RIEJU MRX 125 Manual
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RIEJU MRX 125 Manual

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RIEJU S.A. is very grateful for the trust you have placed in our company and congratulates you on your
excellent choice.
The Model MRX – SMX 125 is the result of long RIEJU experience developing a highly-reliable, multi-pur-
pose vehicle.
The purpose of this Owners Manual is to indicate how to use and maintain your vehicle, please carefully
read the information and instructions that it contains.
We would remind you that a vehicle's life depends the use and maintenance you provide it with, keeping
it in perfect running order will reduce repair costs.
This manual should be considered as an integral part of the motorbike and as such, should remain in the
basic equipment, including the case of change of ownership.
For any quer y, please consult a RIEJU dealer, who will assist you ate all times.
Remember that to guarantee correct operation of your motorbike, original psare parts parts should
always be employed.
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Summary of Contents for RIEJU MRX 125

  • Page 1 RIEJU S.A. is very grateful for the trust you have placed in our company and congratulates you on your excellent choice. The Model MRX – SMX 125 is the result of long RIEJU experience developing a highly-reliable, multi-pur- pose vehicle.

  • Page 2: Table Of Contents

    CONTENTS Page Page Motorbike description ....4 Checks before starting-up ....14 Motorbike identification .
  • Page 3 Page Page Front suspension ....21 Technical specifications and characteristics . .31 Rear suspension .....21 Sparkplug checks .

  • Page 4: Motorbike Description

    MOTORBIKE DESCRIPTION This motorbike incorporates a YAMAHA single-cylinder, 4-stroke, air-cooled, electrical starting engine. Engine size is 123,7 cubic centimetres, with a 54 mm piston diameter and 54 mm travel. Ignition uses an ac magneto generator. Multiple steel disc in oil bath clutch. The engine is fixed to a perimeter-type chassis, made of high-strength rectangular section tubing, with conical steering bearings.

  • Page 5: Motorbike Identification

    MOTORBIKE IDENTIFICATION Your motorbike’s identification number is engraved on the chassis. The number engraved on the right-hand section of the ste- ering pipe will be used by us for all purposes (specifica- tions certificate, insurance and licence number etc), and should be included in any suggestion or complaint, and also when ordering spare parts.

  • Page 6: Main Motorbike Components

    MAIN MOTORBIKE COMPONENTS KEYS This model is supplied with a set of keys for the ignition contact switch. These keys are joined to a tab, which is engraved with the corresponding serial number. It is recommended that this is kept in a safe place so that the number is at hand if the keys are ever lost.
  • Page 7 7. Indicator lights This indicator comes on when the indicator lights are operated. 8. Rev counter This indicates the number of engine revolutions per minute.

  • Page 8: Handlebar Switches

    HANDLEBAR SWITCHES 1. Indicator switch This has three positions: In the central posi- tion the indicators are switched off, when turned to the right the right-hand indicators are switched on, and when turned to the left, the left-hand indicators come on. Note that the switch will automatically return to the central position.
  • Page 9 5. Ignition switch This switch is used to start the engine, after verifying that the gear-change pedal is in the neutral position. 6. Light switch The light switch should be set to the upper position to turn on the headlight, pilot lamp and instrument panel.

  • Page 10: Clutch Lever

    CLUTCH LEVER The clutch lever is located on the left-hand side of the handlebar. To engage the clutch, the lever should be pressed towards the grip or handlebar. FRONT BRAKE LEVER The front brake lever is located on the right-hand side of the handlebar. This brake is operated by pres- sing the lever towards the handlebar.

  • Page 11: Battery

    BATTERY The seat has to be removed in order to reach the battery, this is accomplished by loosening the screw under the rear mudguard and pulling the seat backwards. The terminal block should be checked, together with the actual terminals themselves. If any oxide is observed on the terminal block or the ends of the terminals, this should be cleaned off with a metal bristle brush, sandpaper or similar.

  • Page 12: Petrol Tank

    PETROL TANK To access the petrol tank, open the filling cap by turning it in an anticlockwise direction. Only oil-free petrol should be used. The fuel tank capacity is 7.4 litres. REMEMBER: unleaded petrol must always be used. CHOKE CONTROL The choke control is underneath the fuel tank, next to the carburet- tor on the left side.

  • Page 13: Petrol Tap

    PETROL TAP The petrol tap is on the left, under the fuel tank. It has three positions: OFF: Fuel supply is cut-off in this position. The control should be set to this position when the engine is not running. ON: Fuel is supplied to the carburettor in this position. Normal driving is performed with the lever in this position.

  • Page 14: Checks Before Starting-Up

    CHECKS TO BE CARRIED OUT BEFORE OPERATING The following should be checked before using your motorbike: Items to check Checks Lights and indicators Check for correct operation Speedometer cable Check for smooth operation and lubrication Front and rear brakes Check both free-play and operation Accelerator grip Check free-play, adjust and lubricate as necessar y Petrol tank...

  • Page 15: Routine Checks

    ROUTINE CHECKS Brake liquid level FRONT BRAKE The front brake consists of a 260 mm dia- meter disc brake, which is operated by means of a double-piston floating clip and hydraulic pump. The braking surface should be free from both grease and dirt to ensure perfect ope- ration.

  • Page 16: Rear Brake

    If the hydraulic clip brake pads are worn, they must be replaced. The minimum thickness of the Ferodo pads is 2 mm. Please remember that these operations should be carried out by an official RIEJU ser- vice centre.

  • Page 17: Accelerator Grip

    A C C E L E R ATOR GRIP Check for correct operation by rotating the grip and verifying correct fre e - p l a y. The grip should firmly re t u rn when the accelerator is re l e a s e d . LIGHTS AND INDICAT O R S Check that all headlights, road lights, indicator lights, rear lights and indicator lamps operate...

  • Page 18: Engine Starting And Operation

    ENGINE STARTING AND OPERATION It is very important that you have full knowledge of your motorbike and how it works. WARNING: The engine should never be left running in an enclosed space because the toxic exhaust fumes could have serious consequences on your health. STARTING THE ENGINE Open the petrol tap.

  • Page 19: Running-In

    RUNNING-IN The most important part of your motorbike’s life occurs between 0 and 500 kilometres. For this reason, we recommend that you carefully read the following instructions. During the first 500 kilometres, you should not overload your motorbike since the engine is new and the various component parts have to mutually wear down and polish themselves until perfect running order is achieved.

  • Page 20: Stopping

    This is one of the most important components with respect to good engine performance because this is where petrol and air are mixed, poor carburettor operation means poor engine performance, which in turn, could lead to damaged engine parts. It is, therefore recommended that its adjustment is checked at an authorised RIEJU workshop.

  • Page 21: Front Suspension

    FRONT SUSPENSION The front suspension, which is one of the most advanced parts with regards to technology and design, consists of a telescopic hydraulic fork with 36 mm diameter bars. Ø. Oil capacity: 265 c.c. per bar. Recommended type of oil: CASTROL SAE 15W. REAR SUSPENSION The rear suspension consists of a rectangular tube swin- garm anchored to a single hydraulic shock-absorber by...

  • Page 22: Sparkplug Checks

    SPARKPLUG INSPECTION The sparkplug is a very important engine component and is easy to inspect. It should be removed and inspected on a regular basis because heating and soot deposits will slowly deteriorate it. If the electrode is excessively eroded or there are heavy soot or other deposits, then the sparkplug should be replaced using a recommended spare part.

  • Page 23: Air Filter

    AIR FILTER Correct operation and lifetime of the engine components, piston rod, piston, segments, crankshaft bea- rings and the cylinder, largely depend on the air filter’s state of cleanliness. In order to access the air filter, the right side cover should be removed by means of the two screws hol- ding it to the chassis.
  • Page 24 The filter foam may then be separated from its plastic support and cleaned with a specific filter foam cleaning solvent. Once it has thoroughly dried, the filter may be reinstalled by follo- wing the above instructions in the reverse order after prior lubri- cation of the filter with special purpose filter oil.

  • Page 25: Transmission Chain Tensioning And Lubrication

    TRANSMISSION CHAIN TENSIONING AND LUBRICATION Models MRX – MSX 125 are special because they are fitted with chain tensioning mechanisms which always maintains the chain at the correct tension. The chain tension can be adjusted by means of eccentric mechanisms mounted on the rear wheel axle, always operating at the point of maximum chain tension.
  • Page 26 The chain must not be over-tensioned since this could lead to engine and transmission damage, the ten- sion should be maintained within the limits specified on the associated drawings. At the same time, the wheel should be perfectly centred and aligned. For this purpose the eccentric mecha- nism slots may be employed to leave the two in the same position on both sides of the swingarm.

  • Page 27: Lubrication And Greasing

    LUBRICATION Engine lubrication uses an oil pump which is located inside the oil sump. The gearbox and clutch use the same oil and the recommended type is CASTROL SAE 20W-50, with a total capacity of 1.2 litres. The oil sump may be drained using the drain screw located at the lower left of the engine.

  • Page 28: Cleaning And Storage

    WARNING: Rieju cannot be held responsible for the use of degreasing agents which stain and/or cause deterioration the the motorbike components. Rieju cannot be held responsible for any possible damage resulting from the use of pressurised water to clean the motorbike.
  • Page 29 4. Once all dirt has been cleaned off, the surfaces should be washed warm water and mild detergent soap. Difficult areas to access can be washed with a bottle-brush or similar. 5. Rinse immediately with cold water and dry all surfaces. 6.

  • Page 30: Maintenance Operations

    1ª REVISION 2ª REVISION REV. EACH MAINTENANCE OPERATIONS 1.000 KMS. 3.000 KMS. 5.000 KMS. · · · Brake system checks. Exchange · Exchange Transmission oil level checks. · · · Chain tension and wear checks. · · Suspensions checks. Check, adjust and lubricate controls and cables. ·...
  • Page 31 TECHNICAL SPECIFICATIONS AND CHARACTERISTICS Model Dimensions: Total length 2020 mm. 1940 mm. Total width 800 mm. 800 mm. Total height 1180 mm. 1135 mm. Seat height 900 mm. 900 mm. Distance between axles 1335 mm. 1335 mm. Minimum distance to ground 315 mm.
  • Page 32 Transmission oil CASTROL SAE 20W-50 Type API, “SH” o superior Amount 1,2 Litre Air filter Foam rubber humid type Fuel Type Unleaded gasoline 7,4 Litre Tank capacity Mikuni / VM 20 Carburettor Sparkplug CR7HSA / NGK o U22FSR-U / DENSO Type 0,6 - 0,7 mm Electrode separation...
  • Page 33 GEAR CHANGE Speed Primary shaft Secondary shaft Gear ratio Output ratio 1ª Z = 14 Z = 37 1 : 2,64 1 : 9,42 2ª Z = 18 Z = 32 1 : 1,78 1 : 6,35 3ª Z = 19 Z = 25 1 : 1,32 1 : 4,71...
  • Page 34 Tyres: MRX Metzeler 90/90-21” 54S with chamber Front Metzeler 120/80-18” 62S with chamber Rear Tyres: SMX P i relli 100/80-17” 52T Sport Demon with chamber Front P i relli 130/70-17” 62T Sport Demon with chamber Rear Electrical equipment Ignition system C.D.I.

This manual is also suitable for:

Smx 125

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