for choosing one of its products. We have prepared this manual to help you to get the very best from your vehicle. Please read it carefully before riding
the vehicle for the first time. It contains information, tips and precautions for using your vehicle. It also describes features, details and devices to assure
you that you have made the right choice. We believe that if you follow our suggestions, you will soon get to know your new scooter and it will serve you
well for a long time to come. This booklet forms an integral part of the vehicle; should the vehicle be sold, it must be transferred to the new owner.
Do you have a question about the Runner 125 and is the answer not in the manual?
Questions and answers
Zsean
March 20, 2025
It starts but won't rev up properly
1 comments:
Mr. Anderson
March 20, 2025
The Gilera Runner 125 does not rev up properly after starting due to a possible issue with the carburetor or a more serious engine problem. The document mentions that the engine "bogs out badly," which could indicate a fuel delivery issue, such as a clogged carburetor. Additionally, there is a large hole in the exhaust that has been temporarily covered with tinfoil, which could also affect engine performance by disrupting proper exhaust flow.
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GILERA WOULD LIKE TO THANK YOU for choosing one of its products. We have prepared this manual to help you to get the very best from your vehicle. Please read it carefully before riding the vehicle for the first time. It contains information, tips and precautions for using your vehicle. It also describes features, details and devices to assure you that you have made the right choice.
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The instructions given in this manual are intended to provide a clear, simple guide to using your vehicle; this booklet also details routine maintenance procedures and regular checks that should be carried out on the vehicle at an authorised Dealer or Service Centre. The booklet also contains instructions for simple repairs.
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Personal safety Failure to completely observe these instructions will result in serious risk of personal injury. Safeguarding the environment Sections marked with this symbol indicate the correct use of the vehicle to prevent dam- aging the environment. Vehicle intactness The incomplete or non-observance of these regulations leads to the risk of serious damage to the vehicle and sometimes even the invalidity of the guarantee.
A = Rear brake control; B = Turn indicator switch; C = Horn button; D = Lights switch; E = Instrument panel; F = Ignition switch; G = Starter button; H = Accelerator command; I = Front brake command; Instruments (01_02)
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01_02 A= High beam warning light; B= Engine oil pressure warning light; C= Turn indicator warning light; D= Low fuel warning light; E= Coolant temperature too hot warning light; F= Immobiliser warning light; G= Digital display; H= Rpm indicator;...
C= Digital clock; D= Speedometer; E= Odometer; F= Partial odometer gauge; G= Maximum speed indicator; Setting the total and trip odometers (01_04) When the "MODE" «A» key is pressed briefly, the following functions are obtained simultaneously: 1. TOTAL ODOMETER - the word "ODO" and "km/h" or "mph" appear (in ac- cordance with the unit of measurement set).
CAUTION IT IS STRONGLY ADVISED NOT TO USE THE FUNCTIONS OF THE DIGITAL DISPLAY PANEL WHILE THE VEHICLE IS MOVING. Setting the hour/minutes function (01_05) To set the clock press the "SET" «B» key for more than three seconds, with the "CLOCK"...
Switch direction indicators (01_07) To switch on the left indicator lights move lever «B» to «1», to switch on the right indicator lights move lever to «2». The lever automatically goes back to the central position and the indicators remain on. To switch of the indicator lights, move lever to «0».
Light switch (01_09) 1 = Low-beam and taillight 2 = High-beam and tail light 01_09 Start-up button (01_10) Press the button «I» to start the engine, after pulling one of the two brake levers 01_10 The immobilizer system In order to enhance theft protection, the vehicle is equipped with a «PIAGGIO IMMO- BILIZER »...
Keys (01_11, 01_12, 01_13) Two types of keys come with the vehicle. The key «A» with a brown grip is the pro- gramming key. Only one is supplied and it serves to memorise the code of the other keys or to allow the dealers to take various measures. For this reason it is advised that it be used only in exceptional circumstances.
Immobilizer device enabled indicator led (01_14) Activation of the «PIAGGIO IMMOBILIZER» system is signalled by a flashing «G» warning light. In order to reduce battery discharge, the indicator LED turns off auto- matically after 48 hours of uninterrupted functioning. Should the system fail, different LED flashing patterns will provide the Authorised Service Centre with information on the type of fault detected.
SHOULD THE VEHICLE CHANGE OWNERS, IT IS ABSOLUTELY NECESSARY THAT THE NEW OWNER GET POSSESSION OF THE KEY WITH THE BROWN GRIP (AS WELL AS ALL OTHER KEYS) AND THE «CODE CARD» Programming the immobilizer system In the following is described the procedure to follow to program the "PIAGGIO IM- MOBILIZER"...
Proper programming check Insert the brown key, disabling the transponder (i.e., by tilting the key hood by 90°), and turn the key to the «ON» position. Perform the engine start-up operation. Ensure that the engine does not start. Insert the red key and start up again. Check that engine starts.
Opening the saddle (01_16) Push the key switch when it is in the «ON» or «OFF» position. 01_16 Identification (01_17, 01_18) The identification numbers consist of a prefix stamped on the chassis and on the en- gine, followed by a number. They must be quoted when ordering spare parts. We recommend that you check that the prefix and chassis number stamped on the vehicle correspond with those in the vehicle documents.
Checks (02_01) Before using the vehicle, check: 1. That there is enough fuel in the fuel tank. 2. That the fluid level for front and rear brakes is correct. 3. That tyres are properly inflated. 4. The correct functioning of daylight running lights, headlamp, turn indicators, stop light and license plate light.
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CAUTION DO NOT BRING NAKED FLAMES OR CIGARETTES NEAR THE MOUTH OF THE FUEL TANK: FIRE HAZARD. ALSO AVOID INHALING HARMFUL VAPOURS. CAUTION 02_03 THE USE OF OILS AND SPARK PLUGS OTHER THAN THOSE RECOMMENDED CAN SHORTEN THE LIFE OF THE ENGINE. CAUTION IF ONLY THE FIRST AND THE LAST SEGMENTS OF THE FUEL LEVEL INDICA- TOR FLASH, CONTACT AN AUTHORISED SERVICE CENTRE TO CHECK THE...
Tyre pressure (02_04) CAUTION TYRE PRESSURE SHOULD BE CHECKED WHEN TYRES ARE COLD.INCOR- RECT TYRE PRESSURE CAUSES ABNORMAL TYRE WEAR AND MAKES RID- ING DANGEROUS. TYRES MUST BE REPLACED WHEN THE TREAD REACHES THE WEAR LIMITS 02_04 SET FORTH BY LAW. TYRES Front tyre Tubeless 120/70 - 14'' 55P...
Running in (02_05) WARNING DURING THE FIRST 1000 KM DO NOT RIDE THE VEHICLE OVER 80% OF ITS MAXIMUM SPEED. AVOID TWISTING THE THROTTLE GRIP FULLY OR KEEP- ING A CONSTANT SPEED ALONG LONG SECTIONS OF ROAD. AFTER THE FIRST 1000 KM, GRADUALLY INCREASE SPEED UNTIL REACHING THE MAX- IMUM PERFORMANCE.
CAUTION DO NOT CARRY OUT THESE OPERATIONS IN CLOSED AREAS SINCE EX- HAUST GASES ARE TOXIC. WARNING THE AUTOMATIC TRANSMISSION MAKES THE REAR WHEEL TURN EVEN WHEN THE THROTTLE IS SLIGHTLY TWISTED. RELEASE THE BRAKE CARE- FULLY AFTER STARTING, AND THEN ACCELERATE GRADUALLY. CAUTION NEVER STRESS THE ENGINE AT LOW TEMPERATURES IN ORDER TO AVOID POSSIBLE DAMAGE.
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engine. As the last operation, remove the spark plug while turning on the starter motor in order to expel any excess fuel; then refit the spark plug and repeat the process from point 1. 2. If the engine overheats.Follow the same sequence of procedures, keeping the throttle slightly open.
Stopping the engine (02_07) Stop acceleration, then turn the key switch "D" to "OFF " to turn off the engine (ex- tractable key). WARNING AFTER A LONG DISTANCE COVERED AT THE MAXIMUM SPEED, DO NOT STOP THE ENGINE IMMEDIATELY, BUT LET IT RUN AT IDLE FOR A FEW SECONDS. 02_07 Catalytic silencer CAUTION...
CAUTION DO NOT SHUT OFF THE ENGINE WHILE THE VEHICLE IS MOVING. UNBURNED FUEL COULD ENTER THE CATALYTIC CONVERTER AND BURN, CAUSING THE CONVERTER TO OVERHEAT AND POSSIBLY DESTROYING IT. Automatic transmission (02_08) To ensure simple, pleasurable riding, the vehicle is equipped with automatic trans- mission with regulator and centrifugal clutch.
Safe driving (02_09) WARNING SOME SIMPLE TIPS ARE PROVIDED BELOW WHICH WILL ENABLE YOU TO USE YOUR VEHICLE ON A DAILY BASIS MORE EASILY AND SAFELY. < 02_09 Your ability and your knowledge of the vehicle form the basis of safe riding. We rec- ommend trying out the vehicle in traffic-free zones to get to know your vehicle completely.
8. Any elaboration that modifies the vehicle's performances, such as tampering with original structural parts is strictly forbidden by law, and renders the vehicle not con- forming to the approved type and therefor dangerous to ride. CAUTION RIDING UNDER THE INFLUENCE OF ALCOHOL, DRUGS OR CERTAIN MEDI- CINES CAN BE EXTREMELY DANGEROUS FOR ONESELF AND FOR OTHERS.
Engine oil level In 4T engines, the engine oil is used to lubricate the distribution elements, the bench bearings and the thermal group. An insufficient quantity of oil can cause serious damage to the engine. In all four-stroke engines, a loss of efficiency in oil perform- ance and consumption should be considered normal.
Warning light (insufficient oil pressure) (03_02) The vehicle is equipped with a warning light "H" that lights up when the key is turned to «ON». However, this light should come off once the engine has been star- ted. If the light comes on while braking, at idle speed or while turning a corner, it is necessary to check the oil level and top it up if required.
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WARNING EXCESSIVE OIL LEVEL AT TOP-UPS CAN LEAD TO SCALE FORMATION AND VEHICLE MALFUNCTION. CAUTION USED OILS CONTAIN SUBSTANCES HARMFUL TO THE ENVIRONMENT. FOR OIL CHANGE, CONTACT AN AUTHORISED SERVICE CENTRE WHICH IS EQUIP- PED TO DISPOSE OF USED OILS IN AN ENVIRONMENTALLY FRIENDLY AND LEGAL WAY.
Hub oil level (03_05, 03_06, 03_07) To check the hub oil level, proceed as follows: 1. Place the vehicle on its stand on a level surface; 2. Unscrew the oil dipstick «A», dry it with a clean rag and then reinsert it, screwing it tightly into place;...
API GL-4 Characteristic Rear hub oil Capacity ~ 150 cm³ Tyres (03_08) CAUTION TYRE PRESSURE SHOULD BE CHECKED WHEN TYRES ARE COLD.INCOR- RECT TYRE PRESSURE CAUSES ABNORMAL TYRE WEAR AND MAKES RID- ING DANGEROUS. TYRES MUST BE REPLACED WHEN THE TREAD REACHES THE WEAR LIMITS 03_08 SET FORTH BY LAW.
Rear tyre Tubeless, 140/60 - 13'' 63P TYRE INFLATION PRESSURE Front tyre pressure 1.8 bar Rear tyre pressure 2.2 bar Spark plug dismantlement (03_09, 03_10, 03_11) Remove one of the two sides of the footrest, unscrewing the four fastening screws, one of which is under the passenger footrest.
CAUTION THE SPARK PLUG MUST BE REMOVED WHEN THE ENGINE IS COLD. USING IGNITION ELECTRONIC CENTRAL UNITS OR SPARK PLUGS OTHER THAN THE TYPES PRESCRIBED (SEE «TECHNICAL DATA» SECTION) CAN CAUSE SERIOUS DAMAGE TO THE ENGINE. Characteristic 03_11 Spark plug CHAMPION RG 4HC - NGK CR 8 EB Spark plug: electrode distance 0.7 mm ÷...
CAUTION IF THE VEHICLE IS USED ON DUSTY ROADS IT IS NECESSARY TO CARRY OUT MAINTENANCE CHECKS OF THE AIR FILTER MORE OFTEN TO AVOID DAM- AGING THE ENGINE. CAUTION IN ORDER NOT TO DAMAGE THE VEHICLE PLASTIC COVERS CONTACT AN AUTHORISED SERVICE CENTRE TO HAVE THE AIR FILTER CLEANED.
To ensure the best functioning of the SAS, take your vehicle to an Authorised Service Centre for maintenance operations, at the intervals indicated in the scheduled main- tenance table. This system requires a filter «A». The filter sponge should be cleaned with water and mild soap, then it should be dried with a cloth and slight blows of compressed air.
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The cooling system fluid must be changed every 2 years. This operation must be carried out by trained technicians, please contact your nearest Dealer or Authorised Service Centre. N.B. SHOULD THE 7th SEGMENT OF THE COOLANT TEMPERATURE INDICATOR COME ON DURING A NON-DEMANDING RIDE, SHUT OFF THE ENGINE AND LET IT COOL DOWN.
STOP. IF THE SEGMENTS KEEP FLASHING, CONTACT AN AUTHORISED SERVICE CENTRE. Recommended products AGIP PERMANENT SPEZIAL Ethylene glycol-based antifreeze fluid with organic inhibition additives. Red, ready to use. ASTM D 3306 - ASTM D 4656 - ASTM D 4985 - CUNA NC 956-16 Checking the brake oil level (03_17, 03_18, 03_19) The brake fluid reservoirs are fitted with a transparent indicator «A»;...
CAUTION THE BRAKING CIRCUIT FLUID IS HIGHLY CORROSIVE. THEREFORE, WHEN TOPPING UP, AVOID LETTING IT COME INTO CONTACT WITH THE PAINTED PARTS OF THE VEHICLE. THE BRAKING CIRCUIT FLUID IS HYGROSCOPIC, THAT IS, IT ABSORBS HUMIDITY FROM THE SURROUNDING AIR. IF MOISTURE CONTAINED IN THE BRAKE FLUID EXCEEDS A CERTAIN VALUE, THIS WILL RESULT IN INEFFICIENT BRAKING.
WARNING USED BATTERIES ARE HARMFUL FOR THE ENVIRONMENT. COLLECTION AND DISPOSAL SHOULD BE CARRIED OUT IN COMPLIANCE WITH REGULA- TIONS IN FORCE. 03_21 Use of a new battery (03_22, 03_23) If refitting or newly installing a battery, it is necessary to pass the positive and negative cables to the sides of the battery and then connect then to the terminals as shown in the diagram.
Long periods of inactivity Battery performance will be poor if the vehicle is not used for a long time. This is the result of the natural phenomenon of battery discharging, and may be due to residual absorption by vehicle components with constant power consumption. Poor battery performance may also be due to environmental conditions and the cleanliness of the poles.
WARNING USED BATTERIES ARE HARMFUL FOR THE ENVIRONMENT. COLLECTION AND DISPOSAL SHOULD BE CARRIED OUT IN COMPLIANCE WITH REGULA- TIONS IN FORCE. Fuses (03_24, 03_25) The electrical system is protected by 4 fuses fitted on the side of the battery. If a fuse blows again after it has been replaced, contact an Authorised Piaggio Service Centre to look for the reason that may have caused the failure.
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FUSE CHART Fuse No. 1 Position on fuse box: 1 Capacity: 20A Protected circuits: System protection main fuse Location: battery compartment Fuse No. 2 Position on fuse box: 2 Capacity: 7.5 A Protected circuits: High and low beam light bulbs. Location: battery compartment Fuse No.
Quantity: 2 Front light group (03_26, 03_27, 03_28) In order to reach the headlamp bulb remove the snap-on Gilera shield, located on the front shield, by inserting the blade of a small screwdriver in the corresponding lateral notch, being careful not to scratch the paint. Then loosen the screw «A» underneath and lift up the front shield centre cover.
03_28 Headlight adjustment (03_29, 03_30) Proceed as follows: 1. Place the vehicle in running order and with the tyres inflated to the prescribed pres- sure, on a flat surface 10 m away from a white screen situated in a shaded area, making sure that the longitudinal axis of the scooter is perpendicular to the screen;...
Front direction indicators (03_31, 03_32) To replace the bulbs of the front indicators, remove the entire light by removing the fixing screw «A», remove the rubber cover «B», and remove the bulb holder «C» from its housing; press the bulb slightly, turn it about 30° and then extract it. Follow the process in reverse order to refit.
Rear optical unit (03_33, 03_34, 03_35, 03_36) To access the rear taillight bulbs, remove the two screws «A», then pull out the entire light and proceed as follows: Daylight running light bulbs (side): Both the bulbholders and the daylight running lights «B» are clipped on the their re- spective supports, it is therefore sufficient to remove the bulbholder from the head- lamp, remove the bulb, and replace it with a new one.
03_36 Rear turn indicators (03_37) Unscrew the screw «A» on the back of the turn indicator and remove the protective glass. Hold the bulb gently and make a 30º anticlockwise turn; then remove it from the support and replace it. 03_37...
Rear-view mirrors (03_38, 03_39) The mirrors can be set to the desired position by adjusting the mirror frame. 03_38 The mirrors must be adjusted so that the shafts are perpendicular to the vehicle's direction axis. To adjust the mirror angle, remove the rubber cap «A», loosen the screw «B» located at the base of the stem and tighten it once the desired position is achieved.
CAUTION WHEN ADJUSTING IDLE SPEED, PAY SPECIAL ATTENTION NOT TO TOUCH THE CATALYTIC MUFFLER TO AVOID BURNS. WARNING 03_41 ADJUST IDLE SPEED WHEN THE ENGINE IS FAIRLY HOT AND HAS BEEN RUNNING FOR AT LEAST FIVE MINUTES. BEFORE THIS OPERATION, MAKE SURE THAT THE THROTTLE GRIP HAS THE RECOMMENDED BACKLASH.
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WARNING IT IS NECESSARY TO CHECK BRAKE PAD WEAR AS DESCRIBED ON SCHED- ULE MAINTENANCE TABLE. IF THE THICKNESS OF ONE OR BOTH PADS IS IN THE REGION OF 1.5 MM, BOTH PADS MUST BE CHANGED. IT IS RECOMMEN- DED TO CARRY OUT THIS OPERATION AT AN AUTHORISED SERVICE CENTRE AS SOON AS POSSIBLE.
Puncture (03_45) The vehicle is equipped with Tubeless tyres. When there is a puncture, Tubeless tyres -unlike balloon tyres- go flat very slowly. This offers greater riding safety. A tyre that goes flat very slowly can be repaired with an "INFLATE AND REPAIR" spray. Tyres should be later fully repaired or replaced at an Authorised Service Centre.
Cleaning the vehicle Use a low pressure jet of water to soften the caked dirt and mud deposited on the painted surfaces. Once softened, mud and dirt should be removed with a soft sponge for bodywork soaked in water and "shampoo" (2-4% of shampoo in water). Then rinse abundantly with water, and dry with a shammy cloth.
• DO NOT DIRECT THE JETS DIRECTLY TO CARBURETTOR, WIRINGS, SLOT DIFFUSERS ON THE TRANSMISSION COVER AND SCROLL COVER. CAUTION AVOID USING ALCOHOL OR DETERGENTS WITH SIMILAR AGENTS TO CLEAN THE INSTRUMENT PANEL AND THE LIGHTING ASSEMBLIES. WARNING USE AN ANTISTATIC CLOTH TO CLEAN THE DISPLAY AREA ON THE CON- TROL PANEL.
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As a final step, replace the battery with a new one. IGNITION PROBLEMS No spark from spark plug. Due to Check that the electrodes are the presence of high voltage, this properly adjusted (0.7÷ 0.8 mm). check should only be carried out by Check that the electrodes are an expert.
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INSUFFICIENT BRAKING Greasy disc. Worn pads. Contact an Authorised Service Centre. Air in the brake assembly. Contact an Authorised Service Centre. INEFFICIENT SUSPENSION Oil leak; worn limit switch bumpers; Contact an Authorised Service worn shock absorber attachment Centre points AUTOMATIC TRANSMISSION PROBLEMS Deteriorated roller housing or belt.
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STAND DOES NOT RETURN TO POSITION Presence of dirt Clean and grease STARTER LEVER DOES NOT RETURN TO CORRECT POSITION Presence of dirt Clean and grease...
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VEHICLE SPECIFICATIONS Chassis Modular double cradle frame made of welded tubular steel with sheet metal reinforcement. Max. length 1880 mm Maximum width 720 mm Wheelbase 1340 mm Maximum height 1350 mm Kerb weight 137 ± 5 kg Maximum weight limit 320 kg Front suspension hydraulic double-acting telescopic...
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Front tyre Tubeless 120/70-14'' 55P Rear tyre Tubeless 140/60-13'' 63P ENGINE SPECIFICATIONS ENGINE Single-cylinder, four-stroke Bore x stroke 57 x 48.6 mm Engine capacity 124 cm³ Compression ratio 11.5 ÷ 12.5 : 1 Variable ignition advance (before Variable TDC) 125 Idle speed ~ 1650 ±...
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Cooling forced-circulation fluid cooling by means of a centrifugal pump driven by the crankshaft Lubrication with lobe pump (inside the crankcase) chain-driven and double filter: mesh and paper Electronic ignition Consisting of a capacitor discharge ignition microprocessor with a built-in AT coil and variable advance Air filter Sponge, soaked in a mixture (50%...
Toolkit (04_02) Wrenches: socket wrench (16 mm); a double ended screwdriver, a shock absorber wrench. The tools are stored under the seat in an appropriate container. 04_02...
05_01 CAUSES YOUR WARRANTY RIGHTS TO EXPIRE. CAUTION PIAGGIO-GILERA MARKETS ITS OWN LINE OF ACCESSORIES, WHICH ARE COVERED BY A MANUFACTURER'S WARRANTY ON THE BASIS OF THEIR USE. IT IS THEREFORE ABSOLUTELY NECESSARY TO CONTACT AN AU- THORISED PIAGGIO-GILERA DEALER OR SERVICE CENTRE TO CHOOSE THEM AND HAVE THEM CORRECTLY ASSEMBLED.
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Scheduled servicing table (06_01) Adequate maintenance is fundamental to ensuring long-lasting, optimum operation and performance of your vehicle. To this end, a series of checks and maintenance operations (at the owner's expense) have been suggested, which are included in the summary table on the following page. Any minor faults should be reported without delay to an Authorised Service Centre or Dealer without waiting until the next scheduled service to solve it.
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km x 1,000 Brake fluid ** Coolant ** Engine oil * Hub oil Headlight direction adjustment Brake pads Sliding blocks / variable speed rollers Tyre pressure and wear Vehicle road test Radiator (external cleaning) Idle speed Odometer gear Suspension Steering Transmission I: CHECK AND CLEAN, ADJUST, LUBRICATE OR REPLACE, IF NECESSARY C.
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RECOMMENDED PRODUCTS TABLE Product Description Specifications AGIP GEAR SAE 80W-90 Lubricant for gearboxes and transmissions. API GL-4 eni i-Ride PG 5W-40 Synthetic based lubricant for high-performance JASO MA, MA2 - API SL - ACEA A3 four-stroke engines. AGIP FILTER OIL Special product for the treatment of foam filters.
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The descriptions and images in this publication are given for illustrative purposes only and are not binding. While the basic characteristics as described and illustrated in this booklet remain unchanged, Piaggio & C. S.p.A. reserves the right, at any time and without being required to update this publication beforehand, to make any changes to components, parts or accessories, which it considers necessary to improve the product or which are required for manufacturing or construction reasons.
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Do you have a question about the Runner 125 and is the answer not in the manual?
Questions and answers
It starts but won't rev up properly
The Gilera Runner 125 does not rev up properly after starting due to a possible issue with the carburetor or a more serious engine problem. The document mentions that the engine "bogs out badly," which could indicate a fuel delivery issue, such as a clogged carburetor. Additionally, there is a large hole in the exhaust that has been temporarily covered with tinfoil, which could also affect engine performance by disrupting proper exhaust flow.
This answer is automatically generated