Honda CB750K – CycleChaos

6 Feb 2015 | Author: | Comments Off on Honda CB750K – CycleChaos
Honda CB 400 Super Four Special Edition

Contents

History

In June of 1968, Honda dropped the gauntlet that would forever change the world of motorcycling. The CB750 Four offered a combination of features never before seen on a single motorcycle. No longer would Honda be known as scooter company.


At the heart of the CB750K was an inline four-cylinder engine with a single overhead cam, four carburetors, four-into-four exhaust pipes. It produced 67 horsepower at 8000 rpm which was 15-percent more power than BSA ‘s new 750 cc Rocket 3 even though they weighed about the same (just under 227 kg (500 pounds)). The Honda, obviously, was much faster.

It was not just the four-cylinder engine that caused such a stir; though most contemporary competitors had twin cylinders, fours had been offered by several manufacturers in the past. Rather, it was the fact that the four-cylinder power and smoothness was joined by a five-speed transmission, electric starter, a front disc brake, and a nearly bullet proof designthe first ever on a street bikeall at a reasonable price.

The single cam version was produced without much refinement until 1978 when it was replaced with a long awaited, more modern, double cam model.

Honda also sold a race kit to convert the CB750 into a Honda CR750 race ready bike.

In 1975 Honda introduced the F or SuperSport model which had a rear disc brake and a 4 into 1 header as well as some other cafe inspired additions. The same year they also introduced the A or HondaMatic model which was a clutchless 2-speed model with a wet sump lubrication system.

Honda also produced smaller fours in 350,400,500 ,550 and 650 displacements.

Earlier CB750s were produced with sand-cast cases that had a rough finish, later models had smoother castings. Those early sand-cast models have become the most valuable to collectors.

By 1970, Dick Mann piloted a race-prepped CB750 into the winner’s circle at the Daytona 200 and the world of spurring aftermarket upgrades to the CB750. The CB750 is also credited with casting the mold for what would later be called the Universal Japanese motorycle‎ , a breed of machines that would bring the Motorcycle manufacturers of England to their collective knees.

Under development for one year, when finally introduced to the market, The CB750 offered two unprecedented features: its disc brake and its inline four cylinder engine — neither of which were previously available on mainstream, affordable, production bikes. These two features, along with the bike’s introductory price of $1495.00 (US), gave the CB750 considerable advantage over its competition, particularly its British rivals.

Cycle Magazine called the CB750 the most sophisticated production bike ever upon its introduction. Cycle World called the motorcycle a masterpiece, highlighting Honda’s painstaking durability testing, the bike’s 120mph top speed, the fade-free performance of the braking, the comfortable ride, and excellent instrumentation .

As the first modern four cylinder machine from a mainstream manufacturer, the term Superbike was coined to describe the CB750. The bike offered other important features, both great and small that added to its compelling value: electric starter, kill switch, dual mirrors, flashing turn signals, screw on oil filter, maintenance free valves and overall smoothness and freedom from vibration both underway and at a standstill. On the other hand, the bike was difficult to get on its center stand and tended to throw chain oil on its muffler.

Unable to accurately gauge demand for the new bike, Honda limited its initial investment in the production dies for the CB750 by originally using a technique called permanent mold casting (often erroneously referred to as sand casting) rather than die-casting for the engines — unsure of the bike’s reception. The bike remained in the Honda lineup for ten years, sales totaling over 400,000 copies in its life span

The CB750 is sometimes referred to as a Universal Japanese Motorcycle or UJM, although certainly the bike has earned notoriety of its own. The Discovery Channel ranked the Honda CB750 among the top ten greatest motorbikes of all time, giving the CB750 third place.

Models – SOHC

The single overhead cam models were produced from 1969 through 1978.

1969 CB750K or CB750K0

1971 CB750K1

1972 CB750K2

1973 CB750K3 (US-only, K2 elsewhere)

1974 CB750K4 (US/Japan-only, K2 elsewhere)

1975 CB750K5 (US-only, K2/K4 elsewhere), CB750F

1976 CB750K6, CB750F1, CB750A

1977 CB750K7, CB750F2, CB750A1

1978 CB750K8 (US-only), CB750F3, CB750A2

DOHC

1979-1982 CB750K

1979 CB750L 10th Anniversary Edition

1979-1981 CB750F

1982 CB750SC Nighthawk

1991-2003 CB750 Nighthawk

Nighthawk 750

From 1991 through 2003, Honda produced a CB750 known as the Nighthawk 750. It is a more utilitarian machine, a useful and reliable model, notable for its low maintenance needs.

As sport-bikes and cruisers began to dominate the motorcycle marketplace in recent years, the Nighthawk was Honda’s attempt to recapture the middle of the market with a standard or UJM (Universal Japanese Motorcycle) design. The bike never sold to its maker’s lofty expectations.

2007 CB 750

In 2007, Honda Japan announced the sale of a new CB 750 very similar to the models sold in the 1970s. Announced were the CB 750 Special Edition (list price 798,000 yen) which is in the silver colors of the CB 750 AMA racer of the 1970s, and the CB 750 (list price 730,000 yen) in 3 color schemes reminiscent of CB 750s sold previously. As of August 2007, these bikes have only been announced for the Japan domestic market.

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