EasyManua.ls Logo

Sym Orbit 125 User Manual

Sym Orbit 125
176 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Page #1 background imageLoading...
Page #1 background image
SERVICE MANUAL
Orbit 125
Question and Answer IconNeed help?

Do you have a question about the Sym Orbit 125 and is the answer not in the manual?

Sym Orbit 125 Specifications

General IconGeneral
Displacement124.6 cc
Front SuspensionTelescopic Fork
Front BrakeDisc
Rear BrakeDrum
Wheelbase1280 mm
HeadlampHalogen
Engine Type4-Stroke, Single Cylinder
Starting MethodKick start

Summary

FORWARD

HOW TO USE THIS MANUAL

MECHANISM ILLUSTRATIONS

GENERAL INFORMATION AND TROUBLE DIAGNOSIS

SYMBOLS AND MARKS

Explains symbols used for service procedures, warnings, and cautions.

GENERAL SAFETY

Covers critical safety precautions for engine operation, fuel, battery, and brake system handling.

SERVICE PRECAUTIONS

Guidelines on using genuine parts, correct tools, metric system, and component handling.

SPECIFICATIONS

Lists key technical data for dimensions, weight, engine, performance, tires, and brakes.

TORQUE VALUES (ENGINE)

Details specific torque values for engine bolts, nuts, and screws during assembly and maintenance.

TORQUE VALUES (FRAME)

Lists specific torque values for frame components and standard reference values.

TROUBLES DIAGNOSIS - ENGINE STARTING

Diagnostic flowchart for engine starting issues, probable causes, and checks.

TROUBLES DIAGNOSIS - ENGINE SLUGGISHNESS

Troubleshooting flowcharts for engine sluggishness (low power) and potential causes.

TROUBLES DIAGNOSIS - CLUTCH/DRIVING PULLEY

Addresses troubleshooting for clutch and driving pulley system issues.

LUBRICATION POINTS

Illustrates key lubrication points on the motorcycle for maintenance.

MAINTENANCE INFORMATION

PRECAUTIONS IN OPERATION

General precautions and specifications for motorcycle operation and maintenance, including fluid capacities.

PERIODICAL MAINTENANCE SCHEDULE

Schedule for periodic maintenance tasks, including inspection, cleaning, and replacement intervals.

LUBRICATION SYSTEM

Details engine oil checks, changes, and strainer cleaning, including oil specifications.

FUEL SYSTEM

Covers fuel pipe inspection, filter replacement, and safety warnings for gasoline.

AIR CLEANER

Explains removal, inspection, and replacement of the air cleaner element.

THROTTLE VALVE OPERATION

Checks and adjustments for throttle valve cable and handle free play.

VALVE CLEARANCE ADJUSTMENT

Guides valve clearance adjustment when the engine is cold.

CARBURETOR IDLE SPEED ADJUSTMENT

Adjusts idle speed and emission values using an exhaust analyzer.

IGNITION SYSTEM

Explains checking ignition timing using an ignition light.

SPARK PLUG

Information on recommended spark plug, gap, torque, and confirmation.

CYLINDER COMPRESSION PRESSURE

Measures compression pressure and identifies low pressure issues.

DRIVING SYSTEM

Covers inspection and replacement of driving belt and clutch pad.

STEERING SYSTEM

Checks steering handle smoothness and adjusts the top bearing.

SUSPENSION SYSTEM

Advises on shock absorber condition and checks for front and rear units.

FRONT DISK BRAKE SYSTEM

Details brake fluid checks, filling, and air bleeding for the front disc brake.

DRUM BRAKE SYSTEM

Measures and adjusts free play for front and rear drum brake levers.

WHEEL/TIRE

Checks tire pressure, tread depth, wear limits, and tire specifications.

BATTERY

Instructions for battery removal, cable disconnection, cleaning, and installation.

HEADLIGHT ADJUSTMENT

Guides on adjusting the headlight beam height according to regulations.

NUTS, BOLTS TIGHTEN

Emphasizes checking all nuts and bolts for frame security during maintenance.

LUBRICATION SYSTEM

MECHANISM DIAGRAM

Illustrates the lubrication system mechanism and oil flow paths.

OPERATIONAL PRECAUTIONS

General information and specifications for engine oil quantity, viscosity, and gear oil.

TROUBLE DIAGNOSIS

Lists common lubrication issues like low oil level, leaks, and low pressure.

ENGINE OIL

Details checking engine oil level and performing oil replacement, including torque values.

CLEANING ENGINE OIL STRAINER

Explains how to remove, clean, and reinstall the engine oil strainer.

OIL PUMP

Covers removal, inspection, and re-assembly procedures for the oil pump.

GEAR OIL

Instructions for inspecting gear oil level and performing gear oil replacement.

FUEL SYSTEM

MECHANISM ILLUSTRATION

Shows an exploded view of fuel system components like the carburetor and fuel tank.

PRECAUTIONS IN OPERATION

Safety precautions and specifications for the fuel system, emphasizing gasoline hazards.

TROUBLE DIAGNOSIS

Diagnostic guide for fuel system problems like poor starting, stalling, and rough idle.

CARBURETOR REMOVAL

Step-by-step process for removing the carburetor from the motorcycle.

VACUUM CHAMBER

Explains removal and disassembly of the carburetor's vacuum chamber.

AIR CUT-OFF VALVE

Describes removal and installation of the air cut-off valve and its components.

AUTO BY-STARTER

Covers inspection, removal, and installation of the auto by-starter system.

FLOAT CHAMBER

Details disassembly, checking, and cleaning of the carburetor's float chamber and jets.

INSTALLATION OF CARBURETOR

Guides reinstalling the carburetor and performing necessary adjustments.

IDLE SPEED ADJUSTMENT

Adjusts idle speed and emission values using an exhaust analyzer.

FUEL TANK

Instructions for removing and installing the fuel unit and the fuel tank.

AIR CLEANER

Details removal, inspection, and replacement of the air cleaner element.

REMOVAL OF ENGINE

MECHANISM DIAGRAM

Illustrates engine mounting points and related components with torque values.

OPERATIONAL PRECAUTIONS

Precautions, specifications for oil capacities, and torque values for engine mounting bolts.

ENGINE REMOVAL

Step-by-step guide for safely removing the engine from the motorcycle frame.

REMOVAL OF ENGINE SUSPENSION BUSHING

Details removing and pressing in engine suspension bushings using specialized tools.

ENGINE SUSPENSION FRAME

Describes removal and installation of engine suspension frame components.

INSTALLATION OF ENGINE

Guides reinstalling the engine onto the motorcycle frame, including safety notes.

CYLINDER HEAD AND VALVE

MECHANISM DIAGRAM

Exploded view of cylinder head, valve train, and associated torque values.

PRECAUTIONS IN OPERATION

Information and specifications for cylinder head, valve, and camshaft service, including measurement limits.

TROUBLE SHOOTING

Addresses top-end issues: rough idle, compression, noise, and white smoke.

CAMSHAFT REMOVAL

Procedure for removing the camshaft, including chain adjuster and timing marks.

CYLINDER HEAD REMOVAL

Steps for removing the cylinder head, including engine removal and shroud detachment.

CYLINDER HEAD DISASSEMBLY

Guides cylinder head disassembly, valve spring removal, and component cleaning.

CYLINDER HEAD INSPECTION

Inspects head flatness, valve spring length, stem diameter, and guide clearance.

VALVE SEAT INSPECTION AND SERVICE

Inspects valve seats, measures width, and performs grinding for proper sealing.

CYLINDER HEAD REASSEMBLY

Instructions for reassembling cylinder head, lubricating valves, and installing springs.

CYLINDER HEAD INSTALLATION

Details installing the cylinder head, gasket, and camshaft chain plate onto the engine.

CAMSHAFT INSTALLATION

Guides assembling camshaft holder, rocker arms, and timing the camshaft.

VALVE CLEARANCE ADJUSTMENT

Explains valve clearance adjustment with a feeler gauge and torque specs.

CYLINDER AND PISTON

MECHANISM DIAGRAM

Illustrates cylinder, piston, rings, and connecting rod assembly with torque values.

PRECAUTIONS IN OPERATION

Information and specifications for cylinder and piston service, including measurement limits.

TROUBLE DIAGNOSIS

Covers issues like low compression, knock, smoking exhaust, and engine overheat.

CYLINDER REMOVAL

Details removing the cylinder, including detaching the cylinder head and cam chain.

PISTON REMOVAL

Explains removing piston rings and the piston pin from the piston.

PISTON RING INSTALLATION

Guides cleaning piston top, grooves, and installing rings with correct gap placement.

PISTON INSTALLATION

Describes installing the piston and pin into the cylinder, ensuring correct orientation.

CYLINDER INSTALLATION

Covers cleaning surfaces, installing gasket, and mounting the cylinder head.

V-BELT DRIVING SYSTEM AND KICK STARTER ARM

MAINTENANCE DESCRIPTION

Overview of V-belt system maintenance, precautions, specs, torque, and troubleshooting.

TROUBLE DIAGNOSIS

Common V-belt system problems: no movement, shuddering, or poor acceleration.

LEFT CRANKCASE COVER

Details removal and installation of the left crankcase cover and kick starter arm.

KICK STARTER ARM

Explains disassembly, inspection, and reassembly of the kick starter arm.

DRIVING BELT

Covers removal, inspection, and replacement of the driving belt, including width limit.

SLIDING PULLEY

Details removal, inspection, and installation of the sliding pulley and weight rollers.

CLUTCH/DRIVEN PULLEY

Guides disassembly, inspection, and replacement of clutch lining, spring, and bearings.

FINAL DRIVING MECHANISM

OPERATIONAL PRECAUTIONS

Specifications for gear oil, lubricants, and torque values for the final drive mechanism.

TROUBLE DIAGNOSIS

Lists common issues: starting without movement, noise, and gear oil leaks.

DISASSEMBLY OF FINAL DRIVING MECHANISM

Steps for disassembling the final drive, including rear wheel and clutch removal.

INSPECTION OF FINAL DRIVING MECHANISM

Inspects countershaft, gears, and final driving shaft for wear or damage.

BEARING REPLACEMENT

Details replacing bearings in the gear box cover and driving shaft, emphasizing new bearings.

RE-ASSEMBLY OF FINAL DRIVING MECHANISM

Guides reassembling final drive, installing shafts, gears, cover, and adding gear oil.

A.C. GENERATOR AND STARTING CLUTCH

PRECAUTIONS IN OPERATION

Precautions for charging, ignition, and starting systems; emphasizes battery safety.

A.C. GENERATOR REMOVAL

Explains A.C. generator removal, including oil draining and fan shroud removal.

RIGHT CRANKCASE COVER REMOVAL

Details removing right crankcase cover, setting pin, and gasket.

RIGHT CRANKCASE COVER INSTALLATION

Guides installing right crankcase cover, oil seal, and related components.

MOUNTED COIL SET INSTALLATION

Covers installing coil set, pulse generator, and connecting wires.

FLY WHEEL INSTALLATION

Describes installing the flywheel, ensuring it's clean and tightened to torque.

CRANKCASE AND CRANKSHAFT

MECHANISM DIAGRAM

Illustrates crankcase and crankshaft assembly with component torque values.

OPERATIONAL PRECAUTIONS

Precautions and specifications for crankcase disassembly, clearances, and torque values.

TROUBLE DIAGNOSIS

Addresses engine noise from crankshaft bearings and piston pin wear.

DISASSEMBLY OF CRANKCASE

Details crankcase disassembly, bolt removal, and separating the cases.

CRANKSHAFT INSPECTION

Inspects crankshaft clearance, run-out, and bearing condition for wear.

ASSEMBLY OF CRANKCASE

Guides crankcase assembly, crankshaft installation, and gasket fitting with torque.

BODY COVER

MAINTENANCE INFORMATION

Provides a flowchart for body cover disassembly sequence and precautions.

HANDLE COVER

Details removal and installation of the handle cover and turn signal light connectors.

FRONT COVER

Explains removal and installation of the front cover, including headlight wire connector.

FRONT UNDER COVER

Guides removal and installation of front under cover, inner box B, and floor panel.

FRONT INNER BOX A

Details removal and installation of front inner box A, including screws and switch cover.

BODY COVER/REAR CENTER COVER/REAR FENDER

Covers removal and installation of rear body panels, carrier, and fender.

FRONT CENTER COVER

Explains removal and installation of the front center cover and its mounting bolts.

LUGGAGE BOX

Instructions for removing and installing the luggage box and double seat.

FLOOR PANEL

Details removal and installation of the floor panel, including screws and bolts.

BRAKE SYSTEM

MECHANISM DIAGRAM - FRONT DISC BRAKE SYSTEM

Illustrates front disc brake components with torque values.

MECHANISM DIAGRAM - FRONT DRUM BRAKE SYSTEM

Shows front drum brake system components and torque values.

MECHANISM DIAGRAM - REAR DRUM BRAKE SYSTEM

Depicts rear drum brake system components and torque values.

MAINTENANCE INFORMATION

Precautions, brake thickness specs, and torque values for brake system components.

TROUBLE DIAGNOSIS

Lists common brake issues: soft, hard, uneven brakes, and noise for disc/drum.

HYDRAULIC BRAKE SYSTEM INSPECTION

Inspects for fluid leaks, hose connections, and checks brake fluid level.

BRAKE FLUID REPLACEMENT/AIR-BLEED

Details brake fluid replacement and bleeding the hydraulic system.

BRAKE CALIPER

Explains caliper removal, lining replacement, and installation with torque values.

BRAKE DISC

Inspects brake disc for wear, thickness, deformation, and bend with limits.

BRAKE MASTER CYLINDER

Details removal, inspection, and assembly of the master cylinder and related parts.

DRUM BRAKE-DRUM

Describes brake drum removal and inspection, including hub ID measurement.

BRAKE LINING

Explains measuring brake lining thickness and replacing worn or contaminated lining.

BRAKE PANEL

Covers removal and installation of brake shoes, cam, anchor pin on the brake panel.

STEERING, FRONT WHEEL, AND FRONT SHOCK ABSORBER

MECHANISM DIAGRAM

Illustrates steering, front wheel, and shock absorber assembly with torque values.

PRECAUTIONS IN OPERATION

General info, torque values, tools, and troubleshooting for steering and suspension.

TROUBLE DIAGNOSIS

Lists common problems: hard steering, wheel wobbling, and suspension issues.

STEERING HANDLE

Details removal and installation of the steering handle, including brake connections.

FRONT WHEEL

Guides front wheel removal/installation, axle torque, and speedometer cable.

FRONT SHOCK ABSORBER

Explains front shock absorber removal/installation, alignment, and torque values.

FRONT FORK/STEERING COLUMN

Describes removal and installation of steering column, bearings, and lubrication.

REAR WHEEL AND REAR SHOCK ABSORBER

MECHANISM DIAGRAM

Illustrates rear wheel, exhaust muffler, and shock absorber assembly with torque values.

PRECAUTIONS IN OPERATION

General info, wheel wobbling, brake lining specs, and rear component torque values.

TROUBLE DIAGNOSIS

Lists issues: rear wheel wobbling, soft shock absorbers, braking noise, poor performance.

EXHAUST MUFFLER

Details removal and installation of the exhaust muffler, including connection hardware.

REAR WHEEL

Covers inspection of wheel rim wobbling and rear wheel removal/installation.

REAR SHOCK ABSORBER

Explains rear shock absorber removal/installation, including torque values for mounting bolts.

ELECTRICAL EQUIPMENT

MECHANISM DIAGRAM

Illustrates electrical system components: starting, ignition, lighting, fuel unit.

PRECAUTIONS IN OPERATION

Precautions for charging, ignition, starting systems; battery safety emphasized.

SPECIFICATION

Lists specifications for battery, alternator, ignition components, and starter motor.

TROUBLE DIAGNOSIS

Troubleshooting guides for charging, ignition, and starting system failures.

CHARGING SYSTEM

Details current leakage inspection, charging procedures, and voltage/current checks.

IGNITION SYSTEM

Covers ignition circuit, CDI checks, coil testing, and pulse generator resistance.

STARTING SYSTEM

Explains starter switch inspection, motor removal/installation, and troubleshooting.

METER

Describes removal and installation of the meter assembly, including speedometer cable.

LIGHTS/BULBS

Guides replacing headlight bulbs, adjusting beam, and replacing signal/tail/brake lights.

MAIN SWITCH/HORN

Covers checking and replacing main switch, continuity tests, and connector checks.

FUEL UNIT

Details fuel unit removal/installation and resistance checks for float arm positions.

ELECTRICAL DIAGRAM

SPECIAL TOOL

Related product manuals