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Kawasaki S3 400SS MKII
Bike review 1974 Ducati 350 Desmo vs Honda's CB360 vs Kawasaki S3 IT WAS TIME to come down to
earth a little. For the past two issues, the bikes in our main Giant Tests
have been 750s or bigger — the Harley and Ducati V-twins in April/May, and
the Dresda Suzy, Read Honda and John Player Norton cafe racers in June/July. Representing an almost extinct breed of motorcycle — the sporting four-stroke single — came Ducati's 350 Desmo. They're an independent band of thinkers at Ducati, make no mistake, for they're unique in producing bikes with desmodromically operated valves, they've had the gumption to press ahead with their big V-twins in a multi-cylinder minded world, and now here they are still messing with big singles. As we've said before, good luck to 'em for keeping much needed diversity in motorcycling. The test bike is actually the
personal mount of Mick Walker, the arch Ducati enthusiast from Wisbech, and
one of a growing number of dealers kind enough to loan machinery to Bike. And finally, we Inter-Citied up
to Nottinghamshire to collect another new one, Kawasaki's S3 400 cc triple,
from Davick Motique, whose sympathetic shoulder we've leaned on many times
before when seeking test bikes. No, they don't send us a case of Scotch
every week, it's just that they hold an enlightened and all-too-rare
attitude towards offering demo bikes to would-be buyers. These are the
'machines they loan to the press, and of the many times they've done so, not
one has been dropped. So that's one in the eye for wary dealers who think
that motorcycling pressmen are just crash-happy speed freaks. CONSIDERING that it comes from the world's number one motorcycle maker, the Honda at first seemed to me like a dismal flop. It's not an exciting machine to look at, in fact its appearance is positively staid and chunky. And initial riding impressions seemed to confirm that it was indeed an all-round uninspiring motorcycle. It was wet when I collected the 360 from Honda's Chiswick HQ, and it stayed that way all the way home, so I wasn't using much throttle. The performance seemed only just adequate, and in fact the whole bike seemed a bit of a bore. But the next day, on dry roads, early impressions began to fade. I realised I'd been making a mistake common to many people when they jump on a Honda — failing to appreciate the immense rev range. In the wet I'd been changing up at five or six thou, but using the remaining 3,000 rpm it's red-lined at 9,200 — transformed the performance. It turned out to be a really quick bike, as the top speed of 101 mph demonstrates only too well. Four-stroke torque made it even quicker off the line than the Kawasaki in acceleration tests, although better top end power made the S3 faster through the standing quarter. You might suspect that Honda
have pulled that old trick of simply boring out an existing model, in this
case the 350, to produce an allegedly "new" machine. Not so. Much original
thinking has gone into the 360, making it a very different bike from its
predecessor. A revised top end simplifies servicing, and means that an entire top end job can be done without lifting the engine from the frame. Servicing intervals themselves — apart from engine oil changes at 1,500 miles — have been trebled over earlier models to 3,000 miles, a car type practice that's long overdue in the bike world. The chain driving the overhead camshaft is now tensioned by a slipper device instead of the roller wheel formerly used, and a tro-choidal oil pump — you know, one of them things with rotors and chambers, sort of like a Wankel engine — replaces the old plunger unit. The gear on the back of the clutch is made by a new process involving powdered metal subjected to heat and pressure. No machining of the teeth is necessary — it's another of those Japanese labour saving tricks that our own industry needs so badly. There's a new all-tubular frame, a longer swinging arm and frame, and a host of little detail improvements that would take a lot of space to describe fully. Examples: the pilot screws on the carbs are fitted with res-trictors to prevent would-be Yoshimuras from buggering up the carburation completely; and the indicator switch is spring-loaded so that for rapid.lane changing or passing you don't have to flick the button all the way over. Just nudge it for the required time, remove thumb and the switch darts back to neutral — neat. The more I rode the Honda, the more I liked it. Oddly enough, some biting comments have been made about the 360 both here and in America, where the old 350 has been Honda's biggest seller for several years. I can't really follow the criticism, as the 360 struck me as a really versatile bike. It's mild-mannered enough to make a good commuter machine, when you need to rush you can get there by using all those revs and gears, it'll hum along at 80 all day on motorways, and you can't complain over a fuel consumption that will rarely fall below 50 mpg. Is the six-speed tranny just a sales gimmick? It's hard to tell if the bike would be as quick with a five-speed box, but certainly there's a use for all six ratios. Top gear, for example, is properly matched to engine power so that you don't have to change down every time you face a gradient or a head breeze. Don't expect, incidentally, to keep reaching the ton just because we, little smartasses that we are, did it through the speed trap. That was set in very favourable conditions with the motor chattering in the red at ten grand, and the rider flat on the tank. The 360's bars are moderately high, and they'll keep you below 90 under most conditions. At the 80 mph at which the Honda cruises so nicely, you've got around 2,000 rpm in hand. One new feature which is
definitely not a gimmick is the front disc brake. It's one of the best
you'll find, because not only is it strong, but it's got that elusive
quality, a measure of "feel" coming through the lever. Combined with good
Bridgestone tyres, the disc helped to give that rare combination, a Japanese
bike on Jap tyres that felt safe in the wet. On reflection, I'm gladder still that I didn't have anything super-quick in the Island, because it avoided any temptation to join in the more lunatic riding that was going on in abundance over there this year — two dead and 30 injured was the Mad Sunday toll, I believe. Living's just too sweet to chuck it away that easily. Because the Honda is an
all-rounder, it has compromises, and that in turn means it has some fairly
serious faults. The word's already going around that the 360 is a vile
handler, and this is one rumour that's correct. On a bumpy road, you'll
begin to feel like Mert Lawwill fighting a Harley with worn shocks round an
ill-prepared flat track. The thing bounces and lurches in ever increasing
arcs until you just have to roll it off. If you really push it, the bike
starts to graunch its carcass when cranked over as the suspension
compresses, and the warning bells really start to buzz in the
self-preservation department of your mind. Just like a British vertical
twin, the Honda's got a 360-degree crank, and just like a British twin, it
vibrates. This probably explains why two or three bolts disappeared during
the test, including one from the rear brake torque arm, which caused a
hectic moment for Mr Haylock when slowing from one of his ton-up runs during
speed tests. He took it coolly though, dismissing it with a simple, "F-----'
thing," before The riding position isn't all it could be, either. While the height and width of the bars is not too extreme, they still make you act like a sail in strong winds, and the foot-rests are located too far forward. So that familiar aching-arm sensation sets in after an hour or so of motorway runnning. The tank capacity brings you in
for fuel every 80 to 100 miles, and as this is a middleweight motorcycle
with a lot of stamina, I think that's just not far enough. One wonders
whether the designers who put so much technological skill into the internals
of modern motorcycles ever ride the goddam things more than ten miles from
the factory gate. If I've got a long run to do, I like to jump on and go,
without stopping every few miles for cups of tea, petrol, wee wees and the
like. The Honda should be able to go at least 150 miles before the tanks
runs onto reserve. Yellow-backed toady I may be, but I didn't feel safe at night at over 60 on ordinary roads. This kind of thing is dangerous, because there's always the occasion when you're hurrying for some special reason, and it's so easy to get tempted into riding faster than your lights will reach. It only needs a broken down unlighted truck to be stuck there, and powee, you've added to the accident statistics. Instead of pussyfootin' around making everybody put their gear levers on the same side, Yank legislators could do some real good by investigating motorcycle lighting. But maybe we shouldn't encourage 'em at all. Much as I liked the 360, I
couldn't help thinking what a fantastic little scorcher it would make with
some of these relatively easy to solve problems sorted out. Flat bars,
better sited footrests, a bigger tank, and, most important, proper handling,
would make a world of difference. You wouldn't really need to spend money on
the excellent engine. Mike Nicks WHEN CURIOUS Europeans first set
foot in far off Eastern lands they came back with weird stories of people
jetting about on magic carpets and the like. Of course, the folks back home
wet themselves laughing and said those intrepid adventurers had been in the
sun too long, or had pickled their skulls with too much rice wine. Although even the ad men would hesitate to claim that the Kawasaki is a product of sorcery, it certainly is spell-binding to skim along just above the ground at the ton and feel like you're riding on air. with only the rushing wind in your ears to tell you you're really moving. The two-stroke triple's
smoothness and effortless speed is uncanny. It's just a pity Kawasaki
haven't come up with some wizardry to turn the oceans into 92 octane juice,
'cause you've got to accept that you're going to be poorer trying to satisfy
the Kawasaki's voracious thirst. It's a great shame because that's the only
fly in the ointment — although it's more like a damn great hornet because a
fuel consumption heavier than a lot of four wheelers is a nasty sting in the
tail of what would otherwise be an almost perfect medium capacity bike. The S3 is an entirely different animal though, because it is developed from the 350 cc S2 which did not display the same fire-breathing traits as the 500. Kawasaki bored the 350 engine out by four thou to make it 400.4 cc and tamed the motor down slightly so that with the extra cubes it still produces around the same power. The result is an even more pleasant and even-tempered power unit. True, there's still not a lot of fire in the motor below 6,000 rpm, but it produces smooth torque down to about 3.000 and it doesn't come onto the power-band with a bang that'll land you on your backside on a wet road. Perhaps I'm a cynic, but I used to believe that the Japanese were incapable of producing a fast bike with handling to match its performance. But thankfully Kawasaki have proved me wrong, because compared with the abysmally low general standard of roadholding of most Jap bikes, the Kawasaki is superb. Judging it by the same exacting criteria that we used for the Ducati shows some flaws in the handling, but then most bikes would never stand up to such critical appraisal. But I never once felt unsafe on the Kawasaki, even though when really scratching it round fast bends the back end begins to wallow. It sticks to the line it's pointed on and there's none of the heart-stopping pogo action we've come to expect from Japanese machinery on bumpy bends. The only time it gets at all
unpleasant is screwing it on in the wet when the back end starts to wriggle,
but that's more than likely due to nasty Japanese rubber. It calls for a
light right hand, so it's just as well the engine isn't so fierce. Until you get used to instantaneous reaction as you grab the throttle, the impromptu wheelies can be exciting. The Kawasaki was the fastest of the three bikes by quite a margin. The standing quarter time of 14.48 sees isn't much slower than some 750s, and top speed was well over the ton at 108.2 mph. It is capable of cruising at 90 quite comfortably, but the Kawasaki is most fun when you're exploiting that incredibly smooth and rapid acceleration and its secure handling along twisting roads. Braking, by an 11 inch disc on
the front, is pretty good, although hard lever pressure is needed. But the
back brake doesn't contribute much, as it lacks power and is insensitive. Bars aren't the neat flat
pattern as fitted to the S2. but they still make a reasonable compromise for
hard travelling. The Kawasaki is a real joy to ride on a long journey
because it's comfortable and vibration free. The only trouble is that
ridiculous fuel consumption. On a good hard 90-plus thrash up the Al the consumption dropped to a sickening 24 mpg. With the present inflated price of petrol it really hurts to pour so much of the precious stuff down the Kawasaki's voracious gullet. With a really steady throttle hand consumption figures approaching 40 mpg can be achieved, but what's the point in buying performance if you don't use it? Not only that, it gets a real
drag having to stop every 60-odd miles to tank up. Fuel capacity is just
three gallons, but with a thirst like that you don't wait until the tank is
almost dry before filling up again. That ludicrously short range is a worry
at nigtjt as open petrol stations get sparse, and it slows the average speed
of a long journey considerably with the frequent stops. The trouble is, that to get efficient scavenging, potent two-strokes gulp in such quantities of gas that a large proportion of it goes straight down the exhaust ports without being ignited. That wastes fuel and pollutes
the atmosphere. In achieving efficient breathing the engine is in fact being
extremely inefficient in terms of converting fuel into energy. Obviously, if
a four-stroke engine like the Ducati's uses less than half the amount of
fuel to produce the same performance, the Kawasaki is wasting the greater
part of the fuel it consumes. The engine, apart from having
the 4 mm larger bore, differs only in slightly revised exhaust port timing
and 2 mm larger carburettors. The basic layout is still the same. The
made-up crankshaft is supported by six main bearings, all ball races, and
the primary drive is taken from the right hand side of the shaft by straight
cut gears. There are styling changes too, of course, with a slightly redesigned tank with different name flash on the side, but Kawasaki have retained that handy tool compartment behind the seat. The new slab-sided finning gives the motor a chunky look, and with the three pipes and dark red paint job with contrasting tank flash, the Kawasaki gets more attention than the other two bikes. Instruments and switchgear have
been tidied up, with speedo, rev counter, warning lights and ignition switch
all incorporated in a neat black console which lets you see what's going on
at a glance. Getting on the bike for the first time is like jumping into an
aeroplane cockpit, with a confusing array of switches and buttons bristling
from the bars. The only problem we found was that the motor needed a good hard thrash for a few miles to clear its throat after a period of slow riding, but the plugs survived the 1200 miles we covered. The lights really let the
Kawasaki down. Headlamp is a feeble 35/35w rating — nothing like a match for
the bike's performance. Indicators, however, are powerful and well placed. As you can see from the specs the Kawasaki is a sophisticated little plot and in keeping with its genteel character, it's the sort of bike that's seen and not heard. Even when the motor is screaming up towards the red the whine from those three pipes is not obtrusive. It's just quietly businesslike. That's what the Kawasaki's all about. It's fast, but innoffensive. It looks pretty and sophisticated, but it really means business. A bike like the S3 has to be ridden hard and furious to justify its existence. And ridden like that the Kawasaki is one of the most exhilarating bikes in any capacity class. If you are willing to pay dearly for that exhilaration, good luck to you. I'VE BEEN seduced. Our
relationship was supposed to be on a purely professional level, but I
couldn't stay coldly impartial in the face of those sensual charms. Ducati's 350 Desmo is the beguiling mistress. It's a bike that does things for me like few of the bikes I've ridden. It's just that it's such a sweet bike to handle. No, I'm not some kink getting up to weird sexual perversions with motorcycles, it's just that some bikes make you feel really good. They have an intangible quality
which gives you a warm feeling in your guts and a heady tingle in your
brain. The Ducati does that for me. Because the Ducati is a very different creation. It's a stroke of individual genius, the brainchild of one very talented man, whereas the Japanese machine is the end product of a corporate think tank which swallows the individual ideas of a whole team of designers and digests them in a computer. The resulting compromise produces a bike reflecting the Oriental mentality that regards the expression of individuality as some sort of social aberration. But I'm not saying one is better than the other, it all depends on what you want. I don't get my kicks from being frightened to death. I prefer to stay in control and that's one reason I like the Ducati. It's the best handling bike I've ever ridden. Single pot four-strokes for some reason aren't reckoned to be groovy these days. They're old fashioned and go blat-blat-blat ... Aah, but it's music to my ears. That rorty sound won't please the fuzz or the noise abatement society, but it sure sounds sweet and healthy. And that pulsating power just surges through your fingertips and into your brain like a drug. The Ducati isn't flash. It looks really nice, but in a classic way with a pretty racing tank, bum-stop seat and clip-ons. I think it's an artistic styling job, but some cynics may say it looks old fashioned. Appearance belies its
performance because it is unobtrusively low, slim and light. In fact it
weighs in at just 294 lbs with a gallon of fuel, and that's one reason why
it feels so nice. With such little weight and bulk you can sling the Ducati
around with abandon. When the Ducati's lined up on a
bend she won't budge a thou from the line you've plotted, bumps or whatever.
That taut precision handling almost makes you think you could let go of the
bars and just leave it all up to the bike. It's a scratcher's delight, because not only does it handle like a dream, but squeezing on that 11-inch front disc (same unit as on the 750 Duke) has almost the same efficiency as hitting a brick wall. With a gearbox that's so sweet you change gear when you needn't just for the hell of it, that all adds up to a permanent adrenalin high. Everything behaves so impeccably that the bike gives an incredible feeling of security, which I greatly appreciated as the Ducati stalked with cat-like agility through the sticky Bank Holiday traffic that oozed along the A66 after a weekend in the Lake District. You've got to admit the Wops are
streets ahead of the Japs when it comes to frames and suspension, but the
Ducati also shows the Orientals aren't the only ones who can be fiendishly
clever at designing engines. And work it does. Although max
revs of 8,000 rpm are recommended for road use, in racing they'll spin to
9,000, which is quite something for a single. In fact the bottom end will
blow before a valve drops, claims Mick Walker. Taking the place of springs are
two extra cams and rockers working the reverse way to the valve opening
rockers. Because the Desmo is intended as a club racer as much as a road bike (all you do is bolt on a bigger carb) the other technical specifications are of a higher standard than you might expect in a roadster, like for example, a piston that is forged rather than cast, so it will stand the pace better. Valve guides and rocker bushes are of phosphor bronze, and the engine is liberally supplied with ball race bearings to keep things spinning nice 'n smooth. There's one each end of the camshaft, and a hefty one each side of the flywheels. There's also a ball outrigger bearing in the drive side casing, and a phosphor bronze bush on the timing side, making four bearings on the crankshaft altogether. Big end is a roller bearing. The single overhead cam is
driven by shaft and bevel gears, and primary drive is by gear also. The
clutch is pretty hefty with seven friction and six steel plates, but it had
a strange habit of slipping after starting the bike first thing in the
morning. That disappeared after the first five miles or so and never caused
any trouble. In fact a series of full bore clutch-slipping starts for the
standing |-mile produced absolutely no signs of distress. The ignition system makes a
great contribution to the motor's easy starting and flexibility. If you use
the old big single procedure — ease it over compression then a mighty swing
— starting is first kick almost every time. And for a hot motor it's
amazingly happy to plonk along at hardly more than tickover with the rider
counting the thuds. It just wouldn't be the same without the clip-ons and rearsets. As I said before, it's the sort of bike that you control with your whole body by a slight shift of weight or a little pressure from your knees instead of hamfisted wrenching on the bars. The crouching stance is essential to the intimate rapport between the bike and rider. The Ducati was the slowest performing of our trio of test bikes but then it is also the smallest, with an actual capacity of 340 cc. So it's giving away 60 cc to the Kawasaki. Top speed of 98 mph is nevertheless perfectly respectable considering the economy of the bike. If you don't mind sacrificing some economy and flexibility a larger carb would give a significant boost to performance. The bike is actually overgeared,
for at 98 mph the tachometer showed 7,300 rpm. Maximum power is said to be
developed at 8,500 rpm. Admittedly Ducati have done something to improve matters by installing a larger 80w generator, but the headlight is a feeble 25 watts that wouldn't excite a glow-worm. A 35-watt bulb is an option — big deal! It should be at least 45 watts. And Ducati are still living in the past by sticking to a six-volt system. The toolkit is just about
adequate for building Meccano models — it doesn't even enable you to adjust
the chain. I expect better than that for more than 600 quid. Anyway, an engine that demands as much care and skill in building as the Desmo could never be mass-produced on the Honda scale. So be resigned to paying a bit extra for that thoroughbred class and console yourself by calculating how soon the low fuel consumption will cancel out that extra capital outlay over the gas-guzzling Kawasaki. By my arithmetic it comes out to less than 3,000 miles! Bill Haylock
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Any corrections or more information on these motorcycles will be kindly appreciated. |