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Kawasaki ZG 1000 Concours

     

 

Make Model

Kawasaki ZG 1000 Concours

Year

1986

Engine

Liquid cooled, four stroke transverse four cylinder. DOHC, 4 valve per cylinder

Capacity

997
Bore x Stroke 74 x 58 mm
Compression Ratio 10.2:1

Induction

4x Keihin CVK32

Ignition  /  Starting

Electronic  /  electric

Max Power

97 hp @ 7000 rpm

Max Torque

11.0 kg-m @ 5000 rpm

Transmission  /  Drive

6 Speed  /  shaft

Front Suspension

41mm fork with adjustable preload,  140mm wheel travel.

Rear Suspension

UNI-TRAK with adjustable preload, rebound damping and air pressure, 140mm wheel travel.

Front Brakes

2x discs

Rear Brakes

Single disc

Front Tyre

120/70 VR18

Rear Tyre

150/80 VR16

Dry-Weight

270 kg

Fuel Capacity 

28.5 Litres

Standing ¼ Mile  

12.0 sec / 109 mp/h

Top Speed

127.2 mp/h

Do you remember 1986? It was a time before cartridge forks, low-profile radial tires, four-piston brakes and before CAD/CAM and finite element analysis had enabled engineers to pare every last gram from structural components.

It was also a time when Kawasaki ruled the performance segment, as it had almost uninterruptedly since the days of the two-stroke streetbike era. In 1986, the fastest machine ever built was the then-new ZX1000 Ninja, a sensuously beautiful beast capable of 160 mph in stock trim. And a time when sport-touring in the united States was almost unknown—a tiny niche market, dominated by BMW.

Against this backdrop, Kawasaki dropped an unprecedented bomb, a remarkably well thought-out and seriously fast sport-tourer, not merely a gentlemanly grand-tourer. one of its chief selling points was that the company promised not to change the bike for five years (imagine, we thought improvements were coming too fast—back then). This was both an oblique suggestion that the bike would continue in production that long and an open invitation to the after-market to support the new machine (another anachronism).

But, the secret of how this particular machine defied the odds of the marketplace and is still on sale twenty years later (dog years in terms of motorcycle technology) is no great surprise when you spend time with it.

Engine

Based on the aforementioned DoHC, four-valve ZX1000 Ninja motor, Kawasaki was leaving no doubt that they'd gone all out to build a performance machine. The engine tune was largely borrowed from the Eliminator variant, a low slung dragster-inspired machine, with bodacious torque as its calling card. The carbs were downsized from the Ninja's 34mm mixers to 32mm, the stainless steel headpipes (a rarity back then) made 6mm smaller, and a unique set of cams with 15° less duration than the Ninja, but a fraction more lift than the Eliminator's finished the changes. This gave the heavier Concours 12% more torque in the midrange (3000-7000 rpm) than the Ninja.

A counterbalancer at the front of the block allowed the engine to be mounted as a stressed member in a stout double backbone diamond chassis sourced from the previous 900 Ninja. Steel swingarm mounts replaced aluminum, to provide greater support for the weight of luggage.

Today, the basic engine specifications are unchanged, and our latest example put out 2.2 more hp than it did in our last test in 1996. Engine vibration, mentioned as a problem in earlier tests, was not objectionable this time, not that you don't notice it. The engine makes a low growl under way that makes for an enjoyable soundtrack, and although you can feel it working through the bars, it doesn't qualify as hand-numbing. However, after speaking to a number of owners, we suspect individual models may have slightly more or less smoothness than our test bike.

A number of the original Concours had cam tensioner problems (reported by 17% on our owner's Survey in 1994). This was cured in 1990 by changing the spring/wedge tensioner design to a ratcheting arrangement to eliminate slipping. Some snatchiness in the original carburetor settings were also reported, but these must also have been fine tuned. Now, especially for those who have become accustomed to the abruptness of fuel injection, the Concours' carburetion is a revelation; smooth, controllable and eminently driveable.

A plus for Do-It-Yourselfers is that the motor's valve clearance is handled by screws and locknuts. Adjustment intervals are reasonably long; every 10,000 miles, and yet the engine's redline is not restricted—good for 10,500 rpm.

Today, you'd have to consider the Con-cours' motor as well-proven and reliable as any on the road.

Transmission

Fitted with a wide-ratio six-speed transmission, the Concours' first gear is relatively short, to enable a heavy load to be accelerated briskly. Top gear is an overdrive, to allow relaxed high-speed cruising. In-between, the ratios are well-spaced so that you usually have more than one choice in corners, depending on your mood. our top-speed testing revealed the machine's aerodynamics prevent more than 127.2 mph, in either fifth or sixth gear.

Shifting action is completely silent, and the lever moves with such well-oiled precision that you wonder if current designs haven't found a way to save weight by eliminating ball bearings somewhere. This is truly a fine transmission.

The clutch, being descended from a hotrod powerplant, has no problems with drag-strip starts and gives very good control feel.

Shaft final drive was considered a necessity for the target market, and although the design is devoid of torque-controlling linkage like a BMW Paralever, it does use a very long driveshaft, like the Yamaha FJR1300, to minimize final drive leverage on the suspension. Kawasaki's patented progressive rear linkage, called uNI-TRAK, is also said to help, and we really couldn't fault the action.

Suspension

originally introduced with air-adjustable suspension on both ends, the front fork was converted to conventional spring preload adjustability in 1994, as overpressurizing caused fork seal leakage problems.

The rear suspension continues to offer both adjustable rebound and air-pressure preload over a range of 14^0 psi. Removing a single screw on the left sidecover will access both the remote adjusters and we found that full preload (#4) and 15 psi of air worked very well for a solo rider and full luggage. Note that air is a progressive spring by nature and such a system, when done well, offers real advantages. Here, it is done well.

Another plus is that zerk fittings are provided on all the rear linkage pivots, so there's no need for disassembly to perform this important task. However, we were dismayed to find that the front fork drain bolts were eliminated in 1990, meaning that the fork legs must be removed and upended to thoroughly change fluid.

Brakes

As was typical many years ago, the Con-cours' original front discs were undersized for its weight—671.5 lbs. wet with unladen bags in our recent weigh-in. In 1990, the discs were upped in size considerably (from 265 to 300mm in diameter), and although the calipers were improved from one to two-piston units all around, today they are behind the state of the art—still single-action designs at both ends. The pad composition is also old-tech and not aggressive enough, giving smooth control in moderate stops, but unable to handle multiple hard stops without overheating. In fact, the pads were smoking after just four maximum braking tests, and the hand effort required had the lever very close to the bar. Even at its maximum reach adjustment, you were in danger of crushing your fingers if you didn't cover the lever with all four.

Handling

The Concours' chassis geometry is arranged for good high-speed stability, with a rake of 28.5° and a trail of 4.84". Because the machine is relatively top heavy, it resists the effects of side winds well, although its high CofG and narrow GT-style handlebars conspire to make for truckish handling at low speeds.

Tires play an important role in overall handling characteristics, and although the standard Dunlop K70 tires are rated as radi-als, they constitute an early shallow cross-ply construction with profiles like bias ply tires and are mounted on relatively narrow rims (3.00" x 18" front and 3.50" x 16" rear in this case). And although tire choices, especially of fronts, in these sizes is getting harder to find, the stock tires work very well, allowing very controllable transitions to steep lean angles with an excellent feedback of the road. But we did find that the tires' old-fashioned circumferential center sipes tracked rain grooves and shaved road surfaces significantly.

Overall, however, the bike is very entertaining to ride on mountain roads, and feels spectacularly steady railing corners at high speeds. Its handling must still rate as excellent for the class.

Styling

Although the shape is now so familiar that it can't help but look somewhat dated, the Concours still looks "right"—sleek enough to be unmistakably a sport-tourer and obviously configured for the long haul, with a seat as attractive as it is comfortable. The way the bike can be visually converted from tourer to sportbike is still a plus; with the saddlebag mounts and rear rack easily hidden away with form-fitting covers.

Riding Impression

"Overwhelmingly favorable" describes the Concours riding impression in two words. Supremely comfortable seating... maybe the best stock seat ever, matched with good wind protection for the rider's hands and torso (and helmet too, if the windshield is correct for the rider's size— very good for a six-footer), plenty of power, entertaining handling and handsome good looks all make for a nice motorcycle.

Instruments/Controls

Our only little gripe was the inability to adjust the rear brake pedal as low as we'd like. But, we did manage to get it down perhaps 10mm into a more level position. Otherwise, the shifter and hand levers are all adjustable, the instrumentation very complete, with dual tripmeters (an innovation at the time), temperature and fuel gauges and a clock. The ergonomics are a nice balance between sport riding and relaxed lux-ury—again, hard to fault.

Attention to Detail

The mirrors are fantastic, perhaps the best we've ever used. The saddlebags hold a lot and are O-ring sealed (a seven-hour ride in the rain didn't wet the contents). And while they remove easily, we never quite mastered the technique of mounting them as quickly in our month with the bike.

Also, the windshield uses a vent above the headlight to flow air up its backside,

which we've found makes a big difference in reducing turbulence.

Note that the side vents, positioned to cool the rider's legs in warm weather, can be swapped side to side to do the reverse in cold riding. But in the standard position, they will scoop rain splash at the legs effectively, too—an unfortunately good test for waterproof boots. In addition, there are two lock-able compartments on either side of the cockpit, which have come in handy as a place to mount radios, etc. Two helmet locks are provided as well. Little things, like accessory electrical leads under the seat, a window on the right sidecover to hold your business card, a grab rail for lifting the bike onto the centerstand, flip up bungee hooks on either side of the taillight, a good tool kit, and even a cable to lock the front wheel; are all thoughtfully included.

Value

Its tooling long ago fully amortized by its long production run, the Concours is an amazing value, and actually has been for a long time. Even in 1991, when it was challenged by the ST1100, Honda's then new sport-tourer was priced $2000 higher. Today, with the Concours priced at $8299 list, you can't touch its capabilities without spending at least $3500 more.

Conclusion

Although we couldn't verify the claimed 7.5-gal. fueltank volume (the bike hitting "reserve" on the gauge after only four gallons), what we got still allowed 200 miles between stops, which is certainly adequate. Plus, the bike's riding comfort meant that just the time needed for a refill was enough of a break to refresh before emptying another tankful. Such long range comfort is a rare commodity, even today.

I was selling Kawasakis the year the Concours arrived on the scene. After only a brief test ride so that I could tell customers about it, I was very impressed, both with the power and the amazing level of detail in its design. But what's even more amazing, is that after all these years, it's still a great machine, as anyone in the Concours Owner's Group could tell you (join COG if you buy one).

Excellent handling is one of my most serious qualifications for a bike purchase, and the Connie gave me great confidence in its twisty road abilities almost immediately. I did find it a bit of a wrestling match at very low speeds, what with the narrow-ish handlebars and high center of gravity, but that can be forgiven because that's really not its mission anyway.

Unusually cold wintery weather swept through southern California during our time with the bike, and after one particular seven hour high-speed jaunt in the rain, I couldn't imagine being more comfortable on anything else.

The Connie is great bike, and a great bargain.

It don't get no respect, just because it wasn't built last year. That's just crazy I tell ya! (Thanks, Rodney) —Dave SSearle

This is the first time I've had a chance to put a lot of quality miles on the Concours, and for a 20-year old motorcycle, I'm impressed. This tells me that when it was first released, it was one heck of an impressive machine. Sure, some of its technology has been eclipsed now, but there are still many things that make it the bike-of-choice for many: A large fuel tank and plenty of range, cushy suspension that smooths out bumps, shaft drive to eliminates all the maintenance needed with a chain, a seat that uses triple-density foam—comfortable for making lots of miles, and wind protection that's first rate.

There are also some things that I didn't appreciate: The distortion in the windscreen was a little bothersome. The front brakes are too weak and the lever pull is way too spongy. The wheel sizes limit tire selections. And finally, the downside to excellent wind protection seems to be the gentle but constant push from behind as it swirls around behind the rider.

I'd certainly consider the Concours if I were in the market for another shaft-drive bike capable of comfortable, long distance touring. Walt Fulton

Two additional items drew gripes: The effort to raise the bike onto the centerstand and the longish sidestand that meant you really need level ground to park it securely. But, in all, our complaints are relatively minor items.

Challengers to the Concours have come and gone and been revised to come again. But the Connie's functional strengths and attention to detail are still extraordinary. It gets the basics right: Comfort second to none, great mirrors, a sweet transmission, a willing motor, rock-solid handling and purposeful style.

Changes like modern 17" wheels and radial tires, four-piston calipers and the option of ABS brakes would probably be enough to keep it around for another decade. Let's hope they do it. A bike this good deserves one more upgrade. P

Source MCN

 

 

 

NOTE: Any correction or more information on these motorcycles will kindly be appreciated, Some country's motorcycle specifications can be different to motorcyclespecs.co.za. Confirm with your motorcycle dealer before ordering any parts or spares. Any objections to articles or photos placed on motorcyclespecs.co.za will be removed upon request.  

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