APRILIA SX 125 Guide

SERVICE STATION MANUAL
854196
RX SX 125

SERVICE STATION
MANUAL
RX SX 125
The descriptions and illustrations given in this publication are not binding; While the basic characteristics
as described and illustrated in this manual remain unchanged, aprilia 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.
Notallversionsshowninthispublicationareavailableinallcountries.Theavailabilityofindividualmodels
should be confirmed with the official aprilia sales network.
© Copyright 2008 aprilia. All rights reserved. Reproduction of this publication in whole or in part is
prohibited. aprilia - After-sales service.
aprilia trademark is property of Piaggio & C. S.p.A.

SERVICE STATION MANUAL
RX SX 125
-This manualprovides themain informationto carryout regularmaintenance operationson yourvehicle.
- This manual is intended to aprilia Dealers and their qualified mechanics; several concepts have been
deliberately omitted as they are considered unnecessary. As it is not possible to include complete
mechanical notions in this manual, users should have basic mechanical knowledge or minimum
knowledge about the procedures involved when repairing scooters. Without this knowledge, repairing or
checking the vehicle may be inefficient or even dangerous. As the vehicle repair and check procedures
are not described in detail, be extremely cautious so as not to damage components or injure individuals.
In order to optimise customer satisfaction when using our vehicles, aprilia s.p.a. commits itself to
continually improve its products and the relative documentation. The main technical modifications and
changes in repair procedures are communicated to all aprilia Sales Outlets and its International
Subsidiaries.These changeswill beintroduced inthesubsequent editionsof themanual. Incaseof need
or further queries on repair and check procedures, consult aprilia CUSTOMER DEPARTMENT, which
will be prepared to provide any information on the subject and any further communications on updates
and technical changes related to the vehicle.
NOTE Provides key information to make the procedure easier to understand and carry out.
CAUTION Refers to specific procedures to carry out for preventing damages to the vehicle.
WARNING Refers to specific procedures to carry out to prevent injuries to the repairer.
Personal safety Failure to completely observe these instructions will result in serious risk of personal
injury.
Safeguarding the environment Sectionsmarked withthis symbolindicate thecorrect useof thevehicle
to prevent damaging 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.

INDEX OF TOPICS
CHARACTERISTICS CHAR
SPECIAL TOOLS S-TOOLS
MAINTENANCE MAIN
TROUBLESHOOTING TROUBL
ELECTRICAL SYSTEM ELE SYS
ENGINE FROM VEHICLE ENG VE
ENGINE ENG
POWER SUPPLY P SUPP
SUSPENSIONS SUSP
CHASSIS CHAS
COOLING SYSTEM COOL SYS
BODYWORK BODYW
PRE-DELIVERY PRE DE

INDEX OF TOPICS
CHARACTERISTICS CHAR

Rules
Safety rules
Carbon monoxide
If you need to keep the engine running while working on the vehicle, please ensure that you do so in
an open or very well ventilated area. Never run the engine in an enclosed area. If you do work in an
enclosed area, make sure to use a fume extraction system.
CAUTION
EXHAUSTEMISSIONSCONTAINCARBONMONOXIDE,A POISONOUSGASWHICHCAN CAUSE
LOSS OF CONSCIOUSNESS AND EVEN DEATH.
Fuel
CAUTION
THE FUEL USED TO POWER INTERNAL COMBUSTION ENGINES IS HIGHLY FLAMMABLE AND
MAY BE EXPLOSIVE UNDER CERTAIN CONDITIONS. IT IS THEREFORE RECOMMENDED TO
CARRY OUT REFUELLING AND MAINTENANCE PROCEDURES IN A VENTILATED AREA WITH
THEENGINESWITCHEDOFF.DONOTSMOKEDURING REFUELLING OR NEAR FUEL VAPOUR.
AVOIDANY CONTACT WITH NAKEDFLAME,SPARKSOR OTHER HEAT SOURCESWHICHMAY
CAUSE IGNITION OR EXPLOSION.
DO NOT ALLOW FUEL TO DISPERSE INTO THE ENVIRONMENT.
KEEP OUT OF THE REACH OF CHILDREN
Hot components
The engine and the exhaust system components become very hot and remain hot for some time after
the engine has been switched off. When handling these components, wear insulating gloves or wait
until the engine and the exhaust system have cooled down.
Coolant
The coolant contains ethylene glycol which, under certain conditions, can become flammable.
When it burns, ethylene glycol produces an invisible flame which however can cause burns.
CAUTION
TAKE CARE NOT TO SPILL COOLANT ONTO HOT ENGINE OR EXHAUST SYSTEM COMPO-
NENTS; THE FLUID MAY IGNITE AND BURN WITH AN INVISIBLE FLAME. WHEN CARRYING
OUT MAINTENANCE, IT IS ADVISABLE TO WEAR LATEX GLOVES. EVEN THOUGH IT IS TOXIC,
COOLANT HAS A SWEET FLAVOUR WHICH MAKES IT VERY ATTRACTIVE TO ANIMALS. NEV-
ER LEAVE THE COOLANT IN OPEN CONTAINERS IN AREAS ACCESSIBLE TO ANIMALS AS
THEY MAY DRINK IT.
RX SX 125 Characteristics
CHAR - 7

KEEP OUT OF THE REACH OF CHILDREN
DO NOT REMOVE THE RADIATOR CAP WHEN THE ENGINE IS STILL HOT. THE COOLANT IS
PRESSURISED AND MAY CAUSE SCALDING.
Used engine oil and transmission oil
CAUTION
IT IS ADVISABLE TO WEAR LATEX GLOVES WHEN SERVICING THE VEHICLE.
THE ENGINE OR GEARBOX OIL MAY CAUSE SERIOUS INJURIES TO THE SKIN IF HANDLED
FOR PROLONGED PERIODS OF TIME AND ON A REGULAR BASIS.
WASH YOUR HANDS CAREFULLY AFTER HANDLING OIL.
HAND THE OIL OVER TO OR HAVE IT COLLECTED BY THE NEAREST USED OIL RECYCLING
COMPANY OR THE SUPPLIER.
DO NOT DISPOSE OF OIL IN THE ENVIRONMENT
KEEP OUT OF THE REACH OF CHILDREN
Brake and clutch fluid
BRAKE AND CLUTCH FLUIDS CAN DAMAGE THE PLASTIC OR RUBBER PAINTED SURFACES.
WHEN SERVICING THE BRAKING SYSTEM OR THE CLUTCH SYSTEM PROTECT THESE COM-
PONENTS WITH A CLEAN CLOTH. ALWAYS WEAR PROTECTIVE GOGGLES WHEN SERVICING
THESE SYSTEMS. BRAKE AND CLUTCH FLUIDS ARE EXTREMELY HARMFUL FOR YOUR
EYES. IN THE EVENT OF ACCIDENTAL CONTACT WITH YOUR EYES, RINSE THEM IMMEDI-
ATELY WITH ABUNDANT COLD, CLEAN WATER AND SEEK MEDICAL ADVICE.
KEEP OUT OF THE REACH OF CHILDREN
Battery electrolyte and hydrogen gas
CAUTION
THE BATTERY ELECTROLYTE IS TOXIC, CORROSIVE AND, AS IT CONTAINS SULPHURIC
ACID, MAY CAUSE BURNING IF IT COMES INTO CONTACT WITH THE SKIN. WHEN HANDLING
BATTERY ELECTROLYTE, WEAR TIGHT-FITTING GLOVES AND PROTECTIVE APPAREL. IN
THE EVENT OF SKIN CONTACT WITH THE ELECTROLYTIC FLUID, RINSE WELL WITH PLENTY
OF CLEAN WATER. IT IS PARTICULARLY IMPORTANT TO PROTECT YOUR EYES BECAUSE
EVEN TINY AMOUNTS OF BATTERY ACID MAY CAUSE BLINDNESS. IN THE EVENT OF CON-
TACT WITH THE EYES, RINSE WITH PLENTY OF WATER FOR FIFTEEN MINUTES AND CON-
SULT AN EYE SPECIALIST IMMEDIATELY. IF THE FLUID IS ACCIDENTALLY SWALLOWED,
DRINK LARGE QUANTITIES OF WATER OR MILK, FOLLOWED BY MILK OF MAGNESIA OR
VEGETABLE OIL AND SEEK MEDICAL ADVICE IMMEDIATELY. THE BATTERY RELEASES EX-
PLOSIVE GASES; KEEP IT AWAY FROM FLAMES, SPARKS, CIGARETTES OR ANY OTHER
HEAT SOURCES. ENSURE ADEQUATE VENTILATION WHEN SERVICING OR RECHARGING
THE BATTERY.
KEEP OUT OF THE REACH OF CHILDREN
BATTERY LIQUID IS CORROSIVE. DO NOT POUR OR SPILL ON PLASTIC COMPONENTS IN
PARTICULAR. ENSURE THAT THE ELECTROLYTIC ACID IS COMPATIBLE WITH THE BATTERY
BEING ACTIVATED.
Maintenance rules
GENERAL PRECAUTIONS AND INFORMATION
Characteristics RX SX 125
CHAR - 8

When repairing, dismantling and reassembling the vehicle, follow the recommendations given below
carefully.
BEFORE DISASSEMBLING COMPONENTS
•Beforedismantling components, remove dirt, mud, dust andforeign bodiesfrom thevehicle.
Use the special tools designed for this bike, as required.
COMPONENTS REMOVAL
•Donot loosenand/or tightenscrews andnuts usingpliers orany othertools thanthe specific
wrench.
•Mark the positions on all connection joints (pipes, cables, etc.) before separating them, and
identify them with different distinctive symbols.
•Each component needs to be clearly marked to enable identification during reassembly.
•Clean and wash the dismantled components carefully using a low-flammability detergent.
•Keep mated parts together since they have "adjusted" to each other due to normal wear.
•Some components must be used together or replaced altogether.
•Keep away from heat sources.
REASSEMBLING COMPONENTS
CAUTION
BEARINGS MUST ROTATE FREELY, WITHOUT JAMMING AND/OR NOISE, OTHERWISE, THEY
NEED TO BE REPLACED.
•Only use ORIGINAL Aprilia SPARE PARTS.
•Comply with lubricant and consumables use guidelines.
•Lubricate parts (whenever possible) before reassembling them.
•Whentightening nuts andscrews,start either fromthecomponents withthelargestdiameter
or from the innermost components, proceeding diagonally. Tighten nuts and screws in suc-
cessive steps before applying the tightening torque.
•Always replace self-locking nuts, washers, sealing rings, circlips, O-rings (OR), cotter pins
and screws with new parts if the thread is damaged.
•When assembling the bearings, make sure to lubricate them well.
•Check that each component is assembled correctly.
•After a repair or routine maintenance, carry out pre-ride checks and test the vehicle on
private grounds or in an area with low traffic.
•Clean all mating surfaces, oil seal rims and gaskets before refitting. Smear a thin layer of
lithium-based grease on the oil seal rims. Reassemble oil seals and bearings with the brand
or batch number facing outward (visible side).
ELECTRIC CONNECTORS
Electric connectors must be disconnected as described below; failure to comply with this procedure
causes irreparable damage to both the connector and the wiring harness:
Press the relative safety clips, if applicable.
RX SX 125 Characteristics
CHAR - 9

•Grip the two connectors and disconnect them by pulling them in opposite directions.
•If any signs of dirt, rust, moisture, etc. are noted, clean the inside of the connector carefully
with a jet of compressed air.
•Ensure that the cables are correctly fastened to the internal connector terminals.
•Then connect the two connectors, ensuring that they couple correctly (if fitted with clips, you
will hear them "click" into place).
CAUTION
DO NOT DISCONNECT CONNECTORS BY PULLING THE CABLES.
NOTE
THE TWO CONNECTORS CAN ONLY BE CONNECTED IN ONE DIRECTION: CONNECT THEM
THE RIGHT WAY ROUND.
TIGHTENING TORQUES
CAUTION
REMEMBERTHATTHETIGHTENING TORQUES FOR ALL FASTENING ELEMENTSONWHEELS,
BRAKES, WHEEL AXLES AND ANY OTHER SUSPENSION COMPONENTS PLAY A KEY ROLE
IN ENSURING VEHICLE SAFETY AND MUST COMPLY WITH SPECIFIED VALUES. CHECK THE
TIGHTENING TORQUES OF FASTENING ELEMENTS ON A REGULAR BASIS AND ALWAYS USE
A TORQUE WRENCH TO REASSEMBLE THESE COMPONENTS. FAILURE TO COMPLY WITH
THESE RECOMMENDATIONS MAY CAUSE ONE OF THESE COMPONENTS TO LOOSEN OR
EVEN DETACH, CAUSING A WHEEL TO LOCK OR COMPROMISING VEHICLE HANDLING. THIS
MAY LEAD TO FALLS, WITH THE RISK OF SERIOUS INJURY OR DEATH.
Running-in
Engine run-in is essential to ensure engine long life and correct operation. Twisty roads and gradients
are ideal to run in engine, brakes and suspensions effectively. Vary your riding speed during the run-
in. This ensures that components operate under both "loaded" and "unloaded" conditions, allowing the
engine components to cool.
CAUTION
THE FULL PERFORMANCE OF THE VEHICLE IS ONLY AVAILABLE AFTER THE SERVICE AT
THE END OF THE RUN-IN PERIOD.
Follow the guidelines detailed below:
•Do not twist the throttle grip abruptly and completely when the engine is working at a low
revs, either during or after run-in.
•During the first 100 km (62 miles) brake carefully to avoid rough and long braking. That is
to permit the adequate adjustment of the pad friction material to the brake discs.
Vehicle identification
CAUTION
CHANGING THE IDENTIFICATION CODE IS A CRIME THAT MAY BE PUNISHED WITH SERIOUS
CRIMINAL CHARGES. FURTHERMORE, THE LIMITED WARRANTY FOR NEW VEHICLES WILL
BE CANCELLED IF THE VEHICLE IDENTIFICATION NUMBER (VIN) HAS BEEN MODIFIED OR
CANNOT BE QUICKLY DETERMINED.
Characteristics RX SX 125
CHAR - 10

CHASSIS NUMBER
The chassis number is stamped on the right side
of the headstock.
ENGINE NUMBER
The engine number is stamped on the rear side,
next to the shock absorber.
Dimensions and mass
DIMENSIONS
SIZES SX 125 RX 125
Maximum length 2165 mm (82.24 in) 2255 mm (88.78 in)
Max. width (to brake levers) 850 mm (33.46 in) 850 mm (33.46 in)
Max. height (to mirrors) 1390 mm (54.72 in) 1415 mm (55.71 in)
Saddle height 870 mm (34.25 in) 925 mm (36.42 in)
Wheelbase 1480 mm (58.27 in) 1480 mm (58.27 in)
Minimum ground clearance 260 mm (10.24 in) 300 mm (11.81 in)
Engine
ENGINE
Specification Desc./Quantity
Type single-cylinder, 2-stroke, with reed intake. Separate lubrication
with automatic mixer with variable value (1.0 - 3.0 %).
Cylinder quantity 1
Overall engine capacity 124.82 cm³ (7.616 cu.in)
Bore/stroke 54 - 54.5 mm (2.12 - 2.14 in)
Compression ratio 12.5 +/- 0.5 :1
Squish 1.5 mm (0.06 in)
Engine revs at idle speed 1250 +/- 100 rpm
Engine revs at maximum speed 11000 ± 100 rpm
Ignition CDI with electronic timing
Start-up electric
Clutch multiple-disk,oil-bathedclutchwith hand control ontheleftside
of the handlebar.
Cooling liquid
Lubrication system Separate lubrication with automatic mixer with variable value
(1.0 - 1.3 %).
RX SX 125 Characteristics
CHAR - 11

GEAR
Specification Desc./Quantity
Type mechanic, 6 gear with pedal lever on the left hand side of the
engine
Gear lubrication Splash lubrication
Transmission
TRANSMISSION
TRANSMISSION SX 125 RX 125
Gear ratio 19/63 = 1 :3.316 19/63 = 1 :3.316
1st gear ratio 10/30 = 1:3.000 10/30 = 1:3.000
2nd gear ratio 14/29 = 1:2.071 14/29 = 1:2.071
3rd gear ratio 17/27 = 1:1.588 17/27 = 1:1.588
4th gear ratio 19/25 = 1:1.316 19/25 = 1:1.316
5th gear ratio 21/23 = 1:1.095 21/23 = 1:1.095
6th gear ratio 22/21 = 1:0.954 22/21 = 1:0.954
Final gear ratio (11 kW ) 16/45 = 1:2.812 16/49 = 1:3.062
Final gear ratio (full power ) 15/45 = 1:3.600 15/49 = 1:3.267
Capacities
CAPACITY
CAPACITY SX 125 RX 125
Fuel (reserve included) 10 l (2.20 UKgal) 10 l (2.20 UKgal)
Fuel reserve 3 l (0.66 UKgal) 3 l (0.66 UKgal)
Gearbox oil 600 cm³ (36.61 cu.in) 600 cm³ (36.61 cu.in)
Mixer oil (reserve included) 1 l (0.22 UKgal) 1 l (0.22 UKgal)
Mixer oil reserve 0.25 l (0.055 UKgal) 0.25 l (0.055 UKgal)
Fork oil 400 cm³ (24.41 cu.in) 400 cm³ (24.41 cu.in)
Fork oil level depth from the rim (spring not inclu-
ded; the whole fork comprised) 150 mm (5.90 in) 150 mm (5.90 in)
Coolant (50% H2O + 50% ethylene glycol anti-
freeze fluid) 0.8 l (0.17 UKgal) 0.8 l (0.17 UKgal)
Seats 2 2
Kerb weight (full tank) 126 kg (277.8 lb) 126 kg (277.8 lb)
Scooter max load (rider + passenger + luggage) 336 kg (740.7 lb) 336 kg (740.7 lb)
Electrical system
IGNITION
IGNITION SX 125 RX 125
IGNITION Electronic Electronic
Ignition advance CDI CDI
SPARK PLUG
SPARK PLUG SX 125 RX 125
Standard NGK BR8ES NGK BR8ES
Full Power NGK BR10EG NGK BR10EG
Spark plug electrode gap 0.7 - 0.8 mm (0.027 - 0.031 in) 0.7 - 0.8 mm (0.027 - 0.031 in)
ELECTRICAL SYSTEM
ELECTRICAL SYSTEM SX 125 RX 125
Battery YUASA YUASA
fuses 20A - 15A - 7.5A 20A - 15A - 7.5A
Characteristics RX SX 125
CHAR - 12

ELECTRICAL SYSTEM SX 125 RX 125
(Permanent magnet) Generator 12V - 180W 12V - 180W
BULBS
BULBS SX 125 RX 125
License plate bulb 5 W 5 W
Rear tail light /stop light led led
Front tail bulb 2V x 3W 2V x 3W
Front/rear turn indicator bulbs 4 x 10W 4 x 10W
Low-/high-beam light bulb HS1 HS1
WARNING LIGHTS
Warning lights SX 125 RX 125
Engine oil level warning light LED LED
High-beam warning light LED LED
Gear in neutral warning light LED LED
Turn indicator warning light LED LED
Frame and suspensions
CHASSIS
CHASSIS SX 125 RX 125
Type Framework with double cradle and
high-resistant steel tubes Framework with double cradle and high-resistant steel tubes
Steering inclination angle 28° 28°
Trail 102 mm (4.02 in) - suspensions fully
extended 113 mm (4.45 in) - suspensions fully extended
Size "A" 555 mm (21.85 in) 555 mm (21.85 in)
Size "B" 459 mm (18.07 in) 459 mm (18.07 in)
SUSPENSIONS
SUSPENSIONS SX 125 RX 125
Front Upside-down with Ø 40-mm (1.57 in) stems Upside-down with Ø 40-mm (1.57 in) stems
Front suspension travel 260 mm (10.24 in) 260 mm (10.24 in)
Rear single gas shock absorber single gas shock absorber
Rear suspension travel 265 mm (10.43 in) 265 mm (10.43 in)
Brakes
BRAKES
BRAKES SX 125 RX 125
Front brake Discbrake,Ø260-mm(10.24 in) with
control Discbrake,Ø260-mm(10.24 in) with control
Rear brake Disc brake, Ø 220-mm (8.66 in) with
control Disc brake, Ø 220-mm (8.66 in) with control
RX SX 125 Characteristics
CHAR - 13

Wheels and tyres
WHEEL RIMS
WHEEL RIMS SX 125 RX 125
Front 3.00/17" 1.6/21"
Rear 4.25/17" 2.15/18"
TYRES
TYRES SX 125 RX 125
Type Radial Radial
Front 110/70 R17 M/C 54H TL 90/90 - 21 54R MT 21
Rear 150/60 R17 M/C 66H TL 120/90 - 18 65R MT 21
front (rider only) 1.8 bar (180 kPa; 26.11 PSI) 1.4 bar (140 kPa; 20.30 PSI)
rear (rider only) 1.8 bar (180 kPa; 26.11 PSI) 1.6 bar (160 kPa; 23.21 PSI)
front (rider + passenger) 2.0 bar (200 kPa; 29.00 PSI) 1.5 bar (150 kPa; 21.75 PSI)
rear (rider + passenger) 1.8 bar (180 kPa; 26.11 PSI) 1.4 bar (140 kPa; 20.30 PSI)
Supply
FUEL SUPPLY
FUEL SUPPLY SX 125 RX 125
Carburettor model Dell'Orto VHST 28 CD Dell'Orto VHST 28 CD
Fuel Premium unleaded petrol Premium unleaded petrol
Tightening Torques
CHASSIS
Name Torque in Nm
Upper saddle pillar retainer - M8x30 (2) 25 Nm (18.44 lbf ft)
Lower saddle pillar retainer - M8x25 (2) 25 Nm (18.44 lbf ft)
Engine upper plate to chassis retainer - M8x20 (2) 25 Nm (18.44 lbf ft)
Chain tightener roller retainer - M8x60 (1) 25 Nm (18.44 lbf ft)
FOOTRESTS
Name Torque in Nm
Passenger footrest support to saddle pillar retainer - M8x20 (4) 25 Nm (18.44 lbf ft)
Rider footrest support to chassis retainer - M8x45 (2) 25 Nm (18.44 lbf ft)
STAND
Name Torque in Nm
Stand retainer (1) 10 Nm (7.37 lbf ft)
Stand retainer - M10x1.25 lower nut (1) 30 Nm (22.13 lbf ft)
SWINGARM
Name Torque in Nm
Chain guide slider retainer to the fork (1) 5 Nm (3.69 lbf ft)
Chain eye retainer (2) 10 Nm (7.37 lbf ft)
Chain set screw - M8 lower nut (2) 25 Nm (18.44 lbf ft)
Fork pin retainer - M14x1.5 lower nut (1) 80 Nm (59 lbf ft)
Crankcase chain retainer - M5x12 TBEI screw (2) 5 Nm (3.69 lbf ft)
FRONT SUSPENSION
Name Torque in Nm
Upper plate retainer - M8x35 (2) 25 Nm (18.44 lbf ft)
Characteristics RX SX 125
CHAR - 14

Name Torque in Nm
Lower plate retainer - M6x30 (4) 10 Nm (7.37 lbf ft)
Foot lock on wheel pin - M6x25 (2) 10 Nm (7.37 lbf ft)
Bearing pack ring nut preloading (1) 17 Nm (12.54 lbf ft)
Bearings pack ring nut (1) 7 Nm (5.16 lbf ft)
Fork cap (1) 80 Nm (59 lbf ft)
REAR SUSPENSION
Name Torque in Nm
Shock absorber upper retainer - TCEI M10x55 screw (1) 50 Nm (36.9 lbf ft)
Single connecting rod to chassis attachment retainer - TCEI
M12x107 screw (1) 85 Nm (62.7 lbf ft)
Double connecting rod to single connecting rod retainer - TE
M10x61 screw (3) 50 Nm (36.9 lbf ft)
ENGINE
Name Torque in Nm
Engine upper plate to engine retainer - TCEI M8x80 screw (1) 25 Nm (18.44 lbf ft)
Gear shift lever retainer - TCEI M6x20 screw (1) 10 Nm (7.37 lbf ft)
Engine front retainer - TCEI M10x130 screw (1) 50 Nm (36.88 lbf ft)
Engine rear retainer - TCEI M8x60 screw (1) 25 Nm (18.44 lbf ft)
Pinion protection case retainer - TCEI M8x60 screw (2) 25 Nm (18.44 lbf ft)
Solenoid retainer - TE M6x30 screw (1) 10 Nm (7.37 lbf ft)
Coil to chassis retainer - TE M6x40 screw (2) 10 Nm (7.37 lbf ft)
FILTER CASING
Name Torque in Nm
Filter half-housing retainer (7) 3 Nm (2.2 lbf ft)
Filter cover retainer (4) 3 Nm (2.2 lbf ft)
Filter housing to saddle pillar upper retainer (1) 6 Nm (4.42 lbf ft)
Filter casing / mudflap to saddle pillar lower retainer (2) 6 Nm (4.42 lbf ft)
SAS valve to chassis / horn retainer - TE M6x12 screw (2) 10 Nm (7.37 lbf ft)
EXHAUST SYSTEM
Name Torque in Nm
Muffler retainer - TE M6x16 screw (1) 10 Nm (7.37 lbf ft)
Intermediate pipe retainer - TE M6x12 screw (1) 10 Nm (7.37 lbf ft)
Protection retainer - TE M6x12 screw (2) 10 Nm (7.37 lbf ft)
Silencer support bracket retainer - TE M6x16 screw (2) 10 Nm (7.37 lbf ft)
Silencer retainer - TCEI M6x16 screw (1) 10 Nm (7.37 lbf ft)
Silencer support retainer - TE M6x16 screw (2) 10 Nm (7.37 lbf ft)
COOLING SYSTEM
Name Torque in Nm
Radiator to chassis retainer - TE M6x25 screw (6) 10 Nm (7.37 lbf ft)
FRONT WHEEL
Name Torque in Nm
Wheel pin retainer (1) 80 Nm (59 lbf ft)
Brake disc retainer - TSPEI M8x16 screw (6) 25 Nm (18.44 lbf ft) - Loctite 243
REAR WHEEL
Name Torque in Nm
Rear wheel pin retainer - M16x1.5 nut (1) 100 Nm (73.75 lbf ft)
Brake disc retainer - TSPEI M6x16 screw (6) 10 Nm (7.37 lbf ft) - Loctite 243
Crown retainer - TSPEI M8x26 screw (6) 25 Nm (18.44 lbf ft) - Loctite 243
Speed sensor support plate retainer - TE M6x12 screw (2) 10 Nm (7.37 lbf ft)
Speed sensor retainer - TE M6x16 screw (1) 10 Nm (7.37 lbf ft)
RX SX 125 Characteristics
CHAR - 15

FRONT BRAKE
Name Torque in Nm
Front brake calliper to fork feet retainer - TE M8x30 screw (2) 25 Nm (18.44 lbf ft)
Front brake pipe to stem protection retainer - TE M5x16 screw
(2) 5 Nm (3.69 lbf ft)
Front brake pipe to stem protection retainer - M5 nut (2) 5 Nm (3.69 lbf ft)
REAR BRAKE
Name Torque in Nm
Rear brake pump to chassis retainer - TE M6x16 screw (2) 10 Nm (7.37 lbf ft)
Rear brake lever retainer - TCEI M8x50 screw (1) 25 Nm (18.44 lbf ft)
Rear brake calliper to support retainer - TE M8x20 screw (2) 25 Nm (18.44 lbf ft)
Brake pipe to fork retainer - TE M5x16 screw (2) 5 Nm (3.69 lbf ft)
HANDLEBAR AND CONTROLS
Name Torque in Nm
Front brake pump retainer- TCEI M6x25 screw (2) 10 Nm (7.37 lbf ft)
Clutch control retainer - TCEI M5x15 screw (2) 5 Nm (3.69 lbf ft)
Handlebar U-bolts - TE M7x35 screw (4) 18 Nm (13.28 lbf ft)
Throttle control - TCEI M5x15 screw (2) 5 Nm (3.69 lbf ft)
Throttle control cover - M4x9 screw (2) 3 Nm (2.21 lbf ft)
Left light switch - screw (2) 1.5 Nm (1.1 lbf ft)
ELECTRICAL COMPONENTS
Name Torque in Nm
Control unit retainer - screw (2) 5 Nm (3.69 lbf ft)
Regulator to mudflap retainer - TE M6x30 screw (2) 10 Nm (7.37 lbf ft)
LIGHTS / INSTRUMENT PANEL
Name Torque in Nm
Instrument panel retainer - M5 nut (3) 5 Nm (3.69 lbf ft)
Front light retainer - TBEI M6x20 screw (2) 10 Nm (7.37 lbf ft)
Rear light retainer - screw (2) 3 Nm (2.21 lbf ft)
Front turn indicators retainer - TBEI M6x20 screw (2) 10 Nm (7.37 lbf ft)
Rear turn indicators retainer - TBEI M6x20 screw (2) 10 Nm (7.37 lbf ft)
License plate retainer - screw (1) 3 Nm (2.21 lbf ft)
TANK
Name Torque in Nm
Fuel cock to tank retainer - TE M6x12 screw (2) 7 Nm (5.16 lbf ft)
Tank retainer - TE M6x30 screw (2) 10 Nm (7.37 lbf ft)
BODYWORK
Name Torque in Nm
Mudflap to saddle pillar retainer - TBEI M5x16 screw (2) 5 Nm (3.69 lbf ft)
License plate holder / mudflap to saddle pillar retainer - TE
M6x16 screw (4) 7 Nm (5.16 lbf ft)
Tail to right/left tail section retainer - TBEI M5x9 screw (2) 5 Nm (3.69 lbf ft)
Tail to right/left tail section retainer - screw (2) 3 Nm (2.21 lbf ft)
Tail section / fairing to saddle pillar retainer - TE M5x25 screw
(2) 5 Nm (3.69 lbf ft)
rh/lh fairing front retainer - TE M5x16 screw (2) 5 Nm (3.69 lbf ft)
Fairing to mudflap retainer - TBEI M5x10 screw (2) 5 Nm (3.69 lbf ft)
Fork protection guide retainer - TE M5x20 screw (2) 5 Nm (3.69 lbf ft)
Fork protection retainer - TE M5x12 screw (6) 5 Nm (3.69 lbf ft)
Shock absorber protection to mudflap retainer - TE M6x20
screw (2) 10 Nm (7.37 lbf ft)
Front mudguard to lower plate retainer - TE M6x16 screw (4) 7 Nm (5.16 lbf ft)
Tie rods to front mudguard retainer - TBEI M5 screw (2) 5 Nm (3.69 lbf ft)
Tie rods to front mudguard retainer - M5x20 screw (2) 5 Nm (3.69 lbf ft)
Characteristics RX SX 125
CHAR - 16

Name Torque in Nm
Instrument panel support / tank to upper plate retainer - TCEI
M6x30 screw (1) 10 Nm (7.37 lbf ft)
Tank cover to chassis retainer - TE M6x30 screw (1) 10 Nm (7.37 lbf ft)
Tank cover to tank retainer - TBEI M5 screw (2) 5 Nm (3.69 lbf ft)
Rh/ Lh deflector brackets to radiator system retainer - TBEI
M5x9 screw (2) 5 Nm (3.69 lbf ft)
Rh/ Lh deflector bracket to radiator systems retainer - TCB
M4x16 screw (2) 3 Nm (2.21 lbf ft)
Rh/ Lh deflector to chassis retainer - TBEI M5x9 (2) screw 5 Nm (3.69 lbf ft)
Rh/ Lh deflector to tank front retainer - TE M5x25 (2) screw 5 Nm (3.69 lbf ft)
Rh/ Lh chassis cover retainer - TBEI M5x12 (2) screw 5 Nm (3.69 lbf ft)
FINISHINGS
Name Torque in Nm
Saddle lock tongue retainer - screw (1) 3 Nm (2.21 lbf ft)
Switch retainer - TCEI M8x16 screw (1) 25 Nm (18.44 lbf ft)
Switch - shear head screw retainer (1) Manual
Recommended products chart
LUBRICANTS CHART
Product Description Specifications
Agip GEAR SYNTH, SAE 75W - 90 Gearbox oil As an alternative for recommended oils,
use top branded oils that meet or exceed
the API GL - 4 requirements.
AGIP FORK 7.5W Recommended FORK OIL If you intend to have an intermediate per-
formance, as an alternative to the recom-
mended AGIP FORK 5W or AGIP FORK
20W use:
AGIP FORK 7.5W
AGIP FORK 10W
AGIP FORK 15W
AGIP SPEED 2T Mixer oil As an alternative for recommended oils,
use top branded fully synthetic oils that
meet or exceed the ISO - L - EGD, JASO
FC or API TC specifications require-
ments.
AGIP GREASE SM 2 Grease for C-ring of the tone wheel Soap-based lithium grease with NLGI 2
molybdenum disulphide; ISO-L-
XBCHB2, DIN KF2K-20
NEUTRAL GREASE OR PETROLEUM
JELLY Battery poles Neutral grease or petroleum jelly.
AGIP CHAIN GREASE SPRAY Chain spray grease -
AGIP BRAKE 4 / BRAKE 5.1 Recommended BRAKE FLUID -
RX SX 125 Characteristics
CHAR - 17

INDEX OF TOPICS
SPECIAL TOOLS S-TOOLS

SPECIAL TOOLS
Stores code Description
AP0277215 Buffer for fitting oil seal 250455
AP0277875 Buffer for fitting oil seal 230425
AP0276502 Buffer for fitting oil seal 930675
AP0276770 Buffer for fitting oil seal 230195
AP0277970 Guide bushing for oil seal 930675
AP0876973 Piston ring clamp 54 mm
RX SX 125 Special tools
S-TOOLS - 19

Stores code Description
AP0276040 Clutch wrench 11 mm
AP0277180 Bearing tie rod kit
AP0277455 Extractor plate to separate the crankcase
halves
AP0276380 bolt M10
AP0276370 Split bushing
AP0242091 Hexagon nut M10
AP0276382 Bolt
Special tools RX SX 125
S-TOOLS - 20