Four was sold from 1969 to 1970 and was available in
one of three colors: Candy Blue Green, Candy Gold, or Candy Ruby Red. The tank,
side covers, and upper forks were of the basic color (green, gold, or red). The
headlight shell was also the basic color. The bike had a 4-into-4 throttle cable
system. The exhaust system was a 4-into-4. The engine was a 736cc SOHC 2-valve
dry sump inline 4 cylinder linked to a 5-speed transmission and chain drive. The
serial number began CB750-1000001.
Honda CB 750 Four K0
Air cooled, transverse four cylinder, four stroke, SOHC, 2
valve per cylinder.
Honda's 750-four was the original superbike; the
machine that redefined the limits of motorcycle performance almost
overnight. Actually born in the Sixties it was unveiled at the Tokyo
Show in October 1968, and released in limited numbers the following year -
the CB750 dominated the early Seventies and had a huge influence on the
machines that followed it. Until the arrival of the Honda, with its broad
bank of aircooled cylinders and four shining mufflers, mass-produced fours
simply did not exist.
The CB750 changed all that and went further,
combining its basic appeal with a competitive price that included
refinements such as a disc front brake and electric starter. It was
the Honda's engine that created all the impact. The angled-forward 736cc
unit's design used many lessons learnt during Honda's days of racing
multi-cylinder machines in the Sixties, although the roadster relied on a
single overhead camshaft and two valves per cylinder, in contrast to the
racers with their twin cams and four valves per pot.
The CB750's output of 67bhp was mighty
impressive at the time, though, as were the smoothness and reliability with
which it was delivered. The CB was designed as an all-rounder, with a view
to sales in the important American market, but was good for over 120mph
despite its high, wide handlebars. Handling, however, was only
adequate, with the flex-prone steel frame and harsh suspension later coming
in for criticism. But in the excitement of the CB's arrival few riders were
put off by that - especially after veteran Dick Mann had proved the four's
sporting potential by winning at Daytona in 1970.
Honda sat on their laurels a little, barely
updating the 750 even when Kawasaki launched the faster 900cc Z1 four years
later. In fact, the CB was detuned slightly over the years to reduce
emissions. When Honda finally revamped it in 1976 with the so-called Super
Sports CB750F - complete with flat handlebars, bright yellow paint and a
four-into-one exhaust — the new bike's top speed was only 115mph.
The single-cam CB750 soldiered on for a full
decade, finally being replaced by the 16-valve CB750K-a disastrous bike that
combined poor handling with a series of mechanical problems. Bui the memory
of that first great superbike remains with the faithful.
Source of review: Roland Brown
One of the most significant
machines in recent motorcycling history, the CB750 Four
featured a 4-cylinder engine reminiscent of the Honda RC
racers. The 750 Four had a terrific exhaust note resonating
from four exhausts and, in a first for a production
motorcycle, a top speed of over 200 km/h (~125mph). The
incredible 750cc 4-cylinder engine featured a wealth of
technology developed from sixties era GP racers.
Features included Honda's
first one-piece crankshaft, a dry sump design and a level of
reliability never before seen. Like the RC racers, the CB750
was a high-rpm, high-power machine kicking out an un-heard
of 67 HP at 8,000rpm. Harnessing this impressive power was
an RC-type double-cradle frame and, in another breakthrough,
a front disc brake.
Other components, like tires
and chains, were also of especially high quality. The CB750
brought a new level of performance and sophistication to the
world of motorcycles, making it an instant top seller.
Truly, this was a machine that changed the history of
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