Sym Fiddle 50 - User Manual

Questions and Answers

N
Nicholas BakerAug 1, 2025
Why is my Sym Scooter engine hard to start?
- S
  Stephanie HendersonAug 1, 2025
  If your Sym Scooter engine is hard to start or won't start, there are several potential causes. First, check to ensure there is fuel in the fuel tank and inspect the pipes from the fuel tank to the carburetor, as well as the intake vacuum, for any clogs. Another possible cause is a malfunction of the fuel pump, which can be addressed by checking for looseness or damage to the fuel pump vacuum. Also, remove the spark plug again and check it. If these steps don't resolve the issue, try restarting the engine by following the standard starting procedures.
T
Terrance AdamsAug 9, 2025
Why does my Sym Scooter engine run sluggish and lack power?
- C
  Carla MartinAug 9, 2025
  If your Sym Scooter engine runs sluggish and lacks power, several factors could be responsible. A clogged air cleaner might be the cause, so try gradual acceleration and check the engine speed. Incorrect ignition timing can also lead to this issue, so check the ignition timing using an ignition lamp. Additionally, no compression pressure may be the reason, so check the cylinder compression pressure using a compression pressure gauge. Also, a clogged carburetor or engine overheat could be the cause, so inspect these components.
C
chrisconleyAug 15, 2025
What to do if Sym Fiddle 50 engine runs sluggish at high speed?
- J
  justinevansAug 15, 2025
  If your Sym Scooter engine runs sluggish at high speed, check the ignition timing. Also, verify that there is sufficient fuel in the fuel tank and inspect the fuel supplying system in the automatic fuel cup. Finally, check if the carburetor is clogged.
J
Jeffrey MartinAug 23, 2025
How to fix a Sym Fiddle 50 Scooter engine that runs sluggish at low speed and idling?
- S
  Stephanie GregoryAug 23, 2025
  If your Sym Scooter engine runs sluggish, especially at low speed and while idling, it could be due to several reasons. Incorrect ignition timing, potentially caused by a malfunction of the CDI or AC generator, is one possibility, so check the ignition timing using an ignition lamp. Another cause might be a rich or lean mixture, which can be adjusted by using the air screw of the carburetor. Remove the spark plug, install spark plug into spark plug cap and perform spark test against engine ground.

Sym Fiddle 50 Specifications

General

Displacement	49.5 cc
Cooling System	Air-cooled
Fuel System	Carburetor
Front Suspension	Telescopic Fork
Front Brake	Disc
Rear Brake	Drum
Fuel Capacity	6.5 liters
Dry Weight	95 kg
Engine Type	4-Stroke
Transmission	CVT

Summary

Forward

How to Use This Manual

Model Illustration

1. General Information

Symbols and Marks

Explains warning symbols and service marks used in the manual.

General Safety

Details safety precautions for operating and maintaining the scooter.

Service Precautions

Outlines essential procedures and advice for service work.

Specifications

Lists technical specifications for the Fiddle 50 scooter.

Torque Values

Provides standard torque specifications for various engine and frame bolts.

Cables and Harness Routing

Guides on proper routing of electrical wires and cables for safety.

Troubleshooting

Offers solutions for common engine starting and running issues.

2. Service Maintenance Information

Periodical Maintenance Schedule

Outlines recommended maintenance intervals and checks.

Air Cleaner

Instructions for cleaning and replacing the air cleaner element.

Fuel Filter

Procedure for replacing the fuel filter.

Tire

Guidelines for checking and maintaining tire pressure and condition.

Battery

Steps for battery removal, installation, and voltage check.

Steering System

Procedures for inspecting and adjusting the steering system.

Suspension

Guidance on checking front and rear suspension components.

Spark Plug

Steps for inspecting, measuring gap, and replacing the spark plug.

Ignition Timing

Explains how to check and verify ignition timing.

Headlight Adjustment

Details on how to adjust the scooter's headlight beam.

3. Lubrication System

Lubrication System Diagram

Visual representation of the lubrication system components.

Precautions in Operation

Important safety and handling instructions for lubrication.

Lubricant

Specifies the recommended oil type and capacity for the lubrication system.

Trouble Shooting

Lists common problems and their probable causes related to lubrication.

Oil Pump Removal

Step-by-step instructions for removing the oil pump.

Oil Pump Installation

Procedure for installing the oil pump correctly.

Oil Pump;Oil Tube Air Bleeding

Guide on bleeding air from the oil pump and tubes.

Oil Tank

Instructions for the removal and installation of the oil tank.

4. Engine Removal

Maintenance Information

Details parts requiring engine removal and related bolt torque values.

Engine Removal

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

Engine Installation

Procedures and torque values for reinstalling the engine.

5. Cylinder Head;Cylinder;Piston

Maintenance Information

Precautions, specifications, and torque values for cylinder components.

Troubleshooting

Diagnoses and solutions for compression issues and noises.

Cylinder Head

Procedures for removing, cleaning, and installing the cylinder head.

Cylinder;Piston

Steps for removing, inspecting, and installing cylinder and piston components.

Piston Ring Inspection

How to measure piston ring end gap and check mating condition.

Connecting Rod Inspection

Inspecting the connecting rod small end and clearance.

6. Alternator

Maintenance Information

Precautions, torque values, tools, and coil resistance for the alternator.

Alternator Removal

Step-by-step guide for removing the alternator assembly.

Alternator Installation

Procedures for installing the alternator assembly and checking timing.

7. “V” Type Belt Drive System;Kick-Starter

Maintenance Information

Precautions, specifications, and torque values for the drive system.

Trouble Shooting

Diagnoses issues like inability to move or poor performance.

Left Crankcase Cover

Procedures for removing and inspecting the left crankcase cover.

Drive Belt

Steps for removing, inspecting, and installing the drive belt.

Movable Drive Face

Instructions for removing, inspecting, and installing the movable drive face.

Clutch;Driven Pulley

Procedures for disassembly, inspection, and installation of clutch/pulley.

Clutch Block Replacement

Steps for replacing clutch weights and springs.

8. Final Driving Mechanism

Maintenance Information

Lists gear oil usage, recommended oil, and special tools.

Troubleshooting

Diagnoses problems like inability to move, noise, and oil leaks.

Disassembly of Final Driving Mechanism

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

Inspection of Final Driving Mechanism

How to check for wear or damage in final drive components.

Bearing Replacement

Guidance on replacing bearings using special tools.

Re-Assembly of Final Driving Mechanism

Procedures for reassembling the final drive with special tools.

9. Crankcase;Crankshaft

Maintenance Information

Details components to remove before crankcase disassembly.

Troubleshooting

Diagnoses engine noise issues related to bearings and connecting rods.

Crankcase Disassembly

Steps for disassembling the crankcase.

Crankshaft Removal

Procedures for removing the crankshaft and its oil seals.

Crankshaft Inspection

How to measure clearances and run-out of the crankshaft.

Crankcase Installation

Steps for cleaning and installing bearings and crankshaft.

10. Fuel System

Maintenance Information

Precautions, specifications, and troubleshooting for the fuel system.

Troubleshooting

Diagnoses fuel system issues like engine start failure and stalling.

Throttle Valve

Procedures for removing, inspecting, and installing the throttle valve.

Carburetor Removal

Steps for removing the carburetor.

Auto By-Starter

Inspection and testing of the auto by-starter.

Float;Float Valve;Jet

Instructions for removing and installing float, valve, and jets.

Float Level Inspection

How to measure and adjust the float fuel level.

Carburetor Installation

Steps for installing the carburetor and related adjustments.

Reed Valve

Procedures for removing, inspecting, and installing the reed valve.

Fuel Pump

Inspection and replacement of the fuel pump.

Air Cleaner

Instructions for removing and installing the air cleaner.

11. Brake System

Front Drum Brake System

Overview of the front drum brake components.

Rear Drum Brake System

Overview of the rear drum brake components.

Maintenance Information

Precautions, specifications, and torque values for brake system.

Troubleshooting

Diagnoses common brake issues for disc and drum brakes.

Drum Brake

Procedures for inspecting and removing drum brake components.

12. Body Cover

Body Overview

Exploded view of all body cover parts.

Maintenance Information

General precautions for body cover disassembly and assembly.

Side Covers

Instructions for removing and installing side covers.

Luggage Box

Steps for removing and installing the luggage box.

Body Cover

Procedures for removing and installing main body covers.

Front Cover

Instructions for removing and installing the front cover.

Floor Panel

Procedures for removing and installing the floor panel.

Front Fender

Instructions for removing and installing the front fender.

Front Inner Box

Steps for removing and installing the front inner box.

Under Cover

Procedures for removing and installing the under cover.

Rear Fender

Instructions for removing and installing the rear fender.

13. Steering;Front Wheel;Suspension

Maintenance Information

Specifications, torque values, and special tools for steering and suspension.

Troubleshooting

Diagnoses issues with steering, wheel wobble, and cushion performance.

Steering Handle

Procedures for removing and installing the steering handle.

Front Wheel

Steps for removing, inspecting, and installing the front wheel.

Front Cushion

Instructions for removing and installing the front suspension cushion.

Front Fork

Procedures for removing and installing the front fork and bearings.

14. Rear Wheel;Suspension

Maintenance Information

Specifications and torque values for rear wheel and suspension.

Troubleshooting

Diagnoses rear wheel wobbling, soft cushion, and brake issues.

Rear Wheel

Steps for removing, inspecting, and replacing the rear wheel hub.

Rear Cushion

Instructions for removing and installing the rear suspension cushion.

15. Electrical Equipment

Maintenance Information

Precautions, charging system, and ignition system specifications.

Troubleshooting

Diagnoses electrical issues like no voltage, no spark, and starter problems.

Battery

Procedures for battery removal, installation, voltage check, and charging.

Charging System

Inspection of current leakage and charging voltage.

Ignition System

Details the ignition system diagram and coil inspection.

Starting System

Inspection and replacement of starter relay and pinion.

Oil Level Switch

Troubleshooting and installation of the oil level switch.

Fuel Unit

Removal, installation, and inspection of the fuel unit.

Switch; Horn

Continuity checks for main, handle, and horn switches.

Bulb Replacement

Steps for replacing headlight, winker, tail, and brake light bulbs.

16. Electrical Diagram

Electrical Diagram

Wiring diagram showing the electrical system of the scooter.

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Sym Fiddle 50 - User Manual

Table of Contents

Questions and Answers

Sym Fiddle 50 Specifications

Summary

Forward

How to Use This Manual

Model Illustration

1. General Information

Symbols and Marks

General Safety

Service Precautions

Specifications

Torque Values

Cables and Harness Routing

Troubleshooting

2. Service Maintenance Information

Periodical Maintenance Schedule

Air Cleaner

Fuel Filter

Tire

Battery

Steering System

Suspension

Spark Plug

Ignition Timing

Headlight Adjustment

3. Lubrication System

Lubrication System Diagram

Precautions in Operation

Lubricant

Trouble Shooting

Oil Pump Removal

Oil Pump Installation

Oil Pump;Oil Tube Air Bleeding

Oil Tank

4. Engine Removal

Maintenance Information

Engine Removal

Engine Installation

5. Cylinder Head;Cylinder;Piston

Maintenance Information

Troubleshooting

Cylinder Head

Cylinder;Piston

Piston Ring Inspection

Connecting Rod Inspection

6. Alternator

Maintenance Information

Alternator Removal

Alternator Installation

7. “V” Type Belt Drive System;Kick-Starter

Maintenance Information

Trouble Shooting

Left Crankcase Cover

Drive Belt

Movable Drive Face

Clutch;Driven Pulley

Clutch Block Replacement

8. Final Driving Mechanism

Maintenance Information

Troubleshooting

Disassembly of Final Driving Mechanism

Inspection of Final Driving Mechanism

Bearing Replacement

Re-Assembly of Final Driving Mechanism

9. Crankcase;Crankshaft

Maintenance Information

Troubleshooting

Crankcase Disassembly

Crankshaft Removal

Crankshaft Inspection

Crankcase Installation

10. Fuel System

Maintenance Information

Troubleshooting

Throttle Valve

Carburetor Removal

Auto By-Starter

Float;Float Valve;Jet