Honda CB750A matic

Honda CB750

Manufacturer	Honda
Also called	CB750K 2nd. edition, CB 750 K 2nd. edition, CB750A matic, CB 750 A matic, CB750F SS, CB 750 F SS, CB750F 1, CB 750 F 1, CB750F SuperSport, CB750F 2, CB 750 F 2, CB750 (reduced effect #2), CB 750 (reduced effect #2), CB750 (reduced effect), CB 750 (reduced effect), CB750F2 Seven-Fifty, CB 750 F2 Seven-Fifty, CB750 Sevenfifty, CB 750 Sevenfifty, CB750 Seven-Fifty, CB 750 Seven-Fifty, CBX750F, CB750 Seven Fifty, CB750SC Nighthawk, CB750K, CB750F, CB750C, CBX 750 F, CB 750 Seven Fifty, CB 750 SC Nighthawk, CB 750 Nighthawk, CB 750 K, CB 750 F2, CB 750 F, CB 750 C, CB 750, CB750 Nighthawk, CB750F2
Production	1975
Engine	Four stroke, transverse four cylinder, SOHC, 2 valve per cylinder.
Compression ratio	9.2:1
Top speed	158 km/h
Ignition type	Battery induction coil
Transmission	2 Speed
Frame type	Painted steel
Suspension	Front: Telehydraulic forks Rear: Swingarm with dual shocks.
Brakes	Front: Single 296mm disc Rear: Single 296mm disc
Front Tire	3.25-19
Rear Tire	4.00-18
Wheelbase	1480 mm / 58.3 in
Weight	245 kg / 540.1 lbs
Fuel capacity	19.5 Liters /
Manuals	Service Manual
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It could reach a top speed of 158 km/h.

Engine

The engine was a Air cooled cooled Four stroke, transverse four cylinder, SOHC, 2 valve per cylinder.. The engine featured a 9.2:1 compression ratio.

Chassis

It came with a 3.25-19 front tire and a 4.00-18 rear tire. Stopping was achieved via Single 296mm disc in the front and a Single 296mm disc in the rear. The front suspension was a Telehydraulic forks while the rear was equipped with a Swingarm with dual shocks.. The CB750A matic was fitted with a 19.5 Liters / fuel tank. The bike weighed just 245 kg / 540.1 lbs. The wheelbase was 1480 mm / 58.3 in long.

Photos

Overview

Honda

CB750A Hondamatic

The part of riding a motorcycle that newcomers typically find most difficult is balancing clutch and throttle control when taking off from a standstill. So a motorcycle without a clutch should be a no-brainer — shouldn’t it? That’s presumably what Honda thought when they brought the Honda CB750A Hondamatic to market in 1976. Superficially, the A model can be thought of as a Honda CB750F with a torque converter and two-speed transmission instead of the regular bike’s five-speed cog box. In practice, though, the 736cc inline four got pretty much a complete makeover. Revisions to the combustion chambers lowered compression, which, with smaller carbs, camshaft changes and a four-into-one exhaust revised the power curve for more low-down thrust to suit the characteristics of the torque converter. An accelerator pump fitted to the number two carburetor (but feeding all four) helped to alleviate a known flat spot off idle in the standard power delivery of the Honda CB750F. A new Hy-Vo chain drove a jackshaft behind the crank, and powered the torque converter’s oil pump, with gear drive to the two-speed tranny. To provide an oil bath for the transmission and torque converter, the engine’s lubrication was switched from dry to wet sump. Just two speeds? With the torque converter doing the hard work, that’s all Honda’s suits decided it needed. But while the torque converter replaced the clutch, shifting between the two gears was done manually with a conventional foot pedal. The reason? Honda figured an unexpected shift mid-turn might alarm an inexperienced rider — arguably their target demographic. In any case, the Honda CB750A would comfortably pull away from a standstill in high gear (“drive”): it just did it more quickly in “low.” For the engine to turn when the starter was pressed, the transmission had to be in neutral. And if you forgot to shift into neutral before parking the Honda CB750A, deploying the side stand would do it for you. Both of these features were obviously intended to prevent unintended launches. Similarly, a push-button parking brake acting on the rear wheel prevented the bike from rolling away if parked on a slope, there being no direct gear linkage between engine and wheels. Even after the brake button was released, the brake remained on and the bike wouldn’t roll until the rider dabbed the brake pedal. Instruments were also different on the Honda CB750A Hondamatic. No tachometer was fitted, although the speedometer showed the maximum speeds in low and drive, 60 and 105mph, respectively. Idiot lights indicated low, drive and neutral, as well as more usual functions like oil pressure, high beam and turn indicators.

Model History

The CB750A Hondamatic 750 was sold in 1975 in Canada -- one year before it was offered in the USA. It was available in one of two colors: Muscat Green Metallic or Candy Antares Red. The exhaust system was a 4-into-1. The bike had wire spoke wheels with aluminum rims. The transmission was a 2-speed with a fluid torque converter. The engine was a 736cc SOHC 2-valve air-cooled inline 4 cylinder with a chain drive. The serial number began CB750A-6000001.

The CB750A'76 Hondamatic 750 was introduced into the USA in 1976 but the Hondamatic had been sold in Canada in 1975. It was available in one of two colors: Muscat Green Metallic or Candy Antares Red. The exhaust system was a 4-into-1. The bike had wire spoke wheels with aluminum rims. The transmission was a 2- speed with a fluid torque converter. The engine was a 736cc SOHC 2-valve air-cooled inline 4 cylinder with a chain drive. The serial number began CB750A-7000001.

The CB750A'77 Hondamatic 750 was sold in 1977 in one of two colors: Candy Sword Blue or Candy Presto Red. The exhaust was now a 4-into-2. The gas tank and side covers had gold pinstripes. The bike had wire spoke wheels with aluminum rims. The transmission was a 2-speed with a fluid torque converter. The engine was a 736cc SOHC 2-valve air-cooled inline 4 cylinder with a chain drive. The serial number began CB750A-7100001.

The CB750A'78 Hondamatic 750 was sold in 1978 in one of two colors: Candy Alpha Red or Candy Polaris Blue. The bike had comstar wheels. The gas tank and side covers had gold pinstripes. The exhaust was a 4-into-2. The transmission was a 2-speed with a fluid torque converter. The engine was a 736cc SOHC 2-valve air-cooled inline 4 cylinder with a chain drive. The serial number began CB750A-7200001.

Make Model	Honda CB750A Hondamatic
Year	1975
Engine Type	Four stroke, transverse four cylinder, SOHC, 2 valve per cylinder.
Displacement	736 cc / 44.9 cu-in
Bore X Stroke	61 х 63 mm
Cooling System	Air cooled
Compression	9.2:1
Induction	4x 28mm keihin carburetors
Ignition	Battery induction coil
Starting	Electric
Max Power	69 hp @ 8000 rpm
Max Torque
Transmission	2 Speed
Final Drive	Chain
Frame	Painted steel
Front Suspension	Telehydraulic forks
Rear Suspension	Swingarm with dual shocks.
Front Brakes	Single 296mm disc
Rear Brakes	Single 296mm disc
Front Tire	3.25-19
Rear Tire	4.00-18
Rake	62.5°
Trail	115 mm / 4.5 in
Wheelbase	1480 mm / 58.3 in
Dry Weight	245 kg / 540.1 lbs
Fuel Capacity	19.5 Liters /
Consumption Average	15.6 km;/lit
Standing ¼ Mile	15.8 sec
Top Speed	158 km/h