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General| Gearbox | 5-speed |
|---|---|
| Engine Type | Four-stroke, single cylinder |
| Cooling System | Air-cooled |
| Front Suspension | Telescopic forks |
| Front Brake | Single disc |
| Rear Brake | Drum |
| Rear Suspension | Swingarm with dual shock absorbers |
Detailed engine specifications for models 488.3 and 487.3, including bore, stroke, and power output.
Specifies recommended fuel types and oil mixture ratios for the motorcycles.
Provides details on frame, wheel dimensions, brakes, and suspension components.
Lists specifications for dynamo, battery, lamps, and fuse.
Details recommended oil brands and capacities for gearbox, fork, and suspension.
Includes dry weight, load capacity, and peak speed for the motorcycles.
Procedure for adjusting clutch lever free play and semi-automatic release.
Steps for checking and tensioning the drive chain after initial mileage.
Instructions for adjusting the stop-light switch for brake activation.
Guide to setting the carburettor for running-in and after, including needle and idle speed adjustments.
Steps to adjust the engine's idle speed for smooth running.
Guidance on setting the spark plug gap for optimal ignition performance.
Procedure for adjusting the contact breaker point gap.
Steps to check and adjust the ignition advance timing.
Recommended methods for washing and cleaning the motorcycle exterior.
A chart indicating lubrication points and service intervals.
Lists and identifies various bearings and seals used in the motorcycle.
Classifies cylinders and pistons based on measured dimensions for proper matching.
Step-by-step instructions for removing frame components like seat, fuel tank, and forks.
Detailed steps for dismantling the engine, including cylinder head, dynamo, and clutch.
Procedure for checking the cylinder head for damage or thread condition.
Guidance on assessing cylinder wear and the process of reboring.
Inspecting pistons for wear, pitting, and checking gudgeon pins.
Checking piston ring gap and condition for proper sealing.
Procedures for checking crankshaft alignment and bearing run-out.
Steps for preparing and assembling crankcase halves, including bearing installation.
Guide for installing key engine parts like clutch, piston, cylinder, and dynamo.
Instructions for removing, inspecting, and reassembling the front fork.
Procedure for removing the motorcycle's stand and foot-rests.
Steps for dismantling the foot-operated rear brake controls.
Procedure for removing the rear swinging fork assembly.
Instructions for dismantling and servicing the rear telescopic shock absorbers.
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