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Essential safety precautions for operating and maintaining the motorcycle, including ventilation and fire safety.
Guidelines for proper service procedures, including using genuine parts and tools, and maintaining cleanliness.
Detailed technical specifications for the motorcycle's dimensions, frame, engine, and other key components.
Specific torque values for engine and chassis bolts and nuts to ensure correct assembly and prevent damage.
Schematic illustrating the oil flow path throughout the engine for proper lubrication.
Procedures for checking engine oil level and performing oil and filter changes for engine longevity.
Instructions for lubricating the drive chain, including cleaning and proper saturation techniques.
Procedures for inspecting spark plugs and checking ignition timing for optimal engine performance.
Steps for inspecting and adjusting valve clearance and cam chain tension for engine timing accuracy.
Guidance on checking throttle operation and adjusting idle speed for smooth engine running.
Procedure for synchronizing carburetors using vacuum gauges for balanced engine operation.
Inspection and adjustment procedures for front (disc and drum) and rear brakes for safety.
Information on checking tire pressure, wheel spoke tightening, and tire inspection for safety.
Detailed steps for removing, separating, and assembling the carburetors for maintenance.
Procedure for disassembling the vacuum cylinder, including inspection of internal parts.
Instructions for adjusting the float level in the carburetor for correct fuel delivery.
Step-by-step guide for safely removing the engine from the motorcycle frame for servicing.
Guidance for reinstalling the engine, emphasizing proper routing of wires and cables.
Instructions for removing rocker arms and camshaft, emphasizing careful handling to prevent damage.
Procedures for measuring valve spring free length and checking valve stem-to-guide clearance.
Detailed steps for removing and installing new valve guides, including reaming and cleaning.
Steps for assembling the cylinder head, including valve stem seals, springs, and keepers.
Procedure for removing the cylinder and inspecting cylinder bores for wear and damage.
Guide for removing pistons and inspecting them for wear, damage, and ring groove condition.
Instructions for installing piston rings, ensuring correct placement of end gaps and orientation.
Steps for removing the right crankcase cover to access clutch and oil pump components.
Procedures for removing clutch components and inspecting discs, springs, and plates for wear.
Guide for removing and inspecting the oil pump, including tip, body, and end clearances.
Overview of parts to be removed before crankcase disassembly, including engine and generator.
Instructions for removing the AC generator rotor, stator, and pulser for service.
Steps for disassembling and reassembling the crankcase halves, including sealant application.
Procedures for removing and installing connecting rods, including bearing inspection and clearance checks.
Methods for inspecting crankshaft runout and starter clutch components for wear or damage.
Guide to inspecting main and connecting rod bearings, including clearance measurement and selection.
Steps for disassembling the transmission and inspecting gears for backlash and wear.
Procedures for removing, inspecting, and installing the gearshift drum and shift forks.
Instructions for assembling the kick starter mechanism, including spindle and pinion gear.
Detailed steps for removing and installing the front wheel, including axle and bearing checks.
Procedures for removing and installing the handlebar, including throttle and switch housing.
Guide to disassembling and assembling front forks, including spring inspection and oil filling.
Procedures for removing and installing the steering stem, including head adjuster and ball bearings.
Steps for removing and installing the rear wheel, including axle and bearing checks.
Inspection and replacement procedures for rear brake lining thickness and brake shoes.
Instructions for removing, disassembling, and installing shock absorbers, including spring length.
Procedures for removing, disassembling, and installing the swingarm, including pivot bolt torque.
Steps for draining, filling, and bleeding the hydraulic brake system for optimal performance.
Guide for checking and replacing front disc brake pads, ensuring proper caliper piston movement.
Procedures for disassembling and inspecting the master cylinder, including piston and cylinder dimensions.
Instructions for removing, disassembling, and assembling the brake caliper, including piston and seal checks.
Guidelines for checking battery specific gravity, removing, and charging the battery safely.
Procedures for testing the charging system output using a voltmeter and ammeter.
Methods for testing stator coil continuity and voltage regulator/rectifier resistances.
Instructions for servicing spark plugs and ignition coils, including performance testing.
Procedure for inspecting the CDI unit's continuity using an electrical tester.
Methods for inspecting AC generator stator coils and related wiring for continuity.
Steps for removing the starter motor and inspecting brushes and commutator for wear.
Inspection of field coils and procedures for assembling and installing the starter motor.
Testing the magnetic switch and referencing starter clutch service information.
Explanation of the balancer mechanism's role in counteracting inertia forces for smooth power.
Detailed explanation of how balancers create centrifugal force to neutralize engine vibration.
Description of the engine's 3-valve design and short-stroke characteristics for improved performance.
Overview of the CDI ignition system's benefits, including maintenance-free operation and improved spark.
Diagnostic guide for troubleshooting engine starting problems, from fuel to ignition issues.
Troubleshooting steps for engine power loss, poor performance at low/high speeds, and handling problems.
Scheduled maintenance intervals for the 1979 models, detailing inspection and service items.
Procedure for adjusting balancer chain tension if the chain is noisy, ensuring proper tension.
Specifications for the hydraulic disc brake system, including measurements and service limits.
Visual identification of the 1980 CB400T model, showing key features and serial number information.
Detailed metric and English specifications for the 1980 CB400T model.
Procedure for synchronizing carburetors, including idle speed and vacuum difference checks.
Instructions for adjusting carburetors for improved performance at high altitudes.
Visual identification of the 1980 CM400E model, showing key features and serial number information.
Detailed metric and English specifications for the 1980 CM400E model.
Scheduled maintenance intervals for the 1980 CM400E, detailing service items and frequencies.
Visual identification of the 1981 CB400T/CM400 models, including frame numbers.
Detailed specifications for 1981 CB400T and CM400T models, covering dimensions and engine details.
Procedure for synchronizing carburetors, including idle speed and vacuum difference checks.
Instructions for removing, disassembling, and filling front air forks with appropriate pressure.
Steps for replacing front disc brake pads, including caliper and pad pin procedures.
Essential safety precautions for operating and maintaining the motorcycle, including ventilation and fire safety.
Guidelines for proper service procedures, including using genuine parts and tools, and maintaining cleanliness.
Detailed technical specifications for the motorcycle's dimensions, frame, engine, and other key components.
Specific torque values for engine and chassis bolts and nuts to ensure correct assembly and prevent damage.
Schematic illustrating the oil flow path throughout the engine for proper lubrication.
Procedures for checking engine oil level and performing oil and filter changes for engine longevity.
Instructions for lubricating the drive chain, including cleaning and proper saturation techniques.
Procedures for inspecting spark plugs and checking ignition timing for optimal engine performance.
Steps for inspecting and adjusting valve clearance and cam chain tension for engine timing accuracy.
Guidance on checking throttle operation and adjusting idle speed for smooth engine running.
Procedure for synchronizing carburetors using vacuum gauges for balanced engine operation.
Inspection and adjustment procedures for front (disc and drum) and rear brakes for safety.
Information on checking tire pressure, wheel spoke tightening, and tire inspection for safety.
Detailed steps for removing, separating, and assembling the carburetors for maintenance.
Procedure for disassembling the vacuum cylinder, including inspection of internal parts.
Instructions for adjusting the float level in the carburetor for correct fuel delivery.
Step-by-step guide for safely removing the engine from the motorcycle frame for servicing.
Guidance for reinstalling the engine, emphasizing proper routing of wires and cables.
Instructions for removing rocker arms and camshaft, emphasizing careful handling to prevent damage.
Procedures for measuring valve spring free length and checking valve stem-to-guide clearance.
Detailed steps for removing and installing new valve guides, including reaming and cleaning.
Steps for assembling the cylinder head, including valve stem seals, springs, and keepers.
Procedure for removing the cylinder and inspecting cylinder bores for wear and damage.
Guide for removing pistons and inspecting them for wear, damage, and ring groove condition.
Instructions for installing piston rings, ensuring correct placement of end gaps and orientation.
Steps for removing the right crankcase cover to access clutch and oil pump components.
Procedures for removing clutch components and inspecting discs, springs, and plates for wear.
Guide for removing and inspecting the oil pump, including tip, body, and end clearances.
Overview of parts to be removed before crankcase disassembly, including engine and generator.
Instructions for removing the AC generator rotor, stator, and pulser for service.
Steps for disassembling and reassembling the crankcase halves, including sealant application.
Procedures for removing and installing connecting rods, including bearing inspection and clearance checks.
Methods for inspecting crankshaft runout and starter clutch components for wear or damage.
Guide to inspecting main and connecting rod bearings, including clearance measurement and selection.
Steps for disassembling the transmission and inspecting gears for backlash and wear.
Procedures for removing, inspecting, and installing the gearshift drum and shift forks.
Instructions for assembling the kick starter mechanism, including spindle and pinion gear.
Detailed steps for removing and installing the front wheel, including axle and bearing checks.
Procedures for removing and installing the handlebar, including throttle and switch housing.
Guide to disassembling and assembling front forks, including spring inspection and oil filling.
Procedures for removing and installing the steering stem, including head adjuster and ball bearings.
Steps for removing and installing the rear wheel, including axle and bearing checks.
Inspection and replacement procedures for rear brake lining thickness and brake shoes.
Instructions for removing, disassembling, and installing shock absorbers, including spring length.
Procedures for removing, disassembling, and installing the swingarm, including pivot bolt torque.
Steps for draining, filling, and bleeding the hydraulic brake system for optimal performance.
Guide for checking and replacing front disc brake pads, ensuring proper caliper piston movement.
Procedures for disassembling and inspecting the master cylinder, including piston and cylinder dimensions.
Instructions for removing, disassembling, and assembling the brake caliper, including piston and seal checks.
Guidelines for checking battery specific gravity, removing, and charging the battery safely.
Procedures for testing the charging system output using a voltmeter and ammeter.
Methods for testing stator coil continuity and voltage regulator/rectifier resistances.
Instructions for servicing spark plugs and ignition coils, including performance testing.
Procedure for inspecting the CDI unit's continuity using an electrical tester.
Methods for inspecting AC generator stator coils and related wiring for continuity.
Steps for removing the starter motor and inspecting brushes and commutator for wear.
Inspection of field coils and procedures for assembling and installing the starter motor.
Testing the magnetic switch and referencing starter clutch service information.
Explanation of the balancer mechanism's role in counteracting inertia forces for smooth power.
Detailed explanation of how balancers create centrifugal force to neutralize engine vibration.
Description of the engine's 3-valve design and short-stroke characteristics for improved performance.
Overview of the CDI ignition system's benefits, including maintenance-free operation and improved spark.
Diagnostic guide for troubleshooting engine starting problems, from fuel to ignition issues.
Troubleshooting steps for engine power loss, poor performance at low/high speeds, and handling problems.
Scheduled maintenance intervals for the 1979 models, detailing inspection and service items.
Procedure for adjusting balancer chain tension if the chain is noisy, ensuring proper tension.
Specifications for the hydraulic disc brake system, including measurements and service limits.
Visual identification of the 1980 CB400T model, showing key features and serial number information.
Detailed metric and English specifications for the 1980 CB400T model.
Procedure for synchronizing carburetors, including idle speed and vacuum difference checks.
Instructions for adjusting carburetors for improved performance at high altitudes.
Visual identification of the 1980 CM400E model, showing key features and serial number information.
Detailed metric and English specifications for the 1980 CM400E model.
Scheduled maintenance intervals for the 1980 CM400E, detailing service items and frequencies.
Visual identification of the 1981 CB400T/CM400 models, including frame numbers.
Detailed specifications for 1981 CB400T and CM400T models, covering dimensions and engine details.
Procedure for synchronizing carburetors, including idle speed and vacuum difference checks.
Instructions for removing, disassembling, and filling front air forks with appropriate pressure.
Steps for replacing front disc brake pads, including caliper and pad pin procedures.
General| Bore x Stroke | 70.5 mm x 50.6 mm |
|---|---|
| Compression Ratio | 9.3:1 |
| Transmission | 2-speed automatic |
| Final Drive | Chain |
| Cooling System | Air |
| Front Suspension | Telescopic fork |
| Rear Suspension | Dual shocks |
| Front Brake | Single disc |
| Rear Brake | Drum |
| Engine Type | Air-cooled, 4-stroke, parallel twin |
| Wheelbase | 1, 410 mm (55.5 in) |
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