Honda CB 400N
Honda CB 400N
Air cooled, parallel twin cylinder, four stroke, SOHC, 3
valves per cylinder, 360° crankshaft and
Bore x Stroke
70.5 x 50.6 mm
4x 32mm Keihin carb
26.7 hp @ 7500 rpm
24.5 ft-lb @ 8000 rpm
6 Speed / chain
Dual EVO dampers with 5-way spring preload
2x 239mm disc
Braking 60 - 0 / 100 - 0
- / 38.1 m
In 1978, nine months after the 400T was
launched, Honda followed with a multitude of changes, mainly to the styling,
which turned T to N, Dream into Super Dream. 'Eurostyling' was the name given
new look, which chiefly entailed a longer, slimmer line for the tank, running
down to supportive rear-end treatment. Silencers of more gentle taper, but set
at a steeper angle, and new paintwork contributed to the appearance of what was
generally acknowledged to be a very handsome motorcycle.
Practical differences from the N series
included twin 9.5in front discs, a six-speed gearbox, heavier front-fork springs
and improved support for the rear-fork pivot. Modifications to valve timing and
carburation were claimed to give greater performance.
race tracks. Real eye-openers, too, especially for people like you and I who
get to ride on them so infrequently, if at all Faults that might never show
up on the road can manifest themselves very quickly on the track, simply
because you can ride a bike so much closer to its limit away from normal
road hazards. Some excellent road machines become a real shambles on a
My first ride of
any consequence on the Honda CB400T was on the Nogaro Grand Prix circuit in
south¬west France last December, at the European launch of the CX500 The
little twin and the CB550 F2 were provided as yardsticks by which the merits
of the new V-twin could be assessed. The 550 four had always impressed me on
public roads, but at Nogaro it felt both slow and awkward.
The CX500, of
course, was truly superb and has gone on to win widespread acclaim from
Press and public alike. But the overall excellence of the CB400T on that wet
and twisty track came as a biq surprise to me. The bike looked stodgy, but
it proved to be fast punchy, stable, and smooth, with good suspension,
excellent roadholding, and powerful brakes. It could be thrown around with
gay abandon and ridden right to the limit without any problems. A certain
tester from a rival magazine, not noted for a lack of riding ability, even
managed to run away from some of the new V-twins aboard the 400 The popular
400 four, it seemed, had found a worthy successor.
Given that the
original package was so right, it seemed that when Honda introduced the
CB400N Super Dream in the spring of 1978 nobody could fail to be impressed
The stocky, stubby look had been replaced by new styling specially for the
European market; the saddle was a tad lower; twin discs like those fitted to
the CX500 now graced the front end; and a whole host of internal changes
were said to have further improved reliability and boost power.
Press liked the new styling, the dealers fell over one another to place
orders for both the 250 and 400cc variants, and the only murmur of
discontent came from those riders who had just bought a new 400T which would
now be obsolete, despite having been launched only nine months earlier And,
almost inevitably, the new model cost £80 more than the twin it replaced.
What does the extra cash buy you
assuming that the Dream would have held its £869 price tag until now? The
most obvious difference is the new styling, which certainly loses the bulky
appearance of the first model and adds a touch of the 'hungry greyhound'
appeal of the CBX This is achieved by waisting the fuel tank where it meets
the dualseat, and • ending the tank into the snap-on plastic sidepanels,
which in turn merge with the matching seat base and tailpiece. This clever
design work gives the tank and seat combination an integrated look that is
far removed from the bulbous lines of the Dream.
The slimmer, racier appearance
is reinforced by the rakish tilt of the seat unit towards the rear,
accentuated by pmstriping. The whole ensemble is set off by some very
striking paintwork in silver, red, or a rather ..garish blue, with the Honda
emblem emblazoned in large white letters on a broad blue stripe that deepens
its shade as it moves from the front of the tank to the rear. It is
certainly a machine that stands out in a crowd' m fact, when I first saw the
silver-version it struck me as one of the most beautiful middleweights ever
to grace British roads. The blue paint scheme on our test machine tended to
detract, in my opinion, from the machine's inherent good looks.
Additional .styling alterations
give the new twin a narrower but deeper seat, a new integrated instrument
pod, a CBX-style filler cap to replace the awful flap tacked onto the older
model, new switehgear, rear-set footrests, and a double-disc front brake.
The indicators are now rectangular and their stems covered by soft plastic
The engine and its ancillaries
have also come in for their fair share of attention, with some 50
modifications claimed by the factory. Honda has altered the valve timing,
modified the carburettor settings to give better breathing, and slotted in a
six-speed gearbox in place of the five ratios employed in the Dream. Longer
silencers are said to reduce noise slightly and produce better top-end
power, and the points are replaced by electronic ignition for a more
reliable spark and virtually no maintenance.
The basic engine formula remains
unaltered, with a very over-square twin-cylinder motor relying on
chain-driven counterweights to balance out most of the vibration inherent in
a four-stroke twin. Honda's three-valve-per-cylinder layout, pioneered on
the Civic car engine, is still retained, and the engine breathes through two
32mm Keihin constant vacuum carburettors to give a claimed 43bhp at 9,500rpm
and 24.5ft-lb of torque 1,500rpm lower down the scale. Straight-cut gears
transmit the power through a 14-plate clutch running in engine oil.
But why take a tried and tested
popular design and revamp it so extensively only nine months after its
introduction? Well, marketing obviously had a lot to do with it. After all,
it is widely believed that the main reason for producing marvels like the
CBX is to encourage people to go out and buy the affordable bikes in the
range — like the 400. It helps if the 400 looks even faintly similar to the
flagship, and the Super Dream fills this criterion more closely than the old
Dream, fine motorcycle though it was.
Nevertheless, there are more
tangible benefits. Take the riding position. It suited me fine on the Dream,
but the 400N has been tailored more than ever before to suit European
tastes. The handlebars are 1.8in lower than before, seat height is down to
31.Sin from 32in, and the footrests are almost four inches further rearward.
This all adds up to a really comfortable riding position that encourages
effortless cruising or bend-swinging. I asked one Dream owner to try the
Super Dream and his immediate reaction was to praise the new layout.
What you gain in limb comfort
you lose through the seat of your pants, since the broad saddle on the Dream
was far more comfortable for long journeys than the deeper but narrower
perch on the 400N. It rates as one of the least comfortable seats I've sat
upon this year, and after fairly short journeys of only 50 miles or so I was
happy to stretch my legs and massage my tender backside.
Comfort was not enhanced either
by vibration on the test model. The rider felt it most through the
handlebars and footrests, and it was at its worst at 70mph. After only 30
miles on one trip at that speed I stopped to find my fingers and toes numb
from the high-frequency shakes. Now this I have to put down to a problem
with our particular test machine, because I recall no such complaint with
either the 250T or 400T, and it is inconceivable that Honda has modified the
bike sufficiently to make it vibrate. Rather, I would imagine that chain
tension on the balancer drive was neglected at the previous service.
The passenger had no such
problems; the pillion position was most comfortable, and vibration
conspicuous only by its absence. Our test bike was obviously a rogue in
other ways as well. Nobody can convince me that Hondas leak oil, but ours
had a weep from the cylinder head/barrel joint that became progressively
worse as the test continued. It was more likely to be a faulty seal at an
oil well than a leaking head gasket. Either way, it is a very odd occurrence
on any Honda and must not be regarded as typical of the breed.
If the riding position
encouraged bend-swinging, the handling and braking virtually forced the
rider to seek out twisty roads. That is not to say the Super Dream did not
like straight roads; it behaved impeccably on them, being extremely stable
for a machine with such a comparatively short wheelbase at 54.7 in. But its
tyres, suspension, and general roadhoiding have been developed to such a
high degree that to ride the main highways was to learn only half the story.
Show the 400 a twisty road and it comes into its own.
Its handling is probably unsurpassed in the 400cc class, even by the
two-stroke Yamaha. The original Dream could be hustled through bends with
amazing elan as we proved at Nogaro, but the new model features detail
improvements to the suspension and running gear while retaining the same
single down-tube frame that uses the engine as a load-bearing member.
The 400N has slightly altered
and uprated front suspension with improved damping and slightly more
movement at 5y2in. The damper rod of the FVQ rear shock absorbers has had
its diameter increased from 9mm to 10mm, and that is the sort of small but
obviously significant change that typifies the Japanese approach to
engineering. The rear shocks have dual-phase damping with varying loads.
Spring pre-load is five-way adjustable, and I found the best results came
with the fourth position.
To make the suspension more
responsive to road irregularities the unsprung weight has been reduced by
changing to all-alloy construction for the Comstar wheels — again a la CBX.
How much of this advantage is lost by fitting a second disc and caliper at
the front end is hard to say, but the net result is superb. Ground clearance
presents no problems on public roads; in fact, a previous tester had worn
away so much of the right-hand footrest that I was unable to ground it no
matter how hard I tried. And the Yokohama tyres take advantage of the
generous clearance by providing first-class grip at all angles of lean on
wet roads or dry. The 3.60 S19 front and 4.10 S18 rear covers have an
abundance of tread climbing up the sidewalls, providing all the traction a
hard rider needs in any circumstances.
Being lighter than some other
400s at a claimed 377lb dry, the Super Dream can be flung into bends with
great ease. Laid right over for a fast corner, you see a badly filled trench
running right across your line where the council workmen have left a 2in
deficit to be made by the bike's suspension. The Honda sweeps over it
without any attempt to move off line, and the rear suspension barely
transmits any feeling of the hazard to the rider. In the same way, the bike
sails over bumps without any bucking, nodding, or weaving. The whole machine
seems finely balanced, and even the handlebars fail to twitch as the bike
copes with the worst excesses of our road menders.
Flicking from side to side
through a series of bends is no problem due to the low weight and the bike's
agility, and one of life's pleasures is picking the Honda up from a
left-hand bend, leaning hard into a right-hander and changing up through the
gearbox. The engine is strong enough to pull a high gear through most bends,
but the top three ratios in the six-speeder are close enough to make their
efficient use a source of real satisfaction. The gearbox itself is smooth
and the ratios fast and easy to select, with no risk of missing a change,
but because of the relatively modest power output of the engine you need to
avail yourself of the 'box' to get the best out of the machine.
Braking is superb at the front
and pretty awful at the rear. The twin front discs have their calipers
behind the fork legs in the current fashion, and the pads are similar to
those fitted to the CX500. One finger is all that is needed to produce
tyre-howling stops, although using four fingers gives more sensitive
control. But the rear drum, although rod-operated, offered no feel
whatsoever on the test bike. Great pressure was needed to achieve any
retardation from the back brake, and there was no telling at what point the
wheel would lock up — which it would do, often unexpectedly. The front discs
deserve to be backed up by an efficient rear drum. Wet braking caused no
The Honda's 395cc short-stroke
engine feels immensely strong and robust, and the test machine would whistle
up to 80 or 85mph at any time and hold that speed indefinitely.
Unfortunately, our particular machine suffered one other sad fault: it would
not pull more than 7,500rpm in sixth gear, even though maximum power is
produced at 9,500rpm and the redline begins at 10,000rpm. Every time I tried
to sneak above this figure the motor would die instantly on both pots, just
as effectively as if I had turned off the ignition or run completely out of
fuel. Trying to exceed 7,500rpm through the gears usually produced the same
effect, or occasionally would just cause a bad misfire on both cylinders.
The most obvious cause was spark
plugs breaking down at high revs, but it seemed unlikely that both would do
so at the same time. Since the otherwise comprehensive toolkit failed to
yield a plug spanner I was unable to investigate further. Another
possibility is that the electronic ignition system was faulty, but this is
unlikely because it performed so well at all other engine speeds. Or perhaps
some strange carburettor malady was to blame. In any event it put paid to
any attempt to find out the true top speed. Honda claims 108 mph, and from
the general feel of the motor at 7,500rpm I believe that a rider trying hard
might achieve about 105mph.
Fuel consumption was remarkably
consistent at 53mpg and a best of 59mpg. About 65 or 70mpg should be well
within reach for the rider who does not ride everywhere at 75mph. The 3.1
gallon fuel tank, which incorporates a 0.77 gallon reserve, should take you
135 miles before it is time to start looking around for a petrol station.
This sort of fuel consumption is* highly creditable considering very little
of my mileage was undertaken in 'town.^or at low speeds.
One of the boons of bikes like
the Super Dream is that they make ideal commuting transport while still
retaining the ability to take in a Continental tour or rally without fuss.
In town traffic the Honda has light and quick steering, a feather-like
clutch action, great braking, and a docile disposition. Yet it has all the
urge it needs to stay ahead of most traffic, excluding riders of larger
motorcycles. Neutral is easy to find at a standstill, although six gears
seems a real overkill when you have to change down five times approaching a
red traffic light. My ankle never became quite convinced that so much
frenzied activity should be necessary.
The switchgear is similar to
that fitted to the CX500 and it all works very well, except that the
indicator switch is easy to overcancel. Roll on self-cancelling indicators,
although it is understood that Honda engineers have yet to be satisfied with
any of the methods they have tried so far. Lighting and instrumentation is
as good as you would expect. The 400 has now sprung a quartz halogen
headlight with 60/55W beams which should take care of the darkest roads, but
our test bike for some reason was fitted with an ordinary light that was of
very little use.
Quality of finish is unlikely to
cause owners any problems, except in two areas. Our bike, although only 1500
miles old on collection, had heavy rusting inside the ends of the attractive
tapered silencers. And while rust had yet to attack the under-belly balance
pipe between the two exhausts, most older Hondas that have faced a salty
winter have rusted up badly in that spot. I believe some dealers offer
rust-proofing on that large balance pod free of charge — it's worth asking.
Otherwise the paint, chrome, and alloy look very durable. Plastic is used
for the rear mudguard, chainguard, and sidepanels.
The dualseat is retained by two
catches and secured by a loop around the helmet lock. Once these are
released the seat lifts right off the machine, revealing the toolkit, access
to the air filter, and a small plastic box under the tailpiece that holds
the owner's manual and very little else. The major electrical components and
the battery live behind the sidepanels. The air filter is a washable
polyurethane foam type, which should cut servicing costs. Being a single
overhead cam engine, tappet adjustment should present few problems (the
whole rocker box comes away with two bolts), while the electronic ignition
removes yet another chore. That leaves just changing the oil and balancing
the carbs as regular service items, and the oil drain plug is readily
accessible. The test bike used a negligible amount of oil during the
The upswept silencers emit a
pleasant burble that sounds good without being offensive, and the silencers
themselves are well clear of the wheel spindle for speedy rear wheel
removal. I had a sudden and unexpected puncture while overtaking a car in
Knightsbridge the evening I was taking the 400 back to Chiswick, but thanks
to the prompt arrival of help in the form of a Honda van I didn't have to
actually change the wheel. It shouldn't present any problems, though.
Mechanical noise on the twin is
very low, and generally it has all the appearances of being very easy to
live with. One annoying trait that seems characteristic of these models is a
high degree of drive-train lash which is compounded by the sudden on/off
action of the CV carbs. The mirrors give a reasonable view of following
traffic, even if the vibration did continually upset the images and
occasionally knock the offside mirror out of adjustment. Again, that sort of
problem should not occur on other The latest 400cc twin from Honda at £949
offers a stylish package that is equally suited to commuting or
touring,.with the added dimension of first-class handling to separate it
from the crowd. If that sort of combination is the result of Honda's efforts
to please the European market, it bodes well for other new models to follow.
The Super Dream has sufficient merit to warrant its introduction as a new
model, and if Honda can leave it be for a few months it must be one of the
great all-rounders of 1979.
Illustrated - December 1978