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General| Displacement | 49cc |
|---|---|
| Fuel System | Carburetor |
| Ignition | CDI |
| Final Drive | Chain |
| Front Suspension | Telescopic fork |
| Rear Suspension | Swingarm |
| Front Brake | Drum |
| Rear Brake | Drum |
| Engine Type | 2-stroke, single cylinder |
| Cooling | Air-cooled |
| Bore x Stroke | 40.0 mm x 39.2 mm |
Explains notations like NOTE, CAUTION, and WARNING for procedures.
Describes sequential, step-by-step procedures and the notation system.
Explains the use of exploded diagrams before disassembly sections.
Symbols 1-9 indicate chapter number and content.
Symbols 10-16 identify specifications in text.
Symbols 17-23 indicate lubricant grade and location.
Details Vehicle and Engine Serial Numbers.
Covers preparation for disassembly and general precautions.
Recommends genuine parts and proper fluids for assembly.
Guidelines for replacement and cleaning of seals and gaskets.
Specifies replacement of lock washers and cotter pins.
Instructions for installing bearings and oil seals correctly.
Lists special tools required for tune-up, engine, chassis, and electrical services.
Provides model, dimensions, engine type, and basic weight.
Details fuel tank capacity, carburetor specs, spark plug type, and clutch type.
Covers transmission gears, frame type, and tire specifications.
Details brake types, suspension, and electrical system components.
Engine specifications like bore, taper, piston, and ring clearances.
Crankshaft, clutch, and transmission measurements and limits.
Specs for air filter, carburetor jets, reed valve, and autolube pump.
Specifies torque values for various fasteners across different assemblies.
Details steering system, suspension, wheels, and frame specifications.
Specs for rear wheel, drive chain, front and rear brakes.
Tightening torques for chassis components like frame, steering, and forks.
Ignition system, CDI, ignition coil, and spark plug cap specifications.
Specs for charging system, flywheel magneto, and voltage regulator.
Specifications for flasher relay and circuit breaker (fuse).
Standard torque chart for fasteners.
Defines measurement units used in the manual.
Lists engine lubrication points and recommended lubricant types.
Lists chassis lubrication points and recommended lubricant types.
Illustrates routing for various cables and hoses on the motorcycle.
Explains the importance of preventive maintenance for vehicle operation.
Chart detailing recommended service intervals for various items.
Procedures for removing and installing front and side cowlings.
Steps for adjusting the engine's idle speed.
Procedure for checking and adjusting throttle cable free play.
Steps for adjusting the autolube pump cable.
Procedure for measuring and adjusting the autolube pump stroke.
Instructions for bleeding air from the autolube pump system.
Guide for inspecting the spark plug's condition and type.
How to check and adjust ignition timing.
Procedure for checking the engine oil level and recommended oil.
Steps for checking transmission oil level and warning light function.
Guide for draining and refilling transmission oil.
Procedure for adjusting the clutch free play.
Steps for removing, cleaning, and installing the air filter element.
How to inspect the carburetor joint for leaks or damage.
Inspecting fuel lines for cracks or damage.
Inspecting the Y.E.I.S. hose for cracks or damage.
Checking the exhaust system for leaks or damaged gaskets.
Adjusting front brake lever free play.
Adjusting rear brake pedal free play.
Checking brake fluid level and type.
Inspecting front brake pads for wear.
Inspecting rear brake shoes for wear.
Adjusting the rear brake light switch.
Inspecting brake hoses for cracks or leaks.
Procedure for checking and adjusting drive chain slack.
Steps for cleaning and lubricating the drive chain.
Procedure for adjusting steering head bearings.
Guide for inspecting tire pressure, surfaces, and tread depth.
Inspecting wheels for damage or bends.
Inspecting and lubricating control cables.
Lubricating lever and pedal pivot points.
Lubricating the sidestand pivot points.
Procedures for checking battery fluid level, terminals, and specific gravity.
Steps for inspecting and replacing fuses.
Adjusting the vertical and horizontal headlight beam.
Steps for replacing the headlight bulb.
Steps for removing the engine from the motorcycle.
Detailed instructions for disassembling engine components like cylinder head and clutch.
Inspecting and repairing cylinder head, cylinder, and piston components.
Measuring piston ring side and end clearance.
Lubricating, installing, and checking the piston pin and bearing.
Inspecting and measuring clutch plates, springs, and dampers.
Inspecting primary drive gear teeth and kick starter components.
Inspecting transmission gears, shifter forks, and axle runout.
Measuring crankshaft runout, free play, and side clearance.
Washing and inspecting crankcase halves and oil passages.
Inspecting the autolube pump delivery line and output.
Assembling crankshaft, shifter, and transmission components.
Assembling crankcase halves with proper sealing.
Installing piston, cylinder, and cylinder head with gaskets.
Steps for reinstalling the engine assembly onto the motorcycle.
Steps for removing the carburetor assembly for cleaning or inspection.
Instructions for disassembling carburetor components like the float chamber.
Inspecting carburetor body, fuel passage, float, and needle valve.
Procedures for reassembling the carburetor, including float height adjustment.
Steps for reinstalling the carburetor and adjusting idle speed.
Detailed guide for adjusting fuel level and other carburetor settings.
Steps for removing the reed valve assembly.
Instructions for installing the reed valve assembly.
Steps for removing the front wheel assembly.
Inspecting front wheel components like axle and bearings.
Measuring wheel runout and checking wheel bearings.
Procedures for installing the front wheel, including grease application.
Steps for removing the rear wheel assembly.
Inspecting rear wheel components like axle, brake drum, and shoes.
Measuring brake lining thickness and drum diameter.
Procedures for installing the rear wheel, including brake shoe and cam lever.
Steps for removing the drive chain and sprockets.
Checking drive chain stretch and stiffness.
Installing the drive chain and sprockets.
Steps for removing the front brake caliper and pads.
Disassembling the front brake caliper.
Disassembling the front brake master cylinder.
Inspecting and repairing front brake components like caliper piston and pads.
Assembling the front brake caliper and installing it.
Procedure for bleeding air from the front brake system.
Steps for removing the front fork assembly.
Disassembling the front fork, including draining oil and removing components.
Inspecting inner and outer fork tubes, seals, and springs.
Assembling the front fork, including installing seals and springs.
Installing the front fork assembly onto the motorcycle.
Steps for removing the handlebars and steering head components.
Inspecting steering head bearings and races.
Installing steering head components and adjusting the ring nut.
Steps for removing the rear shock absorber and swingarm.
Disassembling swingarm components.
Inspecting swingarm pivot and rear shock absorber.
Assembling the swingarm and installing the rear shock absorber.
Provides a wiring diagram for the YSR50T model.
Explains the color coding used for wires in the electrical system.
Identifies key electrical components and their specifications.
Details the ignition and starting system components and operation.
Explains the function of the ignition control circuit with various switches.
Troubleshooting steps for no spark or intermittent spark issues.
Covers the charging system, including circuit diagrams and troubleshooting.
Steps for diagnosing a battery that is not charging.
Details the lighting system, including circuit diagrams and troubleshooting.
Troubleshooting steps when meter lights or high beam indicator do not illuminate.
Steps to diagnose why the taillight is not functioning.
Covers the signal system (flashers, horn, brake lights), including diagrams and troubleshooting.
Diagnosing issues with flashers, brake lights, or horn not operating.
Information on the display system, including circuit diagrams and troubleshooting for indicators.
Diagnosing why meter lights or high beam indicator are not working.
Troubleshooting for indicator lights not coming on.
Probable causes for starting issues related to the fuel system.
Probable causes for starting issues related to the electrical system.
Probable causes for starting issues related to the compression system.
Common causes for poor idle speed performance, primarily carburetor related.
Causes for poor performance at medium and high speeds related to fuel.
Causes for poor performance at medium and high speeds related to electrical systems.
Probable causes for hard gear shifting, related to clutch and transmission oil.
Causes for a non-functional change pedal.
Causes for gears jumping out during operation.
Probable causes for clutch slipping.
Probable causes for clutch dragging.
Causes for kick starter slipping.
Causes for difficulty in kicking the engine over.
Causes for the kick crank not returning to its original position.
Probable causes for poor braking performance.
Causes for oil leaks from the front forks.
Causes for front fork malfunctions.
Probable causes for unstable handling of the motorcycle.
Causes for a dim or non-functional headlight.
Causes for a burnt-out bulb in the lighting system.
Causes for flashers not illuminating.
Causes for flashers staying on continuously.
Causes for flashers blinking slower than normal.
Causes for flashers blinking faster than normal.
Causes for the horn not working.
Probable causes for engine overheating.
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