What it is:

Kawasaki’s immortal Z1 engine, bored-out, in a variety of tweaked and restyled guises. Early models were slower than the 900s; later examples were faster. Not as desirable as a Z1/900, but benefits from a much improved chassis and brakes. Far, far cheaper too.

Others in its family tree:

Original Z1/900. The MKII Z1000 was slab-sided, pokier and available with chain or shaft drive. Z1-R was the sporty off-shoot. J models were designed for proddie racing, but can be unreliable. Several hideous custom/cruiser variants saw the light of day too.

It’s good because:

Unrivalled pedigree, still commands respect, incredibly strong, excellent parts back-up.

It’s bad because:

Z purists sneer and ask why you didn’t buy a Z1.

Other Alternatives:

Absolutely nothing else has the Big Zed’s reputation, but a Suzuki GS-1000 is actually a better bike

What it is:

Sporty Z1000 with more power, slab-sided styling, bikini fairing and four-into-one exhaust. Never that popular because of its distinctive looks and tiny fuel tank (bigger 3.5 gallon option appeared on later models). Handles little better than a stock Z1000.

Others in its family tree:

Essentially every Z-prefixed four-cylinder Kawasaki. The maddest and baldest of them all was the semi-official turbo­charged Z1-R. Made and sold in the US only, it made a claimed 145bhp, whistled past 150mph with ease and handled like a hinge. Bonkers.

It’s good because:

It looks good – really good – and it’s a Big Z, of course.

It’s bad because:

The front brakes are abysmal (there’s a cable link from brake lever to master cylinder!).

Other Alternatives:

Z1000/1100R Eddie Lawson Replica teas Kawasaki’s subsequent attempt at the same thing. Much better in every department.

What it is:

The original superbike. Smooth, fast and refined, the 750 Four elevated biking to a higher plain. Its arrival in the UK in 1969 signaled the beginning of the end of the old British bike industry.

Others in its family tree:

The 750 spawned a whole family of inline fours: 400, 550, 900 and 1100. There was even a bizarre two-speed auto CB750. Aimed primarily at the US market, it was a poor seller in the UK.

It’s good because:

It turns heads, plus it’s reliable and relatively cheap to buy and run. Spares are easy to come by too.

It’s bad because:

Looks better than it rides (a Z1’s got more oomph) and prices are getting steep.

Other Alternatives:

Honda’s own CB550 is nearly as fast in a straight line, plus it handles and stops far better. Kawasaki Z650 is better at everything and is almost as desirable.

What it is:

Hugely influential bike, named after a Japanese sword. Looks fantastic and handles better than the stock GSX, on which it was based. Not a big seller in the Eighties due to its cutting-edge looks, but now an acknowledged classic. Starting to get expensive.

Others in its family tree:

Mechanically, it was simply a GSX1100. A rarer 1000cc proddie racer with flatslide carbs was also made – and looks identical. Its distinctive Target Design styling is still used on Japan-only 400cc and 250cc replicas. The 550/650/750 Katanas are pale imitations.

It’s good because:

It does 145mph, handles, stops (just), and its styling gets better and better with age.

It’s bad because:

Bodywork and trim parts are very expensive.

Other Alternatives:

None if you want that combination of performance, ability and looks. Nothing else comes close.

What it is:

One of the greatest bikes. Ever. Fastest production bike in the world when launched. Made large capacity and DOHC technology accessible. Staggeringly beautiful too.

Others in its family tree:

First conceived as a 750 - Japan got a 750cc model, the Z2. Only 30 or so Z Is (all black engines) originally made it to the UK: Z1Bs are more common. This is the root of Kawasaki superbike design.

It’s good because:

It’s an original: one of those once-in-a-generation bikes that moves everything on. And it’s still bloody fast today.

It’s bad because:

The chassis and brakes weren’t up to it, even in 1973.

Other Alternatives:

A Z900 or a Z1000 will be cheaper: and better to ride, but the Z1 is a true motorcycling icon, so what you lose in performance and ride quality is more than made up in sheer kudos

What it is?

Honda’s first 16-valve four, developed alongside a 750cc version. Its long-stroke engine has plenty of punch, it handles, and even the brakes and suspension are half decent. Nearly as fast as the CBX-6 too. Later models got twin-piston calipers, rubber engine mounts and a fairing.

Others in its family tree : Developed from the ROB endurance racers. The 900 is sandwiched by the bigger CB1100FICB110OR and smaller CB750F.

It’s good because:

CB900s can be bought very cheap, parts are readily available, and 130mph performance isn’t to be sniffed at.

It’s bad because:

Not the strongest engine around (trouble from the strange twin camchain system and bottom end is not uncommon).

Other Alternatives:

CB750F looks similar and is tougher, if slower. GS-1000 looks better and performs just as well, but has a more dated engine.

What it is:

Sports version of Yamaha’s shaft-driven XS1100 tourer, with svelte all-black looks, revised frame geometry, better suspension, and dinky cockpit fairing. Very comfy, very fast, very heavy indeed.

Others in its family tree:

XS750/850 triples. The XS1100 was the guinea pig for Yamaha’s turbo development prior to the technology making it onto the rather limp XJ650T.

It’s good because:

Its shaft driven, the engine’s as tough as old boots, and if you want to tour the stock 1100’s larger tank bolts straight on.

It’s bad because:

The handling really isn’t up to the job. And there’s no chrome to polish.

Other alternatives:

Suzuki GS1000/1100G or Kawasaki Z1000G if you want shaft drive, Kawasaki GPz1100B2 if you prefer chain.

What it is:

Careful copy of the Kawasaki Zl engine installed in the best big- bike chassis of the era. Murdered the Z-1000 on road and track. Can be tuned to produce monster power with little loss of longevity.

Others in its family tree:

Developed from the GS750. S model got two-tone paint and dinky BMW-esque cockpit fairing. G model was the hefty shaft- drive tourer. GS850 was only available as shaft drive and is (a bit) lighter and more manageable than the 1000G.

It’s good because:

You’ve got a reasonable chance of coming out of a fast corner on the correct side of the road. Good reliability, too.

It’s bad because:

If you want an air-cooled big-cube Suzuki the GSX1100 is better. The GS’s charging system isn’t up to much either.

Other Alternatives:

GS850G if you want the shaft drive, GSX1100 otherwise.

What it is:

Sleeker styled version of Suzuki’s first big 16-valve plain-bearing four, the GSX1100. Unrivalled combination of power, torque, comfort and handling. An automatic choice for production and drag racers alike because the engine can be tuned and tuned.

Others in its family tree:

The 1100 was also available with small cockpit fairing, full fairing, and in Katana trim as an 1100 and a rare 1000.

It’s good because:

It’s very powerful very strong, was around for ages so parts availability is good, and is easily tuned. Lighter than some, too.

It’s bad because:

The electrics are rubbish. And it’s one of the ugliest things to roll off a production line. Ever.

Other alternatives:

Kawasaki GPz1100, if you throw away its fuel injection system. Buy a Honda CB1.100R if you want something for the track.

What it is:

The last incarnation of the old Zl-derived engine. Hugely fast and, well, just huge. One of the earliest fuel-injected Japanese bikes. The pinnacle of big air-cooled sports bike design.

Others in its family tree:

Its roots trace back to the Zl. Original B1 model was un-faired. B2 got more torque and a cockpit fairing. The ZX model got a frame-mounted fairing, mono-shock, Star Wars styling and more power.

It’s good because:

150mph performance has never looked so cheap.

It’s bad because:

Fuel-injection gets temperamental with age (carb conversions are common). And the GPz900R is so much better.

Other alternatives:

Suzuki GSX1100EF offers the same combo of bulk and mind- bending power, but is ugly beyond belief. Honda CB1100R proddie racers are more desirable, but more expensive as a result.