APRILIA Air-injection 50 cc Owner's manual

www.serviceaprilia.com

workshopmanual

SR 50

1229 5

00/2005-05

8140817

USA

INTRODUCTION

0 - 1

SR 50

INTRODUCTION 0

INTRODUCTION

0 - 2

SR 50

TABLE OF CONTENTS

0.1. FOREWORD..................................................................................................................................................... 3

0.1.1. FOREWORD ............................................................................................................................................. 3

0.1.2. REFERENCE MANUALS .......................................................................................................................... 4

0.1.3. ABBREVIATIONS/SYMBOLS/CONVENTIONS ........................................................................................ 5

INTRODUCTION

0 - 3

SR 50

0.1. FOREWORD

0.1.1. FOREWORD

- This manual provides the information required for normal servicing.

- This manual is intended for use by aprilia Dealers and their qualified mechanics; certain information has been

omitted intentionally, as this manual does not purport to provide a comprehensive treatise on mechanics. The

persons who will use this manual must be fully conversant with the basics of mechanics and with the basic

procedures of motorcycle repair. Repairing or inspecting a motorcycle when one does not possess such basic

knowledge or training could result in improper servicing and make the motorcycle unsafe to ride. For the same

reason, certain basic precautions have been omitted in the descriptions of repair and inspection procedures; you are

therefore invited to take special care to avoid damage to motorcycle components or injury to persons. aprilia s.p.a.’s

mission is to constantly enhance the riding pleasure of final users through the ongoing improvement of its products

as well as of the relevant technical literature. All aprilia Dealers and Subsidiaries worldwide are kept updated on

major engineering changes and modifications to repair procedures. Such changes and modifications are then

reflected in the next release of the relevant manual. In case of need or doubt regarding repair and inspection

procedures, contact the aprilia SERVICE DEPARTMENT, which will be pleased to help, as well as providing you

with updates and technical modifications regarding the vehicle.

aprilia s.p.a. reserves the right to make changes to its products at any time, barring any such changes as may alter the

essential features of a product as specified in the relevant manual.

All rights of storage using electronic means, reproduction and total or partial adaptation, whatever the means adopted,

are reserved in all countries.

The mention of third parties’ products is only made for information purposes, and constitutes no engagement.

aprilia s.p.a. is not liable in any way for the performance or use of these products.

For more details, see (REFERENCE MANUALS).

First edition: May 2005

Produced and printed by:

DECA s.r.l.

via Vincenzo Giardini, 11 - 48022 Lugo (RA) - Italy

Tel. +39 - 0545 216611

Fax +39 - 0545 216610

E-mail: [email protected]

www.vftis.com

On behalf of:

aprilia s.p.a.

via G. Galilei, 1 - 30033 Noale (VE) - Italy

Tel. +39 – (0)41 58 29 111

Fax +39 – (0)41 58 29 190

www.aprilia.com

www.serviceaprilia.com

INTRODUCTION

0 - 4

SR 50

0.1.2. REFERENCE MANUALS

SPARE PARTS CATALOGUES

Version

aprilia part# (description)

5564_00

Version

aprilia part# (description)

5574_00

OWNER'S MANUALS

aprilia part#

8202397

8202441

8202442

8202439

ENGINE WORKSHOP MANUAL

Engines

aprilia part#

8140818

8140821

8140819

8140820

8140822

8CM0067

ENGINE WORKSHOP MANUAL

Engines

aprilia part#

8140645

8140646

8140647

8140648

8140649

8CM006

CHASSIS WORKSHOP MANUAL

aprilia part#

8140812

8140815

8140813

8140814

8140816

8140817

8CM0064

8CM0065

INTRODUCTION

0 - 5

SR 50

0.1.3. ABBREVIATIONS/SYMBOLS/CONVENTIONS

# = number

< = is less than

> = is more than

≤ = is less than or equal to

≥ = more than or equal to

~ = approximately

∞ = infinite

°C = degrees Celsius (centigrade)

°F = degrees Fahrenheit

± = plus or minus

AC = Alternated Current

A = Ampere

Ah = Ampere per hour

API = American Petroleum Institute

AT = High Tension

AV/DC = Anti-Vibration Double Countershaft

bar = pressure measurement (1 bar = 100 kPa)

DC = Direct Current

cc = cubic centimeters

CO = carbon oxide

CPU = Central Processing Unit

DIN = German industrial standards (Deutsche Industrie Norm)

DOHC = Double Overhead Camshaft

ECU = Electronic Control Unit

rpm = revolutions per minute

HC = unburnt hydrocarbons

ISC = Idle Speed Control

ISO = International Standardization Organization

kg = kilograms

kgm = kilogram per meter (1 kgm = 10 Nm)

km = kilometers

km/h = kilometers per hour

kΩ = kiloOhm

kPa = kiloPascal (1 kPa = 0.01 bar)

KS = clutch side (from the German "Kupplungseite")

kW = kiloWatt

l = liters

LAP = racetrack lap

LED = Light Emitting Diode

LEFT SIDE = left-hand side

m/s = meters per second

max = maximum

mbar = millibar (1 mbar = 0.1 kPa)

mi = miles

MIN = minimum

MPH = miles per hour

MS = flywheel side (from the German "Magnetoseite")

MΩ = MegaOhm

N.A. = Not Available

N.O.M.M. = Motor Octane Number

N.O.R.M. = Research Octane Number

Nm = Newton meter (1 Nm = 0.1 kgm)

Ω = ohm

PICK-UP = pick-up

BDC = Bottom Dead Center

TDC = Top Dead Center

PPC = Pneumatic Power Clutch

RIGHT SIDE = right-hand side

SAE = Society of Automotive Engineers

SAS = Secondary Air System

INTRODUCTION

0 - 6

SR 50

TEST = diagnostic check

T.B.E.I. = crowned-head Allen screw

T.C.E.I. = cheese-headed Allen screw

T.E. = hexagonal head

T.P. = flat head screw

TSI = Twin Spark Ignition

UPSIDE-DOWN = inverted fork legs

V = Volt

W = Watt

GENERAL INFORMATION

1 - 1

SR 50

GENERAL INFORMATION 1

GENERAL INFORMATION

1 - 2

SR 50

TABLE OF CONTENTS

1.1. STRUCTURE OF THE MANUAL...................................................................................................................... 3

1.1.1. CONVENTIONS USED IN THE MANUAL................................................................................................. 3

1.1.2. SAFETY WARNINGS ................................................................................................................................ 4

1.2. GENERAL RULES............................................................................................................................................ 5

1.2.1. BASIC SAFETY RULES ............................................................................................................................ 5

1.3. DANGEROUS ELEMENTS............................................................................................................................... 8

1.3.1. WARNINGS............................................................................................................................................... 8

1.4. RUNNING-IN .................................................................................................................................................. 11

1.4.1. RUNNING-IN ........................................................................................................................................... 11

1.5. VEHICLE IDENTIFICATION ........................................................................................................................... 12

1.5.1. POSITION OF THE SERIAL NUMBERS................................................................................................. 12

1.6. POSITION OF THE ADHESIVE WARNING LABELS..................................................................................... 13

1.6.1. POSITION OF THE ADHESIVE WARNING LABELS.............................................................................. 13

GENERAL INFORMATION

1 - 3

SR 50

1.1. STRUCTURE OF THE MANUAL

1.1.1. CONVENTIONS USED IN THE MANUAL

• This manual is divided in sections and subsections, each covering a set of the most significant components. For

quick reference, see the summary of sections.

• Unless expressly specified otherwise, assemblies are reassembled by reversing the disassembly procedure.

• The terms "left" and "right" are referred to the motorcycle when viewed from the riding position.

• Motorcycle operation and basic maintenance are covered in the "OWNER'S MANUAL".

In this manual any variants are identified with these symbols:

engine electronic injection Purejet

engine electronic injection Ditech

carburetor

optional

catalytic version

- all versions

11kW derated version 11 kW

80km speed 80km/h

f.p full-power version

MP national certification

SF European certification (EURO 1 limits)

VERSION:

Italy

Greece

Malaysia

United

Kingdom

Holland

Chile

Austria

Switzerland

Croatia

Portugal

Denmark

Australia

Finland

Japan

United

States of

America

Belgium

Singapore

Brazil

Germany

Slovenia

South Africa

France

Israel

New

Zealand

Spain

South

Korea

Canada

GENERAL INFORMATION

1 - 4

SR 50

1.1.2. SAFETY WARNINGS

The following precautionary warnings are used throughout this manual in order to convey the following messages:

Safety warning. When you find this symbol on the vehicle or in the manual, be careful to the potential

risk of personal injury. Disregarding the instructions identified by this symbol may compromise the

safety of the user, the motorcycle and third parties.

DANGER

Indicates a potential hazard which may result in serious injury or even death.

WARNING

Indicates a potential hazard which may result in minor personal injury or damage to the vehicle.

CAUTION: The word "CAUTION" in this manual identifies important information or instructions.

GENERAL INFORMATION

1 - 5

SR 50

1.2. GENERAL RULES

1.2.1. BASIC SAFETY RULES

CARBON MONOXIDE

When an operation must be performed with the engine running, position the motorcycle outdoors in a well-ventilated

area.

Never run the engine in an enclosed place.

Use an exhaust emission extraction system when working indoors.

DANGER

Exhaust gases contain carbon monoxide, a poisonous gas which, if inhaled, may cause loss of

consciousness or even death.

FUEL

DANGER

The fuel used to operate engines is highly flammable and becomes explosive under particular

conditions.

Refueling and maintenance operations should be carried out in a well-ventilated area, with the engine

off.

Do not smoke when refueling or in the proximity of sources of fuel vapors. Avoid contact with bare

flames, sources of sparks and any other source which may ignite fuel or lead to explosion.

DO NOT DISPOSE OF FUEL IN THE ENVIRONMENT.

KEEP AWAY FROM CHILDREN.

HOT COMPONENT PARTS

The engine and exhaust component parts become hot when the engine is running and will stay hot for some time after

the engine has been stopped.

Wear insulating gloves before handling these components or allow for the engine and the exhaust system to cool down

before proceeding.

USED GEARBOX AND FORK FLUIDS

DANGER

Wear latex gloves when servicing.

Prolonged or repeated contact with gear fluid may cause severe skin damage.

Wash your hands thoroughly after handling.

Dispose of it through the nearest waste oil reclamation firm or through the supplier.

Wear latex gloves during servicing.

DO NOT DISPOSE OF FLUID IN THE ENVIRONMENT

KEEP AWAY FROM CHILDREN.

BRAKE FLUID

WARNING

Brake fluid can damage plastic, rubber or painted parts. When servicing the brake system, protect all

such parts with a clean cloth.

Always wear safety glasses when servicing the brake system.

Brake fluid is highly irritant. Avoid contact with the eyes.

In case of contact with the eyes, rinse abundantly with cool, clean water and immediately seek

medical attention.

KEEP AWAY FROM CHILDREN.

GENERAL INFORMATION

1 - 6

SR 50

HYDROGEN GAS AND BATTERY ELECTROLYTE

DANGER

The battery electrolyte is a toxic, caustic substance containing sulfuric acid and thus able to cause

severe burns in case of contact.

Wear close-fitting gloves and protective clothing when handling this fluid.

If any battery fluid gets on your skin, rinse the affected area with abundant fresh water.

Take special care to protect the eyes; even a very small amount of battery fluid can cause blindness. If

battery fluid comes in contact with the eyes, flush with abundant water for fifteen minutes and contact

an eye specialist immediately.

If battery fluid is swallowed accidentally, drink abundant water or milk. Seek medical attention

immediately and keep drinking milk of magnesia or vegetable oil in the meantime.

The battery gives off explosive gases. Keep the battery well away from any sources of ignition, such

as flames, sparks, or any heat sources.

Make sure the area is well ventilated when servicing or refilling the battery.

KEEP AWAY FROM CHILDREN.

Battery fluid is corrosive.

Avoid spillage. Take special care not to spill battery fluid on plastic parts.

Ensure that the electrolyte fluid you are using is the suitable type for your battery.

GENERAL PRECAUTIONS AND INFORMATION

Follow these instructions closely when repairing, disassembling or reassembling the motorcycle or its components.

DANGER

Using bare flames is strictly forbidden when working on the motorcycle. Before servicing or

inspecting the motorcycle: stop the engine and remove the key from the ignition switch; allow the

engine and exhaust system to cool down; where possible, lift the motorcycle using adequate

equipment placed on firm and level ground. Pay particular attention to any parts of the engine or

exhaust system which may still be hot to the touch to avoid burns.

Never put mechanical parts or other vehicle components in your mouth when you have both hands

busy. None of the motorcycle components are edible. Some components are harmful to the human

body or toxic.

If not expressly indicated otherwise, for the reassembly of the units repeat the disassembly

operations in reverse order. Where a procedure is cross-referred to relevant sections in the manual,

proceed sensibly to avoid disturbing any parts unless strictly necessary. Do not use polishing pastes

on matt paints.

Never use fuel instead of solvent to clean the motorcycle.

Do not clean rubber or plastic parts or the seat with alcohol, gasoline or solvents. Use only water and

mild soap.

Always disconnect the battery negative (-) lead before soldering any electrical components.

When two or more persons service the same motorcycle together, special care must be taken to avoid

personal injury.

For further details, see (DANGEROUS ELEMENTS).

BEFORE REMOVING ANY COMPONENTS

• Clean off all dirt, mud, and dust and clear any foreign objects from the vehicle before disassembling any

components.

• Use the model-specific special tools where specified.

DISASSEMBLING THE COMPONENTS

- Never use pliers or similar tools to slacken and/or tighten nuts and bolts. Always use a suitable wrench.

- Mark the positions of all connections (hoses, wiring, etc.) before disconnecting them. Identify each connection using

a distinctive symbol or convention.

- Mark each part clearly to avoid confusion when refitting.

- Thoroughly clean and wash any components you have removed using a detergent with low flash point.

- Mated parts should always be refitted together. These parts will have seated themselves against one another during

running as a result of normal wear and tear and should never be mixed up with other similar parts when refitting.

- Certain components are matched-pair parts and should always be replaced as a set.

- Keep away from heat sources.

GENERAL INFORMATION

1 - 7

SR 50

REASSEMBLING THE COMPONENTS

DANGER

Never reuse a circlip or snap ring. These parts must always be replaced once they have been

removed.

When fitting a new circlip or snap ring, open the ends just enough to allow fitting to the shaft.

Make a rule to check that a newly fitted circlip or snap ring is fully housed in its groove.

Never use compressed air to clean bearings.

CAUTION All bearings must run freely with no hardness or noise. Replace any bearings that do not meet these

requirements.

- Use ORIGINAL aprilia SPARE PARTS only.

- Use the specified lubricants and consumables.

- Where possible, lubricate a part before assembly.

- When tightening nuts and bolts, start with the largest or innermost nut/bolt and observe a cross pattern. Tighten

evenly, in subsequent steps, until the specified torque has been achieved.

- Replace any self-locking nuts, gaskets, seals, circlips or snap rings, O-rings, split pins, bolts and screws which have

a damaged thread.

- Lubricate bearings abundantly before assembly.

- Make a rule to check that all components you have fitted are correctly in place.

- After repairing the motorcycle and after each service inspection, perform the preliminary checks, and then ride the

motorcycle in a private estate area or in a safe area away from traffic.

- Clean all mating surfaces, oil seal edges and gaskets before assembly. Apply a thin layer of lithium grease along the

edges of oil seals. Fit oil seals and bearings with the marking or serial number facing outwards (in view).

ELECTRICAL CONNECTORS

Disconnect electrical connectors as follows: failure to follow these instructions can seriously damage the connectors and

the wiring.

Press the special safety hooks, where fitted.

WARNING

Never separate two connectors by pulling on the wiring.

• Grasp both connectors and pull them in two opposite directions until they become separated.

• Remove dirt, rust, moisture, etc., from inside the connectors with compressed air.

• Ensure that the wires are securely crimped to the terminals inside each connector.

CAUTION: A connector will fit properly only in the matching connector and when inserted in the correct fitting position.

• Reconnect the two connectors. Make sure they are correctly coupled (if fitted with hooks, it should click audibly into

place).

TIGHTENING TORQUES

DANGER

Do not forget that the tightening torques of all wheel, brake, wheel shaft and other suspension parts

are essential to ensuring safe operation of the motorcycle and must be set to the indicated values.

Ensure that these values are always within the specified limits.

Regularly check the tightening torques on all fastenings, and always use a torque wrench when fitting

them.

Failure to observe these instructions can result in parts loosening or coming away, thus jamming a

wheel or creating other problems which would affect the handling of the motorcycle, potentially

resulting in serious injury or death.

GENERAL INFORMATION

1 - 8

SR 50

1.3. DANGEROUS ELEMENTS

1.3.1. WARNINGS

FUEL

DANGER

The fuel used to operate engines is highly flammable and becomes explosive under particular

conditions.

Refueling and maintenance operations should be carried out in a well-ventilated area, with the engine

off.

Do not smoke when refueling or in the proximity of sources of fuel vapors. Avoid contact with bare

flames, sources of sparks or any other source which may ignite the fuel or lead to explosion.

Take care not to spill fuel out of the filler, as it may ignite when in contact with hot engine parts.

In the event of accidental fuel spillage, make sure the affected area is fully dry before starting the

engine. Fuel expands with heat and when left under direct sunlight.

Never fill the fuel tank up to the rim. Tighten the filler cap securely after each refueling.

Avoid contact with the skin and the inhalation of vapors; do not swallow fuel or pour it from a

receptacle into another by means of a tube.

DO NOT DISPOSE OF FUEL IN THE ENVIRONMENT.

KEEP AWAY FROM CHILDREN.

Use only unleaded gasoline with a minimum octane rating of 95 RON and 85 MON.

LUBRICANTS

DANGER

Correct lubrication is essential to the safety of the motorcycle.

Failure to maintain the lubricant level or the use of incorrect, old or dirty lubricant can cause the

engine or transmission to seize, resulting in accident, serious injury or death.

Prolonged or repeated contact with gear fluid may cause severe skin damage.

Wash your hands thoroughly after handling.

Do not dispose oil in the environment.

For disposal, contact the nearest waste oil reclamation firm or the supplier.

WARNING

Avoid spillage when filling the vehicle with oil. Immediately clean up any spilt oil, which can damage

painted parts.

Oil on the tires can make them very slippery and dangerous to use.

In case of oil leaks, do not use the motorcycle. Identify the cause of the leak and repair it.

ENGINE OIL

DANGER

Prolonged or repeated contact with engine oil may cause severe skin damage.

Wash your hands thoroughly after handling.

Do not dispose oil in the environment.

For disposal, contact the nearest waste oil reclamation firm or the supplier.

Wear latex gloves during servicing.

FRONT FORK FLUID

DANGER

Front suspension response can be modified to a certain extent by changing damping settings and/or

selecting a particular grade of oil. Standard oil is SAE 20 W. Choose suitable viscosity grades

according to the desired set-up (SAE 5W softer, 20W stiffer).

The two grades can also be mixed in varying solutions to obtain the desired response.

GENERAL INFORMATION

1 - 9

SR 50

BRAKE FLUID

CAUTION This vehicle is fitted with front and rear disc brakes. Each brake system is operated by an independent

hydraulic circuit. The information provided below applies to both brake systems.

DANGER

Do not drive the vehicle if the brakes are worn or not operating correctly. The brakes are the vehicle’s

most important safety component and using the vehicle with the brakes in less than perfect operating

condition comprises a high probability of traffic accident, which can result in serious injury or death.

The brakes are significantly less effective on a wet road surface.

DANGER

If the road surface is wet, maintain a double braking distance, as both the brakes and the grip of the

tires are significantly less effective in such conditions.

Water on brakes, whether due to a recent wash or picked up from a wet road surface, puddles or

drains, can result in significantly reduced brake efficiency.

Failure to observe these instructions can result in serious accidents, with the risk of serious personal

injury or death.

The brakes are essential to your safety. Do not drive the vehicle if the brakes on not in perfect

operating condition.

Always check the brakes before riding the motorcycle.

Brake fluid is an irritant. Avoid contact with eyes or skin.

In the event of accidental contact, wash affected body parts thoroughly. In the event of accidental

contact with the eyes, contact an eye specialist or seek medical attention.

DO NOT DISPOSE OF BRAKE FLUID IN THE ENVIRONMENT.

KEEP AWAY FROM CHILDREN.

Avoid spillage. Brake fluid can damage plastic or painted parts.

DANGER

Do not use brake fluids other than the specified type. Never mix different types of fluids to top up the

level, as this will damage the brake system.

Do not use brake fluid from containers which have been kept open or in storage for long period of

time.

Any sudden changes in slack or hardness in the brake levers are warning signs of problems with the

hydraulic circuits.

Ensure that the brake discs and brake linings have not come in contact with oil or grease. This is

particularly important after servicing or inspections.

Ensure the brake lines are not twisted or worn.

Avoid accidental entry of water or dust into the circuit.

Wear latex gloves when servicing the hydraulic circuit.

DISC BRAKES

DANGER

The brakes are the vehicle’s most important safety component.

To ensure your personal safety, they must be in perfect working order and should be checked before

every ride.

Dirty pads must be replaced. Dirty or oily discs must be cleaned with a high-quality degreasing

product.

If the vehicle is often used on wet road surfaces or on dusty or rough tracks, or in case of use in

competition, reduce the service intervals by half.

Check brake pads for wear.

When the brake pads are worn, the fluid level lowers to compensate for the wear.

The front brake fluid reservoir is on the RH side of the handlebar, next to the front brake lever.

The rear brake fluid reservoir is located under the RH side fairing.

Do not use the vehicle if the brake system leaks fluid.

GENERAL INFORMATION

1 - 10

SR 50

COOLANT

DANGER

Coolant is toxic when swallowed and is an irritant. Contact with the eyes or skin can cause irritation.

In the event of contact with the skin or eyes, rinse repeatedly with abundant water and seek medical

attention. If swallowed, induce vomiting, rinse mouth and throat with abundant water and seek

medical attention immediately.

DO NOT DISPOSE OF IN THE ENVIRONMENT.

KEEP AWAY FROM CHILDREN.

DANGER

Avoid spilling coolant onto hot engine parts, as it may ignite and produce invisible flames. Wear latex

gloves when servicing.

Do not ride the vehicle when coolant is below the minimum level.

Coolant mixture is a 50% solution of water and antifreeze. This is the ideal solution for most operating temperatures and

provides good corrosion protection.

This solution is also suited to the warm season, as it is less prone to evaporative loss and will reduce the need for top-

ups.

In addition, less water evaporation means fewer mineral salts depositing in the radiator, which helps preserve the

efficiency of the cooling system.

When the temperature drops below 0°C, check the cooling system frequently and add more antifreeze (up to 60%

maximum) to the solution, if needed.

Use distilled water in the coolant mixture. Tap water will damage the engine.

Refer to the chart given below and add water with the quantity of antifreeze to obtain a solution with the desired freezing

point:

Freezing point C° (-°F) Coolant % of volume

-20° (-4) 35

-30° (-22) 45

-40° (-40) 55

CAUTION: Coolants have varying specifications. The degree of protection is written on the label.

WARNING

Use only nitrite-free antifreeze and corrosion inhibitors with a freezing point of -35°C (-31°F) as a

minimum.

TIRES

WARNING

An over inflated tire results in a hard, uncomfortable and less secure ride.

Over inflation also affects grip, especially on curves and wet surfaces.

An under inflated tire (insufficient pressure) can slip on the wheel rim, resulting in loss of control.

Under inflation also affects grip and handling, as well as braking efficiency.

Tire replacement and repair, and wheel servicing and balancing are delicate operations. They should

be carried out using adequate tools and are best left to experienced mechanics.

New tires may be covered with a thin layer of protective coating which is slippery. Drive carefully for

the first few kilometers (miles).

Never use any kind of rubber treatment product on the tires.

In particular, do not allow the tire to come in contact with liquid fuel, which rapidly deteriorates the tire

rubber.

In case of contact with oil or fuel, do not clean but replace the tire.

DANGER

Some of the factory-assembled tires on this vehicle are equipped with wear indicators.

There are various types of wear indicators.

For more information on how to check wear, contact your Dealer.

Check the wear visually and have the tires replaced when they are worn.

If a tire deflates during a ride, do not attempt to continue the trip.

Avoid sudden braking or steering maneuvers, and do not decelerate rapidly.

Slowly decelerate and move to the edge of the road braking with the engine until you come to a

standstill.

Failure to observe these instructions can result in serious accidents, with the risk of serious personal

injury or death.

Never use tube tires on tubeless tire rims, or vice versa.

GENERAL INFORMATION

1 - 11

SR 50

1.4. RUNNING-IN

1.4.1. RUNNING-IN

Proper engine running in is essential to preserving engine life and performance over time.

Twisty roads and gradients are ideal to break in engine, suspension and brakes effectively.

Varying speed frequently is also recommended.

This will vary the amount of stress placed on vehicle components continuously, allowing engine parts to cool down when

less stressed.

While it is important to put a certain amount of stress to engine components during the running-in period, it is equally

important to spare the engine at this stage in the vehicle’s life.

WARNING

Top acceleration performance is only obtained after covering the first 500 km (312 mi).

Observe the following instructions:

• Avoid harsh accelerations and do not flip the throttle open abruptly when the engine is running at low speed, both

during and after the running-in period.

• Until you have covered the first 100 km (62 mi), use the brakes gently and avoid harsh, prolonged braking. This will

help the brake pads bed in properly against the brake disc.

• During the first 300 km (187 mi) do not keep the throttle twistgrip open for more than half of its stroke for long

periods of time.

• From 300 to 500 km (187 - 312 mi), do not keep the throttle twistgrip open for more than three fourths of its stroke

for long periods of time.

WARNING

After covering the first 1000 km (625 mi), perform the checks listed in the "After running-in" column,

see REGULAR SERVICE INTERVALS CHART to avoid personal injury to yourself or third persons, or

vehicle damage

GENERAL INFORMATION

1 - 12

SR 50

1.5. VEHICLE IDENTIFICATION

1.5.1. POSITION OF THE SERIAL NUMBERS

CAUTION Altering the vehicle identification numbers is a

legal offence. Altering the frame number invalidates the

warranty.

FRAME NUMBER

The frame number (A) is stamped on the frame central tube.

To read it, it is necessary to remove the indicated cover (1).

CAUTION The cover (1) can be fitted only in one position.

The tabs (2) are on the sides.

ENGINE NUMBER

The engine number is stamped near the lower support of the

rear shock absorber.

DIGIT MEANING

1. Manufacturer’s identification alphanumeric code.

2. Vehicle type.

3. Type of cycle, line, Engine type, and Engine Net Brake

Horse Power.

4. #= Check digit number.

5. Model year.

6. Plant location

(N = NOALE-VE- ,

S = SCORZÉ -VE).

7. Sequential serial number.

GENERAL INFORMATION

1 - 13

SR 50

1.6. POSITION OF THE ADHESIVE WARNING LABELS

1.6.1. POSITION OF THE ADHESIVE WARNING LABELS

1

2

Page is loading ...

APRILIA Air-injection 50 cc Owner's manual

This manual is also suitable for

APRILIA Air-injection 50 cc Owner's manual

Related papers

Other documents