1963 Honda C92, CS92, CB92, C95 & CA95 Shop Manual (P/N 622301)

This Honda Motor Co., Ltd. Export Department factory shop manual covers C92, CS92, CB92, C95, and CA95 models in the Honda 125 and Honda 150 families. The preface is dated January 31, 1963.

• Engine repair: Step-by-step removal, dismantling and reassembly procedures, including cylinder-head and cam-chain work, piston inspection, and crankshaft and connecting-rod service.

• Clutch and transmission: Clutch inspection and assembly, transmission and kick-starter repair, and rotary- versus return-type shifting mechanisms.

• Fuel and lubrication: Carburetor overhaul and adjustment, plunger oil-pump inspection, centrifugal oil-filter service, and early and late breather arrangements.

• Chassis service: Front-fork and shock-absorber work, rear suspension, model-specific drum brakes, wheels, drive flange, drive chain, controls, and frame fittings.

• Electrical diagnosis: Battery, charging, ignition and electric-starter service, factory service-tester checks, and separate wiring diagrams for C92/C95 and CB92/CA95 systems.

• Factory references: Production changes, the CB92 racing kit, service tools, periodic maintenance, adjustment procedures, dimensions and service limits, torque tables, and symptom-based troubleshooting.

Written for Honda servicemen and mechanics, this manual includes internal overhaul work that calls for measuring equipment, special pullers and, for crankshaft rebuilding, a press and dedicated fixtures.

Engine Repair and Routine Adjustments

The engine chapters take the OHC unit from removal through inspection and reassembly. Cylinder-head work covers valves, guides, seats, rocker gear, camshaft inspection and cam-chain installation. Cylinder and piston sections explain bore inspection, reconditioning, ring fitting and assembly.

Crankshaft coverage includes bearing inspection, connecting-rod checks, runout measurement, dismantling and press assembly. Clutch and transmission sections add component inspection, shift-fork and shift-drum assembly, and kick-starter installation.

Factory adjustment sections address ignition timing, valve tappet clearance, carburetor setting, clutch free play, drive-chain tension, cam-chain adjustment, brakes, throttle controls, shift pedal and lights. Filter and strainer cleaning accompanies the periodic maintenance chart.

Assembly cautions: Notes cover piston-ring marks, piston-arrow direction and drive-chain master-link clip orientation. Cylinder-packing alignment matters because misplaced packing can obstruct the engine’s oil passages; carburetor cleaning cautions address damage to calibrated passages from metal probes.

Chassis Variants and Suspension Limits

Chassis repair extends through the swingarm, wheels, hubs, brakes, drive flange, fuel tank and tap, intake and exhaust systems, frame fittings and controls. Seat, speedometer and steering-lock service are also covered.

Variant detail helps prevent parts mismatches: the manual distinguishes the C92/CA95 rear-brake arrangement with one anchor pin from the CB92 two-anchor-pin layout and shows different rear-wheel drive dampers for standard and sports configurations. CB92 front-brake service includes synchronization of its paired operating cams.

Front shock-absorber procedures cover spring removal and inspection, but internal damper-piston dismantling is not recommended; leaking or defective units are replaced. Rear suspension instructions likewise call for damper-assembly replacement when the rod is damaged or oil leaks.

Production Changes and CB92 Racing Equipment

Build identification matters on these early twins. The rotary C92 shift mechanism applies through C92E-12000, while the later return-type mechanism and its related parts are documented separately. Tachometer-drive cylinder-head and camshaft changes begin with CB92E-010511 and CA95E-010139; the racing-kit section lists the additional gearbox and cylinder-head components needed on earlier engines.

The final design-change sheets document reinforced crankshafts, larger bearings, strengthened crankcase bearing housings and revised head-cover breather routing. They also show pipe-handlebar changes with relocated turn signals and a drive-chain-cover window for clutch-cable replacement. The CII92, CII95 and CIIS92 references on these sheets concern those specific changes.

The CB92 racing-kit chapter identifies high-compression pistons and thin rings, starter-motor and dynamo delete parts, a higher-efficiency ignition coil and colder-range spark plugs. It also covers racing sprockets, a racing camshaft, reinforced exhaust valves, carburetor jets for megaphone exhausts and an early-engine tachometer conversion.

Frame equipment includes megaphone diffuser pipes, a racing seat, heavy-duty front and rear shock units, low handlebars, tire and final-drive options, and tachometer hardware.

Electrical Tests, Drawings and Service Tools

Electrical sections cover the selenium rectifier, spark advancer, distributor and simultaneous-ignition arrangements, electric starter and overrunning clutch. Lights, horn, turn signals, switches and wiring-harness connections are included.

The service-tester table identifies current and continuity checks, resistance and insulation testing, condenser capacity, AC voltage, DC current, engine speed, dynamo output, ignition-coil performance and timing checks.

Well over 100 factory figures support the text. Examples include a clutch sectional view, exploded transmission and shifting assemblies, oil-filter and oil-pump sections, front-fork drawings, electric-starter and overrunning-clutch views, a headlight beam-pattern chart, tool plates and the model-group wiring diagrams.

Special tools include the C-903 piston-ring compressor, C-904 dynamo-rotor puller, C-910 timing-gear puller, and C-921 crankshaft-bearing puller, plus valve-seat cutters, a valve-guide reamer and component-holding tools.

Troubleshooting is organized by symptoms such as hard starting, low power, erratic running or misfire, excessive oil consumption or exhaust smoke, rough clutch engagement and incorrect gear shifting. Further entries address engine noise, steering problems and brake faults.

Brake, fuel-system, electrical, and spring-loaded suspension work can create fire, shock, or stored-energy hazards. Confirm the model and engine-number build before selecting parts, support the motorcycle securely, and use the specified pullers or compressors where required.

Examples of Tappet and Clutch Service Data

The valve-adjustment section specifies 0.1 mm clearance for both intake and exhaust tappets with the engine cold. Clutch adjustment data gives 10–15 mm of free play at the clutch lever.

The component inspection tables distinguish standard dimensions from repair limits. For the clutch friction discs, they list 3.5 mm standard thickness and a 3.0 mm repair limit.

PDF Search, Diagram Detail and Page Count

Search and diagram viewing: PDF text search and embedded bookmarks are not available. Small labels and wire codes in the wiring diagrams require enlargement; the diagram pages are sideways in the file.

Supplied as a ZIP containing one printable 174-page PDF in English. The total includes the cover, preface, two contents pages and 170 numbered pages; the two final design-change pages are already included.