1981 Honda CB 750F Specifications

Name: 1981 Honda CB 750F
Brand: Honda

No images available

Tap to enlarge

1981 Honda CB 750F Overview

The 1981 Honda CB 750F is a naked bike motorcycle built around 748 cc of displacement. Under the tank sits an In-line four engine running DOHC valve actuation, a compression ratio of 9.0:1. 1981 Honda CB 750F delivers 57 kW @ 9000 rpm of peak power and 77,4 Nm @ 8000 rpm of torque. The factory-quoted top speed stands at 198.3 km/h, making it a capable performer in its class. From a practical standpoint, the 1981 CB 750F tips the scales at 251 kg, carries a 20-litre fuel tank, offers a seat height of 790 mm and spans a 1520 mm wheelbase. Scroll down for the complete 1981 Honda CB 750F spec sheet covering every technical detail from suspension travel to tyre sizes.

1981 CB 750F - Pros & Cons

Strengths

Strong power output: 1981 Honda CB 750F makes 57 kW @ 9000 rpm with 77,4 Nm @ 8000 rpm of torque - competitive figures for its class.
Large fuel range: The 20-litre tank is generously sized, translating to extended range between stops - ideal for touring or longer commutes.

Considerations

Age-related wear: As with any used CB 750F, a thorough pre-purchase inspection covering consumables, service history and tyres is always recommended.

Owner Experiences & Common Issues

Valve clearance checks

DOHC engines should have valve clearances checked at the manufacturer's specified interval. Owners report that clearances can tighten over time on higher-mileage bikes, leading to slight ticking from the top end. Catching it early keeps the job simple and avoids more costly remediation.

Low-speed confidence

At 251 kg, the CB 750F is a substantial machine. New owners occasionally mention that slow-speed manoeuvring in car parks takes a little getting used to. Once moving, the weight disappears - but practising slow-speed exercises builds confidence quickly.

CB 750F - Buying & Maintenance Guide

What to check before buying

When inspecting a used 1981 Honda CB 750F, start with the basics: check the service book for oil change frequency, inspect the chain and sprockets for wear, and look for oil seepage around the engine casings and rocker covers. A cold start test is invaluable - a well-maintained CB 750F should fire up cleanly and settle to a smooth idle within a few seconds.

Oil and filter changes

Regular oil changes are the single most important maintenance task on any CB 750F. Stick to the manufacturer's interval - typically every 6,000 km or once a year, whichever comes first. Always use the correct viscosity grade as specified in the owner's manual.

Valve clearance service

Check that valve clearances have been adjusted at the correct intervals on any used CB 750F. This is a job many owners skip because the bike does not immediately feel wrong - but tight clearances accelerate valve seat wear. Ask for proof it has been done.

1981 Honda CB 750F - Frequently Asked Questions

What engine does the 1981 Honda CB 750F have?

The 1981 Honda CB 750F uses an In-line four engine with 748 cc of displacement. It is air cooled.

What is the top speed of the 1981 Honda CB 750F?

The 1981 Honda CB 750F has a factory-quoted top speed of 198.3 km/h. Real-world speeds vary depending on rider weight, conditions and state of tune.

How much does the 1981 Honda CB 750F weigh?

The 1981 Honda CB 750F weighs 251 kg. This is the manufacturer's wet figure.

How much power does the 1981 Honda CB 750F make?

The 1981 Honda CB 750F produces 57 kW @ 9000 rpm of power and 77,4 Nm @ 8000 rpm of torque. These are peak figures.

What is the fuel tank capacity of the 1981 Honda CB 750F?

The 1981 Honda CB 750F has a 20-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 333-400 km between stops.

Is the 1981 Honda CB 750F suitable for shorter riders?

The 1981 Honda CB 750F has a seat height of 790 mm. This is a moderate seat height that suits a wide range of rider heights.

What brakes does the 1981 Honda CB 750F have?

The 1981 Honda CB 750F uses 2x 276mm discs at the front and Single 297mm disc at the rear.

What tyre sizes does the 1981 Honda CB 750F use?

The 1981 Honda CB 750F runs 3.50 H19 front and 4.50 H17 rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.

What gearbox does the 1981 Honda CB 750F have?

The 1981 Honda CB 750F is fitted with a 5 Speed transmission.

Honda CB 750F Spec Evolution

The Honda CB 750F was produced across 4 model years (1980-1983). The table below highlights the key specifications that changed across the production run - useful whether you are comparing years or tracking down a specific variant.

Specification	1980	1981	1982	1983
Wet Weight	253.0 kg / 557.8 lbs	251 kg / 553.3 lbs	253.0 kg / 557.8 lbs	253.0 kg / 557.8 lbs
Engine Type	In-line four	In-line four	In-line four	In-line four, four-stroke
Top Speed	203.0 km/h / 126.1 mph	198.3 km/h / 123.2 MPH	203.0 km/h / 126.1 mph	203.0 km/h / 126.1 mph
Fuel Capacity	20.00 litres / 5.28 gallons	20 Litres / 5.2 US gal	20.00 litres / 5.28 gallons	20.00 litres / 5.28 gallons
Brakes - Front	Dual disc	2x 276mm discs	Dual disc	Dual disc
Brakes - Rear	Single disc	Single 297mm disc	Single disc	Single disc
Tyres - Front	3.25-19	3.50 H19	3.25-19	3.25-19
Tyres - Rear	4.00-18	4.50 H17	4.00-18	4.00-18

Key Specifications

Engine

In-line four

Power

57 kW / 77 hp @ 9000 rpm

Torque

77,4 Nm / 57.0 lb-ft @ 8000 rpm

Top Speed

198.3 km/h / 123.2 MPH

Weight

251 kg / 553.3 lbs

Fuel Capacity

20 Litres / 5.2 US gal

Full 1981 Honda CB 750F Specifications

Year 1981

Make Model Honda CB 750F

Top Speed 198.3 km/h / 123.2 MPH

Max Power 57 kW / 77 hp @ 9000 rpm

Max Torque 77,4 Nm / 57.0 lb-ft @ 8000 rpm

Standing Start ¼ Mile 12.4 sec / 172 km/h

Engine Type In-line four

Fuel Control DOHC

Stroke 4

Displacement 748 cc / 45.6 cub in.

Engine Detail Four stroke, transverse four cylinder, DOHC, 4 valve per cylinder

Bore x Stroke 62 x 62 mm

Compression Ratio 9.0:1

Cooling System Air cooled

Fuel Consumption 37.8 mpg

Fuel Induction 4x 32mm keihin carburetors

Ignition CDI

Valve System 4

Compare Honda CB 750F

See how the 1981 Honda CB 750F stacks up against similar motorcycles.

1981 Honda CB 750F

vs 1980 Suzuki GS 750E

Build your own comparison →

Explore More

All Honda models All CB 750F years More Naked bike All 1981 motorcycles

Honda CB 750F - other years

All Honda models Naked bike Compare bikes