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Sym Fiddle III 50 Service Manual

Sym Fiddle III 50
187 pages
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SYM
1. GENERAL INFORMATION/TROUBLE DIAGNOSIS
1-1
SYMBOLS AND MARKS ....................1-1
GENERAL SAFETY ...........................1-2
SERVICE PRECAUTIONS .................1-3
SPECIFICATIONS..............................1-9
TORQUE VALUES (ENGINE).............. 1-10
TORQUE VALUES (FRAME) ............... 1-11
TROUBLES DIAGNOSIS ..................... 1-12
LUBRICATION POINTS ....................... 1-16
SYMBOLS AND MARKS
Symbols and marks are used in this manual to indicate what and where the special service are
needed, in case supplemental information is procedures needed for these symbols and marks,
explanations will be added to the text instead of using the symbols or marks.
Warning
Means that serious injury or even death may result if procedures are not
followed.
Caution
Means that equipment damages may result if procedures are not followed.
Engine oil
Limits to use SAE 10W-30 API SH/CD class oil. Warranty will not cover the
damage that caused by not apply with the limited engine oil.
Gear oil
Limits to use SAE 85W-140 class oil. Warranty will not cover the damage
that caused by not apply with the limited gear oil.
Grease
King Mate G-3 is recommended.
Locking sealant
Apply sealant, medium strength sealant should be used unless otherwise
specified.
Oil seal
Apply with lubricant.
Renew
Replace with a new part before installation.
Brake fluid
Use recommended brake fluid DOT3 or WELLRUN brake fluid.
Special tools
Special service tools.
Correct
Meaning correct installation.
Wrong
Meaning wrong installation.
Indication
Indication of components.
Directions
Indicates position and operation directions.
Components assembly directions each other.
Indicates where the bolt installation direction, --- means that bolt cross
through the component (invisibility).

Table of Contents

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Sym Fiddle III 50 Specifications

General IconGeneral
BrandSym
ModelFiddle III 50
CategoryScooter
LanguageEnglish

Summary

1. GENERAL INFORMATION/TROUBLE DIAGNOSIS

SYMBOLS AND MARKS

Explains various symbols used in the manual for service procedures.

GENERAL SAFETY

Provides essential safety precautions for operating and servicing the vehicle.

SERVICE PRECAUTIONS

Details important precautions for servicing to prevent damage and ensure correct procedures.

SPECIFICATIONS

Lists key technical specifications of the vehicle for reference.

TORQUE VALUES (ENGINE)

Specifies torque values for engine components to ensure proper assembly.

TORQUE VALUES (FRAME)

Specifies torque values for frame components for correct assembly.

TROUBLES DIAGNOSIS

Provides diagnostic flowcharts for common engine starting and running issues.

10. A.C. GENERATOR

PRECAUTIONS IN OPERATION

Lists safety and operational precautions specific to the A.C. generator.

A.C. GENERATOR REMOVAL

Step-by-step guide for removing the A.C. generator assembly.

RIGHT CRANKCASE COVER REMOVAL

Procedures for removing the right crankcase cover.

AC Generator Installation Procedures

Details for installing the right crankcase cover, coil set, and flywheel.

11. CRANKCASE/CRANKSHAFT

MECHANISM DIAGRAM

Exploded view illustrating the crankcase and crankshaft components.

OPERATIONAL PRECAUTIONS

General operational precautions for servicing the crankcase and crankshaft.

TROUBLE DIAGNOSIS

Lists common troubleshooting issues related to engine noise.

DISASSEMBLY OF CRANKCASE

Step-by-step instructions for disassembling the crankcase.

Crankcase Disassembly Details

Continues crankcase disassembly with removing crankshaft, gasket, and oil seal.

CRANKSHAFT INSPECTION

Procedures for inspecting the crankshaft for wear and run-out.

ASSEMBLY OF CRANKCASE

Step-by-step instructions for assembling the crankcase.

12. BODY COVER

MAINTENANCE INFORMATION

Overview of body cover maintenance and disassembly sequence.

Body Cover Disassembly Sequence

Outlines the order for disassembling various body covers.

HANDLE COVER Removal and Installation

Detailed steps for removing and installing the handle cover.

FRONT COVER Removal

Steps for removing the front cover.

FRONT INNER BOX Removal and Installation

Procedures for removing and installing the front inner box.

BODY COVER/REAR CENTER COVER/REAR FENDER Removal

Steps for removing body covers, rear center cover, and rear fender.

REAR FENDER and BODY COVER Installation

Instructions for installing the rear fender and body cover.

FRONT CENTER COVER and LUGGAGE BOX Removal/Installation

Procedures for removing/installing front center cover and luggage box.

FLOOR PANEL Removal

Steps for removing the floor panel.

SIDE COVER and UNDER COVER Removal/Installation

Instructions for removing and installing side and under covers.

13. BRAKE SYSTEM

MECHANISM DIAGRAM - FRONT DISC BRAKE SYSTEM

Exploded view of the front disc brake system components.

MECHANISM DIAGRAM - REAR DRUM BRAKE SYSTEM

Exploded view of the rear drum brake system components.

MAINTENANCE INFORMATION

Precautions, specifications, and torque values for brake system maintenance.

TROUBLE DIAGNOSIS (Disc Brake)

Lists common troubleshooting issues for disc brakes.

HYDRAULIC BRAKE SYSTEM INSPECTION

Steps for inspecting the hydraulic brake system and fluid level.

BRAKE FLUID REPLACEMENT/AIR-BLEED

Procedures for replacing brake fluid and bleeding the system.

BRAKE CALIPER Removal and Installation

Instructions for removing and installing the brake caliper and lining.

BRAKE DISC Inspection and Removal

Procedures for inspecting and removing the brake disc.

BRAKE MASTER CYLINDER Removal

Steps for removing the brake master cylinder.

BRAKE MASTER CYLINDER Inspection and Assembly

Inspecting and assembling the brake master cylinder.

BRAKE MASTER CYLINDER INSTALLATION

Steps for installing the brake master cylinder onto the handlebar.

DRUM BRAKE-DRUM (Brake Drum and Brake Lining)

Procedures for inspecting brake drum and lining wear.

BRAKE PANEL Removal and Installation

Steps for removing and installing the front and rear brake panels.

14. STEERING/FRONT WHEEL/FRONT SHOCK ABSORBER

MECHANISM DIAGRAM

Exploded view of steering, front wheel, and shock absorber components.

PRECAUTIONS IN OPERATION

Safety and operational precautions for steering, front wheel, and shock absorber.

TROUBLE DIAGNOSIS (Steering, Wheel, Suspension)

Lists common troubleshooting issues for steering, front wheel, and suspension.

STEERING HANDLE REMOVAL

Step-by-step guide for removing the steering handle.

FRONT WHEEL Removal

Procedures for removing the front wheel.

FRONT WHEEL Inspection

Inspecting wheel axle run-out and wheel rim wobble.

WHEEL BEARINGS Inspection and Installation

Inspecting and installing wheel bearings.

Wheel Hub and Brake Disc Installation

Installing wheel hub components and the brake disc.

Front Wheel Axle Installation

Steps for installing the front wheel axle.

FRONT SHOCK ABSORBER Removal and Installation

Procedures for removing and installing front shock absorbers.

STEERING COLUMN Removal and Installation

Detailed steps for removing and installing the steering column.

15. REAR WHEEL/REAR SHOCK ABSORBER

MECHANISM DIAGRAM

Exploded view of rear wheel and shock absorber components.

PRECAUTIONS IN OPERATION

Safety and operational precautions for rear wheel and suspension.

TROUBLE DIAGNOSIS (Rear Wheel, Suspension)

Lists common troubleshooting issues for rear wheel and shock absorber.

EXHAUST MUFFLER Removal and Installation

Steps for removing and installing the exhaust muffler.

REAR SHOCK ABSORBER Removal and Installation

Procedures for removing and installing the rear shock absorber.

16. ELECTRICAL EQUIPMENT

MECHANISM DIAGRAM

Illustrates the location of various electrical components.

PRECAUTIONS IN OPERATION (Electrical Systems)

Safety and operational precautions for electrical systems.

Specifications (Electrical)

Lists specifications for battery, alternator, spark plug, etc.

TROUBLE DIAGNOSIS (Electrical Systems)

Troubleshooting common electrical system problems.

CHARGING SYSTEM

Details on the charging wire diagram and current leakage inspection.

BATTERY Removal and Installation

Procedures for removing and installing the battery.

BATTERY Voltage Check and CHARGING

How to check battery voltage and perform charging.

Charging Voltage/Current Inspection

Procedures for inspecting charging voltage and current.

VOLTAGE REGULATOR INSPECTION

Steps for inspecting the voltage regulator.

Alternator Coils Check

How to check alternator charging and lighting coils.

IGNITION SYSTEM - CDI UNIT Check

Procedures for checking the CDI unit.

Ignition coil Removal and Spark Plug Confirmation

Removing ignition coil and confirming spark plug function.

Ignition System - Secondary Coil and Pulse Generator Check

Checking secondary coil and pulse generator resistance.

STARTING SYSTEM - Starter magnetic switch inspection

How to inspect the starter magnetic switch for operation.

Starting Motor Removal and Installation

Procedures for removing and installing the starting motor.

METER Removal and Installation

Steps for removing and installing the meter assembly.

Headlight Bulb Replacement and Adjustment

Procedures for replacing headlight bulb and adjusting beam.

Turn Signal and Tail/Brake Light Bulb Replacement

Replacing front turn signal, tail, brake, and rear turn signal bulbs.

MAIN SWITCH Check and Replacement

Procedures for checking and replacing the main switch.

Side Stand and Starting Switches

Information on side stand and starting switches.

Other Switches (Turn Signal, Brake Light, Horn, Engine Stop)

Details on turn signal, brake light, horn, and engine stop switches.

FUEL UNIT Removal, Inspection and Installation

Procedures for removing, inspecting, and installing the fuel unit.

2. MAINTENANCE INFORMATION

PRECAUTIONS IN OPERATION

General safety and operational precautions for maintenance tasks.

PERIODICAL MAINTENANCE SCHEDULE

Schedule for routine maintenance tasks at different intervals.

LUBRICATION SYSTEM - Engine Oil

Detailed steps for checking and changing engine oil.

Gear Oil and Fuel System

Procedures for checking gear oil and fuel system components.

AIR CLEANER and THROTTLE VALVE OPERATION

Maintenance for air cleaner and throttle valve operation checks.

VALVE CLEARANCE ADJUSTMENT

Procedures for checking and adjusting valve clearance.

CARBURETOR IDLE SPEED ADJUSTMENT

Steps for adjusting carburetor idle speed and emission.

IGNITION SYSTEM and SPARK PLUG

Information on ignition timing and spark plug maintenance.

Cylinder Compression and Driving System

Checking compression pressure and driving belt condition.

Steering and Suspension Systems

Precautions and checks for steering and suspension systems.

FRONT DISC BRAKE SYSTEM

Maintenance of front disc brake system including hoses, fluid, and bleeding.

BRAKE FLUID and BRAKE LINING

Adding brake fluid and checking brake lining wear.

Drum Brake System (Free Play Adjustment)

Adjusting free play for front and rear drum brakes.

WHEEL/TIRE Inspection

Checking tire pressure, surface, and tread depth.

BATTERY and HEADLIGHT ADJUSTMENT

Procedures for battery removal and headlight adjustment.

3. LUBRICATION SYSTEM

MECHANISM DIAGRAM

Illustrates the lubrication system components and oil flow.

OPERATIONAL PRECAUTIONS and Specifications

Precautions and specifications for engine oil and gear oil.

ENGINE OIL (Checking and Changing)

Detailed steps for checking and changing engine oil.

OIL PUMP Removal and Inspection

Procedures for removing and inspecting the oil pump.

OIL PUMP Re-assembly and Installation

Steps for re-assembling and installing the oil pump.

GEAR OIL (Level Inspection and Replacement)

Procedures for checking and replacing gear oil.

4. FUEL SYSTEM

MECHANISM ILLUSTRATION

Illustrates the fuel system components.

PRECAUTIONS IN OPERATION and Specifications

Safety precautions and specifications for the fuel system.

TROUBLE DIAGNOSIS (Fuel System)

Lists common troubleshooting issues for the fuel system.

CARBURETOR REMOVAL

Step-by-step guide for removing the carburetor.

CARBURETOR Disassembly and Installation

Procedures for disassembling and installing carburetor components.

ACCELERATE PUMP Removal and Installation

Steps for removing and installing the accelerate pump.

AUTO BY-STARTER Removal, Inspection and Installation

Procedures for removing, inspecting, and installing the auto by-starter.

FLOAT CHAMBER Disassembly and Checking

Steps for disassembling and checking the float chamber.

CARBURETOR Installation and IDLE SPEED ADJUSTMENT

Installing carburetor and adjusting idle speed.

FUEL TANK Removal and Installation

Procedures for removing and installing the fuel tank.

AIR CLEANER Removal and Element Cleaning

Steps for removing the air cleaner and cleaning the element.

4. ELECTRONICALLY CONTROLLED CARBURETOR SYSTEM

MECHANISM ILLUSTRATION

Diagram showing components of the electronically controlled carburetor system.

ECS Vehicle Configuration

Illustration of the ECS system layout on the vehicle.

ECS Operating Instructions

Explains the operating principles and data flow of the ECS.

ECS Introduction and Working Principle

Introduction to ECS and its working principle.

Ignition System Working Principle and Specifications

Explains ignition system principle and lists specifications.

Crankshaft Position/Rotate Speed Sensor

Illustration and testing procedures for the crankshaft sensor.

Throttle Position Sensor Illustration and Basic Principle

Illustration and basic principle of the throttle position sensor.

Throttle Position Sensor Testing Procedures and Abnormal Phenomena

Testing procedures and how to handle abnormal phenomena.

Engine Temperature Sensor Illustration and Testing

Illustration and testing of the engine temperature sensor.

O2 SENSOR Illustration and Testing Procedures

Illustration and testing procedures for the O2 sensor.

ECU Connector Illustration and Function Description

Details of ECU connector pins and their functions.

ECU Fault Code Identification and Diagnostic Instrument Usage

Table for fault codes and how to use diagnostic tools.

ECU Sensor Fault Diagnosis (TPS, Air Valve, O2 Sensor)

Diagnosing faults for TPS, air valve, and O2 sensor.

5. REMOVAL OF ENGINE

MECHANISM DIAGRAM

Exploded view of engine removal components.

OPERATIONAL PRECAUTIONS and Specifications

Precautions and specifications for engine removal.

ENGINE REMOVAL - Electrical Connections

Steps for disconnecting electrical connectors during engine removal.

ENGINE REMOVAL - Fuel, Vacuum, Exhaust, and Air Cleaner Connections

Disconnecting fuel, vacuum, exhaust, and air cleaner systems.

ENGINE REMOVAL - Brake, Suspension, and Engine Mounts

Disconnecting brake, suspension, and engine mounts.

REMOVAL OF ENGINE SUSPENSION BUSHING

Procedures for removing and replacing suspension bushings.

ENGINE SUSPENSION FRAME Removal and Installation

Steps for removing and installing the engine suspension frame.

INSTALLATION OF ENGINE

Procedures for installing the engine, including torque values.

6. CYLINDER HEAD/VALVE

MECHANISM DIAGRAM

Exploded view of cylinder head and valve components.

PRECAUTIONS IN OPERATION and Specifications

Precautions and specifications for cylinder head and valve service.

TROUBLE SHOOTING (Engine Top End)

Troubleshooting common issues affecting engine top end performance.

CYLINDER HEAD REMOVAL

Step-by-step guide for removing the cylinder head.

Cylinder Head Removal - Camshaft and Timing

Procedures related to camshaft and timing during head removal.

Cylinder Head Removal and Disassembly

Final steps of head removal and initial disassembly of components.

Valve Components and Camshaft Inspection

Disassembling valve components and inspecting camshaft condition.

Valve Rocker Arm/Shaft and Cylinder Head Inspection

Inspecting valve rocker arm, shaft, and cylinder head flatness.

Valve Stem and Valve Guide Inspection/Replacement

Procedures for inspecting and replacing valve stems and guides.

Valve Guide and Valve Seat Inspection/Service

Inspecting and servicing valve guides and seats.

Valve Seat Inspection and Grinding

Inspecting and grinding valve seats for proper contact.

CYLINDER HEAD REASSEMBLY

Reassembling cylinder head components like valves and springs.

CYLINDER HEAD INSTALLATION

Steps for installing the cylinder head, including torque values.

Camshaft Installation and Valve Clearance Adjustment

Installing camshaft and adjusting valve clearance.

7. CYLINDER/PISTON

MECHANISM DIAGRAM

Exploded view of cylinder and piston components.

PRECAUTIONS IN OPERATION and Specifications

Precautions and specifications for cylinder and piston service.

TROUBLE DIAGNOSIS (Cylinder/Piston)

Lists common troubleshooting issues related to cylinder and piston.

CYLINDER REMOVAL

Step-by-step guide for removing the cylinder.

Cylinder Inspection

Procedures for inspecting cylinder diameter, roundness, and flatness.

PISTON REMOVAL and Piston Ring Measurement

Removing piston and measuring piston ring gaps.

Piston Pin and Piston Measurement

Measuring piston pin and piston dimensions.

PISTON RING INSTALLATION

Instructions for cleaning and installing piston rings.

PISTON INSTALLATION and CYLINDER INSTALLATION

Procedures for installing the piston and cylinder assembly.

8. V-BELT DRIVING SYSTEM/KICK STARTER ARM/STARTER CLUTCH

MECHANISM DIAGRAM

Exploded view of the V-belt, kick starter, and clutch system.

MAINTENANCE DESCRIPTION and TROUBLE DIAGNOSIS

Maintenance precautions, specifications, and troubleshooting for the V-belt system.

LEFT CRANKCASE COVER and KICK STARTER ARM Disassembly

Procedures for disassembling the left crankcase cover and kick starter arm.

Kick Starter Arm Reassembly and Left Crankcase Cover Installation

Reassembling kick starter arm and installing left crankcase cover.

DRIVING BELT Removal and Inspection

Steps for removing and inspecting the driving belt.

Driving Belt Installation and Clutch Installation

Installing the driving belt and clutch assembly.

SLIDING PULLEY REMOVAL

Procedures for removing the sliding pulley and its components.

SLIDING PULLEY Inspection and Assembly/Installation

Inspecting and assembling the sliding pulley.

Pulley Installation and Driving Pulley Installation

Installing pulleys and the driving belt.

CLUTCH/DRIVEN PULLEY Disassembly and Clutch Outer Inspection

Disassembling clutch/driven pulley and inspecting clutch outer.

Clutch Pad, Driven Pulley Spring, and Driven Pulley Inspection

Inspecting clutch pad, driven pulley spring, and driven pulley.

Clutch Block Replacement

Procedures for replacing the clutch block.

Clutch/Driven Pulley Bearing Replacement

Steps for replacing bearings in the clutch/driven pulley.

Installation of clutch/driven pulley

Installing the clutch/driven pulley assembly.

9. FINAL DRIVING MECHANISM

MECHANISM DIAGRAM

Exploded view of the final driving mechanism components.

OPERATIONAL PRECAUTIONS and TROUBLE DIAGNOSIS

Precautions and troubleshooting for the final driving mechanism.

DISASSEMBLY OF FINAL DRIVING MECHANISM

Step-by-step guide for disassembling the final drive mechanism.

INSPECTION OF FINAL DRIVING MECHANISM and BEARING REPLACEMENT

Inspecting final drive components and replacing bearings.

Driving Shaft and Final Driving Shaft Bearing Replacement

Procedures for replacing driving shaft and final drive shaft bearings.

RE-ASSEMBLY OF FINAL DRIVING MECHANISM

Steps for re-assembling the final drive mechanism.

FORWARD

Service Department Information

Identifies the issuing department and company.

HOW TO USE THIS MANUAL

Manual Structure Overview

Brief overview of the manual's chapter structure and usage.

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