SUZUKI GT550J
Steve Cooper rides the thinking man’s two-stroke.
Always the bridesmaid, never the bride”; if you’re into 1970s classics then that phrase may strike a chord with you when run alongside Suzuki’s GT550. For reasons that are as biased as they are inaccurate, the middleweight triple has perpetually lived in the shadow of the Kawasaki H1 both then and now. Back in the day, in the UK at least, some insurance companies ran a capacity break from 351-499ccs which meant, against all logic and common sense, that a GT550 was perceived as more of a risk than a Kawasaki 500 Mach III. Four decades on and the Hamamatsu machine is still perceived as the poor relation, somehow a lesser entity, less charismatic and, ultimately, is perceived as being worth less: all of which is a huge shame and totally unjustified. The two manufacturers were always aiming at different target markets and whatever anyone else might say then or now a direct comparison is about as valid as comparing apples with oranges; different flavours, different uses, different riders. Suzuki’s logic at the time of the bike’s inception was a lot more sensible than it might at first seem. Having delivered a raft of hugely successful singles and twins; triples were the next logical step. However, Kawasaki had got there first in 1968 with its ‘take-your-brain-out, heart-into-your-mouth, bum-clenching’, 500 triple Mach III. Where was the mileage in making an analogue of something already so iconic? Suzuki’s GT750 triple had been launched in 1971 as a genuine Grand Tourer, a two-stroke alternative to Honda’s CB750/4. Even if the contemporary test riders wanted more speed out of the Kettle, most riders were more than happy with its easy-going performance and wide spread of power. So if the top-end of the market was happy with the 750 why not spread the joy around and roll out similarly good natured smaller capacity machines aimed at riders that didn’t necessarily want all-out performance? Quite why the 550 engine was chosen (it’s actually 543 cubic centimetres) is anybody’s guess but it was probably to differentiate the bike from the Kawasaki. Suzuki also needed to distance its new
baby from the rather successful T500 twin. Given the raft of in-house parts Suzuki could have called on it’s tempting to suggest the firm might have been able to utilise, say, T350 pistons and T500 rods. This would have delivered a similarly unique 615cc triple yet it chose to start almost from scratch. The resultant engine proved to be tractable and with a good turn of usable speed and that word, usable, was what the GT550 was all about. Even if performance was not wildly different from the T500 Titan, the experience was substantially dissimilar. The almost liquid power was on hand virtually wherever it was needed, the three pot motor was silky-smooth and for a stroker there was a large amount of accessible torque. Period tests commented positively on the bike’s exploitability, the manner in which it could be hustled through traffic smartly and the way it conducted itself on fast sweeping roads. Then as now it was remarked upon that it was not a direct competitor to Kawasaki’s H1 yet still fulfilled a gap in the market for a flexible, easy to use middleweight. Forty-five years on we now have the opportunity to see just how accurate those early 70s observations were. The first thing you notice about Nick Jeffery’s early GT550 is its presence; standing in the sun the Aztec Gold candy paint sparkles like a period Top of the Pops stage set. Exquisitely counterpointed via the thick black banding and white pin striping it’s hard to argue Suzuki’s stylists were anything other than supremely gifted and the more you look the
more you see. The ends of the airbox blend in with the black of the tank and whether by design or happenstance the tank and side panel badges with their clear candy red lacquer contrast deliciously against the gold paint. Check out the way the side panels flow around the air box and seemingly into the inlet rubbers. There’s more; how about those three shark’s gill louvres above them or the similar detailing on the black chain guard? Oh and how remiss would it be not to mention those massive indicators that incorporate side reflectors? Drink it all in and enjoy it, then raise an eyebrow or two at the anomalies. Yes, obviously the characteristic three-into-four exhaust system has been replaced by a set of Higgspeed expansion chamber. Owner Nick sold the original system and despite loving the sound of the aftermarket system regrets not retaining the OEM units and thus keeping his options open. Next up is the front brake; GT550JS are supposed to run four leading shoe (4LS) front drums yet this example has a disc! Contrary to popular belief not all J models came with drums at both ends. Some were sold with disc front brakes and several authoritative websites have period images of both types of front brake fitted to the GT550J. The rivet spotters will also notice the J model-only gun metal grey engine cases are, in fact, bare alloy. Once again this is a uniquely Suzuki foible; period images and some sales brochures show the Aztec Gold model with naked, unpainted, outer engine cases. In all likelihood what we have in camera is a late J model running parts that will soon be de rigueur on the K model but in all honesty who actually cares? What’s it like to ride? Get your leg over and the bike immediately feels like it’s been designed for comfort. The saddle seems broad and supportive, the bars are medium high but not uncomfortably so, foot pegs are only a little way ahead of the swingarm spindle… yes it all feels rather well thought-out in a gentlemanly way. Instruments are clearly legible and for once the perennial Suzuki bogie of clouded, hazy, plastic clock lenses is blissfully absent. The vacuum tap means no fiddling around with the left hand and for once I have a bar-mounted choke that stays where I set it. A small detail possibly but if you’ve ever battled with a spring-loaded Kawasaki H1 choke you’ll know how disproportionately irksome a self-closing choke is. Turn the key and then press the button; the 550 has an electric foot and of course it works faultlessly every time. What happens next is pure 70s magic. Palls of grey blue smoke chuff wilfully from the spannies and as I give the throttle a self-satisfying tweak, Gary the Lens jumps back in shock. The pipes crackle and bark in the way that only old strokers can. The gearbox shifts without issue and first is easily good for 20mph. With the decent spread of power bestowed by three pots, conservative port timing and expansion chambers to maximise potential there’s little need to dance on the pedal. Below four grand the engine is as smooth as glass, predictable and almost docile but add an extra five hundred to the tacho and it’s off. The power builds inexorably as it blitzes its way to 6500-7000 – when it’s time to hook up another ratio and repeat the exercise. It’s perfectly possible to head onwards to the red zone but in reality there’s no actual need; riding the torque curve and not the BHP trace is hugely rewarding. Anywhere between 6000-7000 grand equates to the 550’s sweet spot but run the bike on a neutral throttle and there’s an underlying tendency for it to hunt. It’s nothing serious and I reckon a dyno-and-jetting session would soon sort it out. For our riding shots I’ve found a suitable farmyard and a local garage where I can safely turn around. The mechanics at the latter come out after a couple of circuits and look on in appreciation so they get a few throttle blippings
by way of a thank you, they seem well pleased. Sadly Gary the Lens isn’t quite so impressed. He’s lying on low grass bank with a farmhouse wall on one side of the road and a barn on the other. Apparently my ride pasts are causing his ears extreme grief and we need to find somewhere less likely to reverberate with the banshee wail… kids of today eh! Moving on I notice just how nimble the bike is for a half litre Grand Tourer. The riding position and bars somehow minimise the bike’s length and it’s deceptively easy to ride faster than you might have planned. The aftermarket Hagons might be a little stiff but I’d rather that than a wallowing tail thanks. Up at the front the gaiter-ed forks do a fair job but are typically 70s in operation. The brakes are also of the period and the front does require a fair amount of effort yet does the job well enough. The cable operated rear anchor offers an abnormally decent level of feel. On balance the bike handles better than I expected. There’s none of the ‘I-could-spityou-into-the-ditch’ Kawasaki H1 feeling about it yet it’s a significantly more spirited ride than say a Honda CB500/4. To a fair degree my ride has been influenced by the Higgspeed pipes which have brought out a feral edge to the Suzuki; this is something I enjoy! Fitment of period three-into-one Piper systems delivers a mellifluous soundtrack but strangles performance savagely. On standard pipes I know the model will be more rounded and civilised but still with an edge. Perhaps Suzuki genuinely went to some lengths to dampen the GT550’S performance so that it couldn’t be compared to the H1… who knows? If I had to pigeonhole the bike I’d pitch it as the thinking man’s period two-stroke multi with a lot of potential. As bog standard it’s streets ahead of contemporary 750s in terms of mass, accessibility and ease of use. With expansion chambers, upgraded brakes/suspension and a little gentle porting I could see the bike making a serious impression on anyone with a penchant for 70s two-strokes. Good, original examples sell from £5000 and upwards; slightly tired-looking but still mechanically sound versions can be had for half that figure: which option you choose and what you do with it is a personal call but whichever way you jump I reckon you wouldn’t be disappointed by one of the most overlooked classic strokers out there.