.) is unique to every machine. This number is
required to register your vehicle, this chassis or VIN number
should be quoted when requesting warranty assistance or
genuine Rieju spare parts.
ENGINE IDENTIFICATION NUMBER
The engine serial number is located on the top, left side bottom of
the left crankcase.
The engine number will serve as a reference when requesting
spare parts from the dealership.

…for everyday adventure
Marathon 125 AC 10
Back brake
Periodically check the level of the brake fluid in the reservoir
located on the top of the master cylinder of the rear brake and
under the rear right panel, to recharge.
ATTENTION: If the tank is empty, contact your official RIEJU
dealer
Brake fluid level and wear of brake pads
Check that the brake fluid level is correct, otherwise check
the brake pads for wear. If the pad material is less than 2
mm thick, the pads should be replaced. If the pads are not
worn, fill the brake reservoir with brake fluid.
ATTENTION: The brake fluid is corrosive and will damage
the paint, if it is spilled, immediately wash it with water.

…for everyday adventure
Marathon 125 AC 11
MAIN ELEMENTS OF THE MOTORBIKE
KEYS
With this model, you will be given a set of keys, which are used
for the Ignition switch/Steering lock.
HANDLE BAR SWITCHES
1.-INDICATOR SWITCH
This has 3 positions: in the centre position it is deactivated, to
indicate right it must be moved to the right and to indicate left it
must be moved to the left.
NOTE: Note that the button always returns to the central
position, to switch off the direction indicators push button.
2.- Horn Button
Press the button to activate the horn
1 3
2
4

…for everyday adventure
Marathon 125 AC
4.- Cold Start (choke)
When the engine is cold it is necessary to actuate The starter
to start the vehicle. This one is located in left handled bar
switch (fig. 4)
WARNING:Once the motor has reached it ’s normal
working temperature, return the choke lever go back
to it ’s original position, otherwise it could cause the
motor to misfire.
12
3.-Main and dip beam light switch
This switch has two positions: when it’s down the dip beam is on and in the upper position the main beam is
illuminated.
This model incorporates a bulb of 12V 35/35W H4 for light of main and dip beam and of 12V 5W for position
light.
CAUTION:Use other type of bulb or change of power of it can cause damages on the optics of the
vehicle. This type of fault is exempt from warranty.
1 3
2
4

…for everyday adventure
Marathon 125 AC 13
CLUTCH LEVER
The clutch lever is situated on the left-hand side of the
handlebar. To activate it, pull the lever towards the grip or
handlebar.
FRONT BRAKE LEVER
The front brake lever is situated on the right-hand side of the
handlebar. To activate the front brake, pull the lever towards the
handlebar.
REAR BRAKE PEDAL
The rear brake pedal is on the right-hand side of the motorbike.
To activate it, press downwards with the food.

…for everyday adventure
Marathon 125 AC 14
GEAR BOX PEDAL
This is situated underneath the left part of the motor, it is
activated with the foot taking it all the way and then letting it go
back to its’ original position before changing gear again. To put
the motorbike into first gear, the pedal has to be pressed
downwards. To change the other gears, lift the lever upwards
with the toe.
PETROL TANK
To get to the tank, open it using the stop- per of the tank,
turning it anti-clockwise.
The capacity of the tank is 6 litters.
CAUTION: Use only Unleaded petrol E5, without oil, the use
of another type of fuel can damage the engine and this
damages will not be considered as warranty.

…for everyday adventure
Marathon 125 AC 15
PETROL TAP
The petrol tap is situated on the left-hand side of the vehicle,
under the fuel tank. It has three positions :
OFF: With the lever in this position, the fuel will not go through.
Put the lever in this position when the motor is not running
when parked and garaged.
ON: With the lever in this position, the fuel goes to the
carburettor. Normal driving is done with the lever in this
position.
RES: this position is RESERVE. If you run out of fuel while you are
driving with the lever in the "ON" position, turn the lever to this
position. Fill the tank as soon as possible, then it is important to
remember to turn the lever back to "ON“.
TIP: Do not drive normally in RESERVE position as you could
run out of petrol.

…for everyday adventure
Marathon 125 AC 16
Throttle twist grip (1)
Ensure it works correctly, by turning the grip and verifying if the
free play is correct. The grip should return to closed position
when released.
Lights, indicators and warning lamps
Check operation of all lights, and direction indicators plus the oil
warning lamp and petrol reserve panel lights. Replace bulbs as
necessary.
Start switch (2)
This switch is used to start the engine, after verifying that the
gear-change pedal is in the neutral position.
1
2

…for everyday adventure
Marathon 125 AC 17
Tyres
The tyre pressure directly effect the road holding ride comfort
and braking distance, the, therefore check the tyre pressures
regularly for your own safety.
ADVICE: Make sure that the rim is central and not
damaged, as well as the wear on the tyres. Do not
overload the vehicle as this will effect stability, and
increases tyre wear.
CAUTION: when the pressure is very high, the tyres can no
longer absorb any shocks, transmitting any road sur- face
defects directly to the chassis, handlebar and rider.
TYRE FRONT REAR
Off-road 1,7 Kg/Cm2 1,8 Kg/Cm2
Super
Motard 2,2 Kg/Cm2 2,4 Kg/Cm2
PRESSURES

…for everyday adventure
Marathon 125 AC 18
INSTRUMENT AND INDICATORS
1.- Speedometer (Kmh and Mph)
2.- Out of gear (Neutral) indicator ( )
This light comes on when the gear change lever is in the neutral
(N) position, that is to say, out of gear.
3.- Temperature warning lamp ( )
This light is very important as it can tell us if there is an
excessive increase in engine running temperature due to an
engine fault or a low level of cooling liquid in the radiator.
ATTENTION: Do not use the bike with this warning light on,
as this may cause serious damage to the engine, consult
your RIEJU dealer as soon as possible.
21
3

…for everyday adventure
Marathon 125 AC 19
4.- Headlight Main beam warning light ( )
This indicator comes on when the headlights are on main beam.
5.- Direction indicator warning lamp ( )
This indicator comes on when we activate the direction
indicators.
6.- Engine warning lamp ( )
This indicator comes on when on fail is detected on the engine.
ATTENTION: Do not use the bike with this warning light on,
as this may cause serious damage to the engine, consult
your RIEJU dealer as soon as possible.
64
5

…for everyday adventure
Marathon 125 AC 20
Speedometer
■Display unit: Km/h or MPH.
Indicator lights
oHigh beam light ( )
oDirection light ( )
oEngine alarm ( )
oNeutral light ( )
oTemperature ( )
oClock: 12/24 MODE
oStopwatch: According to setup
distance to record the testing time.
oSpeed Log: Average speed and
max speed record
Select button
oPress the Select button in the main
screen to switch between 12/24 hour
mode, speedometer record, topwatch,
and MAX record.
Adjust Button
oPress the Adjust button in the main
screen to switch between ODO, TripA/B,
Total Hour meter, Hour meter A/B.
oPress and hold the Adjust button for 3
seconds in Trip A/B screen to reset.
oPress and hold the Adjust button for 3
seconds in Hour metter A/B screen to
reset
Odo meter
oDisplay range 0-99999 Km (mile)
oDisplay unit: 1 Km (mile) Trip meter
oDisplay range 0-9999,9 Km (mile)
oDisplay Unit 0,1 Km (mile)
oVolt Meter: Display
range 4 levels
INSTRUMENT DESCRIPTION