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Introduction to the service manual and its purpose.
Instructions on how to navigate and use the manual's features.
Visual identification of scooter parts and their locations.
Explanation of symbols and marks used in the manual.
Essential safety guidelines for operating and servicing the scooter.
Key technical specifications for the DD 50 scooter.
Standard torque values for various bolts and nuts.
Diagnostic guide for common engine starting and performance problems.
Illustration showing all lubrication points on the scooter.
Basic specs and maintenance overview for the DD 50.
Recommended maintenance intervals and tasks for the scooter.
Procedures for servicing fuel lines, filter, engine oil, and oil pump.
Steps for checking and adjusting brake free play and wear.
Procedures for checking and adjusting ignition timing and throttle.
Steps for adjusting the scooter's headlight beam.
Diagram illustrating the lubrication system components.
Important precautions and recommended lubricant for the system.
Steps for removing, installing, and bleeding the oil pump.
Procedures for removing and installing the oil tank.
Step-by-step guide for removing the engine from the scooter.
Step-by-step guide for installing the engine back into the scooter.
Procedures for removing, inspecting, and installing the cylinder head.
Procedures for removing, inspecting, and installing the cylinder and piston.
Common problems and solutions related to cylinder and piston.
Information on alternator maintenance and coil resistance values.
Step-by-step guide for removing the alternator assembly.
Step-by-step guide for installing the alternator assembly.
Procedures for removing, inspecting, and installing the drive belt.
Procedures for disassembling and assembling the kick starter.
Procedures for servicing the clutch and driven pulley components.
Information on gear oil, special tools, and troubleshooting.
Step-by-step guide for disassembling the final drive mechanism.
Steps for reassembling the final drive mechanism components.
Overview of crankcase disassembly and crankshaft inspection.
Procedures for removing crankcase and crankshaft.
Methods for measuring crankshaft clearances and run-out.
Steps for installing the crankshaft and crankcase.
Overview of fuel system maintenance and troubleshooting.
Procedures for servicing the throttle valve and carburetor.
Procedures for servicing float, jets, and reed valve.
Procedures for servicing the fuel pump and air cleaner.
Overview of brake system maintenance and troubleshooting.
Procedures for servicing the front disc brake system.
Procedures for servicing front and rear drum brake systems.
Steps for bleeding hydraulic disc brakes and servicing the caliper.
Illustration of all body cover components for different models.
General precautions and sequence for disassembling body covers.
Procedures for removing and installing front cover and spoiler.
Procedures for removing and installing side covers and front fender.
Procedures for servicing luggage box, floor panel, and inner box.
Maintenance info, troubleshooting, and torque values for steering/wheel.
Procedures for removing and installing the steering handle.
Procedures for removing, inspecting, and installing the front wheel.
Procedures for servicing the front shock absorber and fork.
Maintenance info, troubleshooting, and torque values for rear wheel/suspension.
Procedures for removing, inspecting, and installing the rear wheel.
Procedures for removing and installing the rear shock absorber.
Overview of electrical system maintenance and specifications.
Diagnostic guide for common electrical system problems.
Procedures for battery removal, installation, voltage check, and charging.
Procedures for servicing ignition and starting system components.
Procedures for servicing oil level switch, fuel unit, and switches.
Wiring diagram for the DD 50 scooter's electrical system.
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