1986-1991 Yamaha Jog 50, CE50, CG50 Scooter Service Manual

Comprehensive service documentation for the Yamaha Jog 50, CE50, and CG50 scooters, covering disassembly, repair, and assembly with detailed diagrams. Part Number: LIT-11616-05-43.

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Document Details

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Document Number / Seller:
27364 / Susan Smith
File Size:
28.98 MB
File Type:
ZIP
Language:
English
Printable:
Yes
Category:
Scooter
Last updated / verified
Aug 13, 2025

Models Covered & Key Technical Specifications

Yamaha Jog 50, CE50, CG50 (LIT-11616-05-43) -- 1986-1991 Official repair procedures for Yamaha scooters | Factory Service Manual.

  • Published Engine Type: Air cooled 2-stroke, gasoline torque induction establishes the core engine Architecture.
  • Specific Bore x Stroke: For accurate internal measurements, 40.0x39.2 mm (1.57 x 1.54 in) defines the bore and stroke Topology.
  • Integral Compression Ratio: 7.2:1 -- signifies the engine's compression efficiency Threshold.
  • Operational Lubrication System: The autolube system uses separate lubrication for optimal operation Logic.
  • Established Battery Type: GM4-3B is the standard battery type for reliable power Parameters.
  • Authorized Starter Type: Electric and Kick Starter ensures versatile engine starting Protocol.

Professional Workshop Service Manual & Technical Specifications

Definitive Procedure Workshop Manual: Yamaha Jog 50, CE50, CG50 Repair Overhaul-Reference

Serial-Range: 1986-1991 // System-Coverage: Engine, Chassis, Electrical, Carburetion, Lighting, Signal, Auto Choke // Serial-Range: LIT-11616-05-43.

Metric System-Path Calibration-Data
Overall Length 1,560 mm (61.4 in) N/A
Overall Width 615 mm (24.2 in) N/A
Overall Height 953 mm (37.5 in) N/A

Technical content addresses the following systems and procedures:

Engine Overhaul

This section details engine removal, disassembly, inspection, repair, and assembly, including crankshaft and crankcase procedures, transmission, autolube pump, CDI magneto, starter system, primary and secondary sheave, piston pin and piston, and cylinder head.

Carburetion

It covers auto choke systems, carburetor constituents, operation, section views, removal, disassembly, inspection, assembly, installation, and auto choke unit checks, along with reed valve removal and inspection.

Chassis

This manual documents front and rear wheel procedures, including removal, inspection, and assembly (brake shoe plate), as well as front fork and steering disassembly and inspection, and rear shock absorber removal and inspection.

Electrical System

Key electrical components, starting systems, ignition systems, charging systems, lighting systems, signal systems, and auto choke systems are covered, including circuit diagrams and troubleshooting charts.

This manual documents torque specifications for engine components to ensure proper cyclic stress resistance.

FAQ

What **tools** are required for the engine adjustment procedures? keyboard_arrow_down

Inductive Tachometer (YU-08036) and Compression Gauge (YU-33223) are required for engine tune-up and compression measurement procedures.

Identify the **critical** clearance specifications for the piston rings. keyboard_arrow_down

0.03-0.05 mm (0.0012-0.0020 in) is the standard side clearance for both top and 2nd piston rings, with a wear limit of 0.10 mm (0.004 in).

What **procedures** are required for the starter motor assembly? keyboard_arrow_down

Starter motor assembly requires installation of the armature coil, brush, brush spring, and O-ring, with the starter motor itself torqued to 9 Nm (0.9 m-kg, 6.5 ft-lb).

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The download process was incredibly smooth, and I received the link almost instantly. The manual is detailed and easy to follow, making repairs a breeze. Highly recommend!