1969-1978 Honda CB750, CB750F Factory Shop Manual
Honda Models Covered & Key Technical Specifications
Models: Honda CB750, Honda CB750F
Sub-models / Variants: CB750K1, CB750K2, CB750K3, CB750K4, CB750K5, CB750F1, CB750K6, CB750K7, CB750F, CB750K
Model Years: 1969–1978
Serial Numbers: CB750 1000001–, CB750K1 1055004–, CB750K2 2000001–, CB750K3 2200001–, CB750K4 2341915–, CB750K5 2525947–, CB750F 1000002–, CB750F1 2000003–, CB750K6 2540001–, CB750K7 2700002–, CB750F 2100001–, CB750K 2800001–, CB750F 3100002–
Technical Data:
- Engine: Air-cooled, 4-stroke, OHC, 4-cylinder in-line
- Displacement: 736 cc (44.93 cu-in)
- Compression Ratio: 9.0:1
- Horsepower: 67 BHP at 8,000 rpm
- Transmission: 5-speed, constant mesh
- Starter: Electrical motor and kick starter
- Ignition: Battery and ignition coil
- Alternator: Three-phase A.C., 12 V, 0.12 kW at 5,000 rpm
- Tire Pressure: 28 psi front and rear
Honda Manual Features & Content Preview
- Covers 1969–1978 Honda CB750 and CB750F motorcycles, detailing K1 through K7 variants along with frame-specific service configurations
- Official 1977 Honda publication documenting original factory specifications and exact procedural workflows
- Contains over 150 exploded-view diagrams mapping out the engine, transmission, clutch pack, and complete electrical harness
- Serves as the definitive reference for the CB750 launch series, maintaining precise alignment with the 4-cylinder OHC production run
Engine and Transmission Systems
This manual maps out the architecture of the 736 cc 4-stroke OHC engine. Mechanics get a clear view of the dry-sump lubrication network, camshaft drive mechanisms, and the complete multi-carburetor assembly. The documentation details component inspection metrics for both the clutch pack and the 5-speed constant mesh transmission. It provides the exact standard values and serviceable limits required to check gear backlash, shift fork clearance, and shaft wear accurately. Whenever executing heavy teardowns or testing vintage high-amperage charging circuits, always enforce standard workshop safety protocols to prevent component damage or personal injury.
Additional chapters break down electrical diagnostics, ignition timing, and periodic maintenance. The reference material includes testing parameters for the Hitachi alternator, voltage regulator, and ignition coils. It also covers battery capacity baselines and charging current procedures mapped across all engine RPM ranges.
Critical Specifications and Tolerances
Factory tolerances make or break a vintage rebuild. The data tables outline exact figures for the 12 V electrical system and valvetrain adjustments. Tappet clearances dictate 0.05 mm for the intake and 0.08 mm for the exhaust. Engine mechanical data confirms the intake valve timing opens at exactly 5° before top dead center. Fuel delivery references list a #120 main carburetor jet to feed the system from the 18-liter tank. Access to these hard data points, serial number ranges, and adjustment procedures eliminates guesswork during bench overhauls or routine shop maintenance.
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