ERLA-Norton Commando

Posted on by admin

ERLA-Norton Commando

Radically rebuilt classic

Content of

40 years ago, its builder had his own technical views, and the last owner had quite specific ideas about how to use it. And the current one persistently ran after this radically rebuilt Norton. Westphalia, all three.

Entire generations of sporty drivers viewed the wide, curved Norton feather bed frame as the measure of all things. And then of all things NOTOrton retired him. The reason? The desire for ever higher performance forced the British to ever larger displacements, and while their co-rotating twin in the 600 Dominator still behaved quite well, the 750 Atlas proved to be a real shaker. Its successor, the Commando presented in 1967, should be less annoying to its crew, and that’s why the engine, gearbox and rocker arm were attached to two large plates and everything was stored in lush, vibration-absorbing rubber elements within the completely newly developed main frame. It consisted of a sturdy top tube and two loops that were again wide and clever struts. Very stable, the whole thing, but only if the rubber elements were properly spaced and did not have an inadmissibly high clearance for their recordings. In that case, the construction called Isolastic frame knew quite a few pitfalls.

ERLA-Norton Commando

Radically rebuilt classic

At that time brand new Norton Commando 850

Of race, all of this had got around in this country and as far as Herzfeld in Westphalia, and that’s why the gifted inventor Erich Lawrenz knew what to do with Isolastic when he bought a brand new Commando 850 in the mid-1970s. Paralyzing, so to speak, because the technician, who was socialized as a driver in rail sports and highly valued as a designer, again gave the main frame proper shots in which he could thread the newly made, quadruple ball-bearing axle of a swing arm he had designed. Put an end to the rather narrow storage in the retaining plates on the gearbox. Nevertheless, the engine was allowed to fidget in rubber, now – if you will – with the pivot axis as the pivot.

But this long-term stabilizing measure was not enough for Lawrenz: On the way to the dream motorcycle, the Commando got the half-shell of a Ducati 750 SS, befitting high-shoulder rims from Borrani, new wheel hubs, rear disc brakes instead of drum brakes, machined and perforated brake discs, one made by itself from seamless tube Exhaust system. Take a short breath, then continue in the program: Because – unlike many other British drivers – he wanted to really gas on the autobahn, Lawrenz donated valve guides made of low-friction Caro bronze, installed a specially turned oil cooler and built for the 4.5 Liter of oil supply a new tank that also offers space for the battery. Chain guard, footrests, handlebar stubs, bench with integrated tool compartment and kick starter? Everything self-made. And of course Erich Lawrenz even created the crazy 20-liter tank with his own hands. The man obviously thought that Harro had stopped halfway with the elephant boy and screwed a sheet metal plate onto the flattened top of the fuel barrel along with – of course – a tank bag he had designed himself.

ERLA-Norton in MOTORRAD 8/1977

When everything was ready, Lawrenz had had enough. He sold to Karl-Heinz Rappold, a good friend from nearby Lipperode near Lippstadt, who in turn was so enthusiastic about his new acquisition that he entered it under Lawrenz’s name in the MOTORRAD competition "Readers build the greatest motorcycle". After a detailed examination of this proposal, reporter Ilse Reuter and photographer Uli Schwab moved out to Lipperode, in issue 8/1977 they presented the ERLA-Norton. To certain Manfred Rau with his lattice tube-framed Laverda treble hook won the reader competition, but Karl-Heinz Rappold still remained an ERLA fan. Hurried through his military service with the 850, attended races, went back to work, earned good money – and bought a new one in 1979. Because he really loves motorcycles, the fast ERLA-Norton was allowed to stay. There was space, namely in the window of his mother’s former grocery store.

There again, which can hardly be avoided in a well-structured community like Lipperode, Ralf Lietz kept dropping by. On the way to shopping, to training, to work. A late-career motorcycle enthusiast, but still a madman. At the beginning of his passion, NSU Quickly restorations were enough for him, and they also matched his driver’s license. Then a DKW RT 175 snowed into the house, and when it was really pretty in 2012, the one had to be produced. After that, the now 50-year-old converted a BMW R 45 in a stylish manner and refurbished a 125 MV. The Italian came from said Rappold, and her revival, said Lietz, should finally move this stubborn dog to give him the long-awaited ERLA. But didn’t. Oh, Westphalia can be so slow …

But in the end it was friendly, because in view of the abundance in his shop window, Karl-Heinz Rappold finally admitted that he had enough other motorcycles to get afloat for the rest of his life. With the promise to involve the Kreidler specialists, who are known far beyond Lippstadt, from time to time in the restoration, Ralf Lietz was finally able to pick up the Norton in October 2015.

"To Erich, toast coffee."

The engine, Rappold announced convincingly, ran properly until the end. So it wasn’t opened before. On the other hand, it quickly became clear that the ERLA had not enjoyed an orderly shutdown and conservation: The corroded Amal carburettors were completely replaced, the brake cylinders were really tight. Reseal, then new lines – that was the biggest technical work. Thought Lietz when he drove up to the TÜV on December 22nd. Zero problems, which, by the way, is no wonder in view of the extremely well thought-out and meticulous work of Erich Lawrenz. If you don’t trust this motorcycle, you should walk.

Ralf Lietz soon had to do that, because an ERLA is only as strong as its weakest part. On Christmas Eve – one day after the re-registration – the technical officer wanted to give himself the gift of the first exit. But the 40-year-old electrical system couldn’t withstand the startling traffic, and that’s why Lietz didn’t twiddle his thumbs after work in January, as planned, but rather a new wiring harness.

Since spring, the two have been experiencing an increasingly fruitful phase of getting to know each other, and it does not seem to be ruled out that next year it will be checked whether Erich Lawrenz’s work has really led to stable driving behavior even at high speed. Just like Karl-Heinz Rappold conjures up when he cycles over for a coffee and enjoys the new, old shine of the ERLA. His buddy Erich later put two conversions on the wheels, a Yamaha XS 650 that was brought to almost 900 cm³ and the chassis was drastically improved, as well as an NSU Konsul-based single-cylinder in a feather bed (!) Frame. They recently received some attention not in this, but in another journal. “Rightly”, says Ralf Lietz, “but here is the first ERLA.” Karl-Heinz Rappold grins over. "To Erich, cheers for coffee."

Technical data ERLA-Norton Commando

Engine: Air-cooled two-cylinder four-stroke engine, two valves hanging in the head per combustion chamber, actuated via an underlying camshaft, bumpers and rocker arms, two Amal carburettors with K + N air filters, self-made two-in-two exhaust system, dry sump lubrication, 828 cm³, 51 hp at 6,250 rpm

Drive: Primary drive via triple chain, multi-plate dry clutch with disc spring, four-speed gearbox, secondary drive via chain

Landing gear: Double loop frame made of tubular steel, subsequently welded-in swing arm mounts, front standard telescopic fork with self-made fork stabilizer, rear self-made swing arm, front tires 3.25 x 19, rear 3.50 x 19 on Borani high-shoulder rims , Lockheed disc brakes front and rear, wheelbase 1,440 mm, dry weight approx. 180 kg

Related articles

Related articles

Leave a Reply

Your email address will not be published. Required fields are marked *