Aprilia SR 50 Factory Service Repair Manual

Service and repair manual SR 50 - 964X aprilia part # 8140222

1 SR 50 - &/2%7/2$ – This manual contains information covering normal servicing procedures. – The information and illustrations contained in this manual are current as of the manual’s publication. Since aprilia s.p.a. strives to always improve the quality and usefulness of its vehicles, changes may be made to the vehicles at any time. Thus, it is imperative that users of this manual understand that some information may be out of date for some vehicles. Be sure that the information in this manual applies to the vehicle that you are servicing before you begin any service operations. – This publication is intended for aprilia dealers and their trained and qualified mechanics. The description of many service and repair operations is intentionally omitted, as it is assumed that the users of this manual have basic mechanical training, basic knowledge of the procedures regarding motor vehicle repair, and have available to them all current information published by aprilia concerning the vehicle. Without these things, the repair or servicing of the vehicle could be affected and could lead to a dangerous condition or accident for the servicing mechanic or the operator. This manual does not describe all of the procedures necessary to repair and service the vehicle in detail. Therefore, it is important to be particularly careful in order to avoid any damage to the vehicle, its parts, or to cause injury to the mechanic or the rider. Changes in the technical specifications and servicing procedures that become necessary as a result of changes to aprilia vehicles will be documented and distributed to all aprilia dealers. Therefore, it is necessary that the latest aprilia information be kept available to the servicing mechanics. If you have questions regarding repair and servicing procedures, contact the aprilia Consumer Service (A.C.S.). A.C.S. technical counselors will be able to assist you with any problems that you might face. For further information refer to: – ENGINE SERVICE AND REPAIR MANUAL # 921 (I-UK-F-D-E); – ENGINE SPARE PARTS CATALOGUE # 715; – ENGINE SPARE PARTS CATALOGUE 1 # 716; – “CHASSIS PARTS” SPARE PARTS CATALOGUE # 515V. – “CHASSIS PARTS” SPARE PARTS CATALOGUE 1 # 516V. aprilia s.p.a. reserves the right to modify any of its models in any manner at any time. This manual is protected by copyright in all countries. Re- production by any means, print or electronic, is prohibited. The mention of products or services supplied by entities other than aprilia is made for information purposes only. aprilia is not responsible for the performance or use of any product not specifically recommended or endorsed by aprilia. First edition: july 1999 Second edition: Reprint: june 2000 Produced and printed by: editing division Soave (VERONA) - Italy Tel. +39 - 045 76 11 911 Fax +39 - 045 76 12 241 E-mail: customer@stp.it www.stp.it On behalf of: aprilia Consumer Service s.p.a. via Noalese, 156 - 30036 Santa Maria di Sala (VE) - Italia Tel. +39 - 041 57 86 101 Fax +39 - 041 57 86 100 www.aprilia.com ).42/$5#4)/. This manual is divided into sections, chapters and para- graphs, by subject. The procedures described are laid out in single operation, and each operation is indicated by a ◆ . The numbered parts shown in the figures are identified in the text with the number in parentheses or with the symbol repre- senting them. Example: (the following text is generic and does not refer to this specific vehicle): 3!&%497!2.).'3 Throughout this manual, you will see the following symbols: aWARNING When you find this symbol on the vehicle or in the vehicle, this indicates that a potential for serious personal injury or death exists. Failure to follow this warning may result in serious risk of personal injury or death, of the mechanic working on the vehicle, the operator of the vehicle, or the general public. It also indicates that serious and permanent damage to the vehicle is possible. aCAUTION This statement indicates a potential hazard which may result in some personal injury, or damage to the vehicle. NOTE The word “NOTE” in this manual precedes important information or instructions to which special attention must be given. section chapter safety warning aWARNING Never turn the key to position “s” while the vehicle is being operated. If you do so, you will lose control of the vehicle, and a crash will ensue. paragraph OPERATION operation To lock the steering: ◆ Turn the handlebar completely to the left. position (2) ◆ Turn the key (2) to position “m” (OFF) and press it. symbol “s” ◆ Release the key and rotate it to position “ s” (LOCK). ◆ Remove the key.

2 SR 50 - '%.%2!,3!&%4925,%3 #!2"/.-/./8)$% If it is necessary to let the engine run in order to carry out some work, make sure that the area in which you are operating is properly ventilated. Never run the engine in en- closed spaces. If it is necessary to work indoors, use an exhaust evacuation system. aWARNING The exhaust fumes contain carbon monoxide, a poisonous gas that can cause loss of consciousness and even death. Run the engine in an open area or, if it is necessary to work indoors, use an exhaust evacuation system. '!3/,).% Work in a well ventilated area. Keep cigarettes, flames or sparks away from the work area and from the place where gasoline is stored. aWARNING Gasoline is extremely flammable and becomes explosive under certain conditions. KEEP AWAY FROM CHILDREN. (/4#/-0/.%.43 aWARNING The engine and the components of the exhaust system become very hot and remain hot for some time after the engine has been stopped. Before handling these components, wear insulating gloves or wait until the engine and the exhaust system have cooled down. 53%$%.').%/), aWARNING Use latex gloves for the maintenance operations that require contact with used oil. Used engine oil may cause skin cancer if repeatedly left in contact with the skin for prolonged periods. Although this is un- likely unless you handle used oil on a daily basis, it is advisable to thoroughly wash your hands with soap and water after handling used oil. KEEP AWAY FROM CHILDREN. "2!+%&,5)$ aCAUTION The brake fluid can damage painted, plastic or rubber parts. When performing maintenance operations on the braking system, put a clean shop towel on these parts. Always wear goggles when servicing the brake system with brake fluid. Brake fluid is extremely de- structive to your eyes. If you should accidentally get brake fluid in your eyes, flush immediately with a large quantity of cool clear water and seek professional medical assistance immediately. KEEP AWAY FROM CHILDREN. #//,!.4 In certain conditions, the ethylene glycol contained in the engine coolant is flammable: its flame is invisible, but you can be burned anyway. aWARNING Avoid spilling the engine coolant on the exhaust system or on the engine components. They may be hot enough to cause the coolant to ignite and burn without a visible flame. The coolant (ethylene glycol) can cause skin irritation and is poisonous if swallowed. Engine coolant is extremely attractive to animals and pets, as well as being extremely toxic to them. Do not leave coolant in an open container where animals may be able to drink it. KEEP AWAY FROM CHILDREN. Do not remove the radiator cap when the engine is hot. The coolant is under pressure and may cause burns. "!44%29(9$2/'%.'!3!.$ %,%#42/,94% aWARNING The battery gives off explosive gases; keep cigarettes, flames and sparks away from the battery. Pro- vide adequate ventilation when operating or recharging the battery. The battery contains sulphuric acid (electrolyte). Contact with the skin or the eyes may cause serious burns.

3 SR 50 - Always wear tight fitting goggles and protective clothing when handling battery electrolyte. It is particularly important for you to protect your eyes, since even a minuscule amount of battery acid can destroy your vision. Should you accidentally get even the smallest amount of battery acid on your skin or eyes, immediately flush with large quantities of clear cool water and immediately seek professional medical attention. The electrolyte is poisonous. If the electrolyte is accidentally swallowed, drink large quantities of water or milk and then milk of magnesia or vegetable oil. Seek professional medical attention immediately. KEEP AWAY FROM CHILDREN. 02%#!54)/.3 !.$'%.%2!,).&/2-!4)/.3 Follow with care these recommendations when repairing, disassembling and reassembling the vehicle. aWARNING The use of naked flames is forbidden for any type of operation. Before commencing any service or inspection operation on the vehicle, switch off the engine and remove the key, wait until the engine and the exhaust system have cooled down and, if possible, raise the vehicle with the suitable equipment onto firm flat ground. The brakes also get quite hot in operation. Be sure that the brakes have cooled thoroughly before begin- ning any service operations. In order to avoid burns, be careful not to touch any parts of the engine or exhaust systems which have not cooled down completely. Avoid the temptation to hold any hardware or other part of the vehicle in your mouth while working on the motorscooter. No part of the motorscooter is edible and some of the coatings, plastics, and platings, etc. are noxious if not outright toxic. If not expressly described, the reassembly of the units is carried out by reversing the order of operations. Handle fuel with the greatest caution. See gasoline warning above. Never use fuel as a solvent for cleaning the vehicle. Disconnect the negative cable (–) from the battery when electric welding. When two or more persons are working together, make sure that each is working in safe conditions. Be sure that all the mechanics working on any one vehicle are thoroughly briefed as what each will be doing, and insure that one mechanic is responsible for insuring that all safety related items, such as tightening torques, are properly considered. BEFORE DISASSEMBLY – Remove any dirt, mud, dust and foreign matters from the vehicle before disassembling the components. – Use, when necessary, the special tools designed for this vehicle. DISASSEMBLING THE COMPONENTS – Before disconnecting the joints (pipes, cables, etc.), mark the positions on all of them and mark them with different distinguishing signs. Each piece must be marked clearly, in order not to have problems during installation. – Clean and wash carefully any disassembled parts with low inflammability detergents. – Keep the parts that are used in pairs together, since they have adapted to each other following the normal wear. Some components must be used together or replaced completely. – Keep away from heat sources. REASSEMBLING THE COMPONENTS aCAUTION Never use a circlip twice. When a circlip is removed, it must be replaced with a new one. When assembling a new circlip be careful not to stretch its ends more than strictly necessary to put it on the shaft. After installing a circlip, make sure that it is completely and firmly inserted in its seat. Do not use compressed air to clean the bearings. NOTE The bearings must rotate freely, without halting or noise otherwise they must be replaced. – Use only original aprilia SPARE PARTS. – Use the recommended lubricants. – Always lubricate parts before reassembly. – When tightening screws, nuts, and bolts, start with the largest diameter fasteners. When several fasteners are arranged in a pattern, start with the innermost fasteners, and tighten diagonally across the pattern. Tighten each fastener successively before applying the final tightening torque. – Always replace gaskets, grommets, circlips, O-rings and split pins (cotter pins) with new ones. Before assembling, clean all mating surfaces carefully, removing all traces of the old gasket and gasket seal- ing compound. Also carefully clean any oil seal you plan to reuse. It is recommended that all oil seals be replaced each time they are disassembled. Gaskets should never be reused. Apply a thin film of lithium based grease to all oil seals before assembling. Install oil seals and bearings with the identification mark or serial number facing outward (visible). Copiously lubricate bearings before installation and before assembly. – Make sure that each component has been reassem- bled correctly. – After any repair or periodic maintenance operation is carried out, the vehicle must be test ridden in an area away from traffic and other hazards.

4 SR 50 - (/74/53% 9/523%26)#%!.$2%0!)2-!.5!, ADVICE FOR CONSULTATION – This manual is divided into chapters, each one of which corresponds to a category of main components. To consult them, see the general index, p. 8 (TABLE OF CONTENTS). – If not expressly indicated otherwise, for the reassembly of the units repeat the disassembly operations in re- verse order. – The terms “right” and “left” are referred to the rider seated on the vehicle in the normal riding position. – For normal maintenance operations and for the use of the vehicle, consult the “USE AND MAINTENANCE” manual. The operations preceded by this symbol must be repeated on the opposite side of the vehicle. NOTE When asking your Dealer for spare parts, specify the spare parts code indicated on the SPARE PARTS IDENTIFICATION LABEL. Write down the identification code in the space here below, in order to remember it also in case of loss or deteri- oration of the label. The label is stuck on the right beam of the frame; to be able to read it, remove the right inspection cover, see p. 20 (REMOVING THE RIGHT AND LEFT INSPECTION COVERS). In this manual the various versions are indicated by the following symbols: & optional 1 liquid-cooled version 3 drum brake version VERSION: I Italy V Poland U United Kingdom % Israel A Austria K South Korea P Portugal M Malaysia " Finland R Chile B Belgium Q Bermuda D Germany - United States of America F France ^ Australia E Spain Í Brazil G Greece ° South Africa O Holland Î New Zealand C Switzerland [ Canada  Denmark ` Croatia J Japan Ñ Slovenia S Singapore ★

5 SR 50 - %,%#42)#!,#/..%#4/23 The electrical connectors must be disconnected as follows. Failure to follow these procedures will irreparably damage the connector and wiring. ◆ Press in the click tab. aCAUTION Do not pull the cables to disconnect the two connectors. ◆ Grasp the two connectors and disconnect them by pulling in opposite directions. ◆ If dirt, rust, dust, or moisture is seen on the connector, blow out the connector with air. ◆ Make sure that the cables are correctly crimped to the terminals positioned inside the connectors. NOTE The two halves of the connector fit together properly in only one orientation. Ensure that the connector is properly aligned before attempting to assemble it. ◆ Press the connectors firmly together, listening for the typical “click” sound for those connectors provided with a click tab. Ensure that both halves of the connectors are firmly pressed together. 4)'(4%.).'4/215%3 The table below shows tightening torques for screws and bolts with metric ISO threads, as is used in this vehicle. These are general values to be used if no specific value is given in this manual or other aprilia service literature. For specific fasteners, see p. 11 (TIGHTENING TOR- QUES). If not otherwise indicated, the tightening torques shown should be used for clean and dry threads, at room temperature NOTE To avoid damage to the threads, tighten screws and bolts as follows: ◆ Run up the fasteners finger tight. ◆ Applying half the prescribed tightening torque, tighten the fasteners that are diametrically opposite each other: (A) and (B); (C) and (D). ◆ Repeat, applying the prescribed tightening torque. NOTE In this way the pressure exerted by the fasten- ing elements will be uniformly distributed on the joint sur- face. Screw or bolt thread Spanner Tightening torque ftlb (Nm) M 6 10 4.34 6 M 8 12 10.84 15 M 10 14 21.70 30 M 12 17 39.79 55 M 14 19 61.49 85 M 16 22 94.03 130

6 SR 50 - 0/3)4)/./&4(%7!2.).'!$(%3)6%,!"%,3

7 SR 50 - Ref. Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Muffler stamping. 15 Ref. Description

8 SR 50 - 4!",%/&#/.4%.43 FOREWORD ............................................................................................ 1 INTRODUCTION ...................................................................................... 1 SAFETY WARNINGS............................................................................... 1 GENERAL SAFETY RULES .................................................................... 2 CARBON MONOXIDE.............................................................................. 2 GASOLINE ............................................................................................... 2 HOT COMPONENTS ............................................................................... 2 USED ENGINE OIL .................................................................................. 2 BRAKE FLUID .......................................................................................... 2 COOLANT ................................................................................................ 2 BATTERY HYDROGEN GAS AND ELECTROLYTE ............................... 2 PRECAUTIONS AND GENERAL INFORMATIONS ........................................................... 3 BEFORE DISASSEMBLY ........................................................................ 3 DISASSEMBLING THE COMPONENTS ................................................. 3 REASSEMBLING THE COMPONENTS .................................................. 3 HOW TO USE YOUR SERVICE AND REPAIR MANUAL ............................................... 4 ELECTRICAL CONNECTORS................................................................. 5 TIGHTENING TORQUES......................................................................... 5 POSITION OF THE WARNING ADHESIVE LABELS ............................. 6 TECHNICAL DATA................................................................................... 9 TIGHTENING TORQUES....................................................................... 11 LUBRICANT CHART .............................................................................. 11 TROUBLESHOOTING ........................................................................... 12 REGULAR SERVICE INTERVALS CHART .......................................... 14 IDENTIFICATION DATA........................................................................ 15 ARRANGEMENT OF THE MAIN ELEMENTS.................................................................... 15 ARRANGEMENT OF THE INSTRUMENTS .......................................... 16 INSTRUMENTS AND INDICATORS ..................................................... 16 THROTTLE ............................................................................................ 16 CHECKING THE OPERATION OF THE THROTTLE CONTROL ............................................................ 16 IDLING ADJUSTMENT .......................................................................... 17 ADJUSTING THE THROTTLE CONTROL ............................................ 18 FAIRINGS .............................................................................................. 19 REMOVING THE PASSENGER GRAB HANDLE ...................................................... 19 REMOVING THE NUMBER PLATE-HOLDER....................................... 19 REMOVING THE LOWER GUARD OF THE REAR PART OF THE FAIRING ............................................... 19 REMOVING THE REAR PART OF THE FAIRING ................................ 19 REMOVING THE RIGHT AND LEFT INSPECTION COVERS .............. 20 REMOVING THE LOWER SHIELD COVER .......................................... 20 REMOVING THE COVER SUPPORT ELEMENT ..................................................... 21 REMOVING THE FRONT COVER........................................................ 21 REMOVING THE BATTERY / TOOL KIT COMPARTMENT COVER... 21 REMOVING THE FRONT INNER SHIELD ................................................................. 22 REMOVING THE REAR-VIEW MIRRORS ................................................................. 22 REMOVING THE FOOTBOARD ............................................................ 23 REMOVING THE FRONT MUDGUARD ................................................ 23 REMOVING THE LOWER HANDLEBAR COVER ................................. 24 PARTIAL REMOVAL OF THE UPPER HANDLEBAR COVER.............. 24 REMOVING THE CRASH HELMET COMPARTMENT complete with saddle ................................. 25 REMOVING THE FRONT SHIELD COVER........................................... 25 REMOVING THE REAR MUDGUARD................................................... 26 INSTALLING THE REAR MUDGUARD EXTENSION .......................... 27 REMOVING THE COVER OF THE REAR PART OF THE FAIRING ............................................... 27 REMOVING THE FRONT OUTER SHIELD ........................................... 28 REMOVING THE LOWER SHIELD........................................................ 28 FUEL TANK ........................................................................................... 29 FUEL ...................................................................................................... 29 CHECKING THE FUEL VALVE.............................................................. 30 DRAINING THE FUEL TANK ................................................................. 30 REMOVING THE FUEL VALVE ............................................................. 31 CHECKING THE FUEL LEVEL GAUGE UNIT....................................... 32 REMOVING THE FUEL LEVEL GAUGE UNIT ...................................... 32 REMOVING THE COMPLETE FUEL TANK .......................................... 32 2 STROKE OIL TANK............................................................................ 33 CHECKING............................................................................................. 33 DRAINING .............................................................................................. 33 REMOVAL .............................................................................................. 33 BLEEDING THE 2 STROKE OIL TANK ................................................. 34 COOLING SYSTEM 1 ....................................................................... 35 COOLANT 1....................................................................................... 35 CHECKING THE COOLANT LEVEL AND TOPPING UP 1 ......................................................................... 36 DRAINING THE COOLANT SYSTEM 1 ............................................ 37 CHANGING THE COOLANT 1 .......................................................... 38 BLEEDING THE COOLANT SYSTEM 1 ........................................... 39 REMOVING THE RADIATOR 1......................................................... 40 REMOVING THE COOLANT PUMP 1 .............................................. 40 REMOVING THE EXPANSION TANK 1............................................ 41 REMOVING THE COOLANT TEMPERATURE TERMISTOR 1....................................................... 41 BULBS ................................................................................................... 42 HEADLIGHT........................................................................................... 42 ADJUSTING THE HEADLIGHT BEAM VERTICALLY ............................................................................. 42 ADJUSTING THE HEADLIGHT BEAM HORIZONTALLY ........................................................................ 43 CHANGING THE HEADLIGHT BULBS ................................................ 44 REMOVING THE HEADLIGHT .............................................................. 45 FRONT AND REAR DIRECTION INDICATORS .................................................................... 45 CHANGING THE BULB ......................................................................... 45 REAR LIGHT.......................................................................................... 46 CHANGING THE BULBS ....................................................................... 46 REMOVING THE REAR LIGHT ............................................................. 46 CHANGING THE LICENSE PLATE BULB ............................................ 47 DASHBOARD ........................................................................................ 47 CHANGING THE BULBS ....................................................................... 47 REMOVING THE COMPLETE DASHBOARD ....................................... 48 REMOVING THE DASHBOARD GLASS............................................... 48 ELECTRIC CONTROL SUPPORTS...................................................... 48 REMOVING THE HANDLEBAR CONTROLS........................................ 48 BRAKES ................................................................................................ 49 DISC BRAKES....................................................................................... 50 FRONT AND REAR BRAKE ................................................................. 50 CHECKING ............................................................................................ 51 TOPPING UP ......................................................................................... 51 REAR DRUM BRAKE 3 ................................................................... 53 FRONT WHEEL ..................................................................................... 54 DISASSEMBLY ...................................................................................... 54 CHECKING ............................................................................................ 55 REASSEMBLY ....................................................................................... 55 REAR WHEEL ....................................................................................... 57 DISASSEMBLY ...................................................................................... 57 GREASING THE REAR BRAKE CAM PIN 3....................................................... 58 BRAKE CALIPERS ............................................................................... 59 REMOVING THE FRONT BRAKE CALIPER......................................... 59 REMOVING THE REAR BRAKE CALIPER ........................................... 60 BRAKE PADS........................................................................................ 61 CHECKING WEAR OF THE BRAKE PADS ......................................... 61 CHANGING THE BRAKE PADS............................................................ 61 BLEEDING THE BRAKING SYSTEM................................................... 62 BRAKE SHOES 3 ............................................................................. 63 CHECKING THE SHOE WEAR 3...................................................... 63 CHECKING THE THICKNESS OF THE FRICTION MATERIAL 3...................................................... 64 REPLACING THE SHOES 3 ............................................................. 64 TRANSMISSION.................................................................................... 65 CHECKING THE TRANSMISSION OIL LEVEL..................................... 65 CHANGING THE TRANSMISSION OIL................................................. 65 CHECKING THE ENGINE FULCRUM AXIS ......................................... 66 WHEELS / TIRES .................................................................................. 66 INSPECTING THE WHEELS ................................................................. 66 TIRES..................................................................................................... 67 TIRE PRESSURE .................................................................................. 68 FORK HEAD .......................................................................................... 69 CHECKING THE STEERING ................................................................ 69 ADJUSTING THE BEARING PLAY ....................................................... 69 REMOVING THE FORK HEAD BEARINGS .......................................... 70 FRONT FORK........................................................................................ 71 CHECKING THE FORK OIL LEVEL ...................................................... 71 REMOVING THE COMPLETE FORK.................................................... 71 REMOVING THE LOWER FORK LEG (with installed fork) .............................................................................. 72 DISASSEMBLING THE LOWER FORK LEG ....................................... 72 REAR SUSPENSION............................................................................. 73 REMOVAL.............................................................................................. 73 EXHAUST SILENCER ........................................................................... 73 DISASSEMBLY ...................................................................................... 73 AIR CLEANER....................................................................................... 74 REMOVAL.............................................................................................. 74 CLEANING THE AIR FILTER ................................................................ 74 IGNITION SWITCH / STEERING LOCK................................................ 74 REMOVAL.............................................................................................. 74 BATTERY............................................................................................... 75 BATTERY STORAGE ........................................................................... 76 CHECKING AND CLEANING THE TERMINALS .................................................................................. 76 REMOVING THE BATTERY ................................................................. 76 CHECKING THE ELECTROLYTE LEVEL ............................................. 77 RECHARGING THE BATTERY ............................................................. 77 INSTALLING THE BATTERY................................................................. 77 ENGINE.................................................................................................. 78 REMOVING THE ENGINE FROM THE FRAME ................................... 78 ENGINE 1 (liquid-cooled version) ......................................................................... 80 REMOVING THE ENGINE FROM THE FRAME 1................................................ 80 ENGINE MOUNTING BUSHINGS ......................................................... 81 REMOVAL.............................................................................................. 81 ELECTICAL SYSTEM ........................................................................... 82 CONTENTS............................................................................................ 82 CHECKING THE THERMISTOR OPERATION 1 ................................................. 94

9 SR 50 - 4%#(.)#!,$!4! DIMENSIONS Max. length 70.47 in (1,790 mm) Max. length (with rear mudguard extension) 74.02 in (1,880 mm) Max. width 28.35 in (720 mm) Max. height (front part of the fairing included) 45.67 in (1,160 mm) Seat height 32.68 in (830 mm) Wheelbase 49.21 in (1,250 mm) Min. ground clearance 6.30 in (160 mm) Curb weight 207.23 lb (94 kg) Curb weight 1 218. 26 lb (99 kg) ENGINE Type 2-stroke with controlled ignition Number of cylinders 1 Total displacement 3.01 cu in (49.26 cm ) Bore / stroke 1.57 in / 1.54 in (40 mm / 39.2 mm) Compression ratio 12.5 ± 0.5:1 Starting electric + kick starter Engine idling rpm 1800 ± 100 rpm Clutch automatic centrifugal dry clutch Change gear Automatic stepless variator Cooling with forced air Cooling 1 liquid cooled CAPACITY Fuel (reserve included) 2.11 US gal (8 L ) Fuel reserve 0.53 US gal (2 L ) Transmission oil 3.72 US fl oz (110 cm ) 2 stroke oil (reserve included) 1.69 US qt (1.6 L ) 2 stroke oil reserve 0.53 US qt (0.5 L ) Coolant 1 0.32 US gal (1.2 L ) (50% water + 50% antifreeze with ethylene glycol) Seats 2 Vehicle max. load (driver+passenger+luggage) 396.83 lb (180 kg) Gross weight limit (GVWR) (*) 620 lb (281 kg) Permissible wheel loads (GAWR) (*) – front 200 lb (91 kg) – rear 420 lb (190 kg) (*) These two weights: Gross Vehicle Weight Rating (GVWR) and Gross Axle Vehicle Weight Rating (GAWR); are stamped on the certi- fication plate positioned on the front part of the frame, see pag. 15 (IDENTIFICATION DATA) (FRAME NUMBER). TRANSMISSION Speed change gear automatic and stepless Primary V-belt Ratios minimum for stepless change: 2.6 maximum for stepless change: 0.862 Secondary with gears

Aprilia SR 50 Factory Service Repair Manual

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