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Their engines were sold to a variety of other manufacturers including Legnano and Testi , particularly the 49cc, three speed twostrokes.  In the late 1950’s these were used by some 50cc racers to compete in the races for that new class. Vic Dedden was one such rider.  Bert Fruin built his own motorcycles and used the Demm 3M engine in his racing machines. 
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Click for Bert's Page
The S.p.A. Fratelli Daldi & Matteucci motorcycle factory was at Ufficio Commerciale Moto, Via Pirelli 16/A, Milan, Italy.
A manufacturer of gears, machine tools and measuring instruments, Milan-based DEMM diversified into motorcycle production after WW2, and is best remembered for its fast and stylish mopeds and lightweights. In the 1950s the company held many world speed records in the 'tiddler' classes, and in 1961 one of its twin-cam racers won the Italian 50cc Championship. The company began by making proprietary engines before launching its first complete machine – the Dik Dik moped – in 1956. While most of DEMM's proprietary engines and smaller models were two-strokes, it also built overhead-camshaft four-strokes in capacities of up to 175cc alongside a range of three-wheeled delivery trucks. DEMM's mopeds were widely exported to other parts of Europe and to North America, and sold well despite quirky model names such as 'Smily' and 'Ping-Pong'. Production of DEMM motorcycles ceased in the mid-1980s
A Brief History of the Marque: Made in Italy by Daldie Matteucci Motori 
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Demm Dik Dik named after a small antelope of Africa.
This is the Fruin Dartela (bike in picture above) twostroke DEMM engine with a separate foot change gear box mounted behind the engine crankcase.  This gave the engine a 6 speed capability and was used in conjunction with the twist grip change on the handlebar.  You will notice that Bert fitted a rubber mounted head-steady to minimise vibration.
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The Double Overhead Camshaft 50cc Race Engine and Racing Motorcycles
"The Motorcycle 1961

"While selling two-stroke engines to private owners, DEMM have created a fast piece of four-stroke machinery for its works riders, winning the Italian 1961 championship of the 50cc class. 

It is a double ohc (driven by vertical shaft and bevel gears plus the usual spur gear over the head), with double ignition by battery and coil, a five speed gearbox, primary drive by gears and 16mm carburettor with elastic-mounted float chamber 

"Not satisfied with this model, DEMM are now creating another 50cc racer which at the moment is being kept very secret.Somebody is rumouring the new secret weapon to be a twin.

Of course DEMM will compete again in the Italian events in 1962 and it is likely to 'Go Foreign' if all goes well. At present the single cylinder double overhead cam is considered the principle weapon for the 1962 season by the DEMM racing department".
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You can see in the photographs the twin plug head fed by independent coil;s and the 16mm Dellorto carburetors
Some of these photographs were emiled to us by a reader of our Facebook page.  If someone owns them or knows the history of the bike, we would be grateful if they would contact us with details. 
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The Demm Dik Dik Badge seen on all of the Varients
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1957 Demm Dik-Dik
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A Demm Dik Dik - year ?
A Teeny Tiny Cafe Racer. Based on a DEMM 50cc Dik Dik
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A Gallery of Photographs for the DEMM Double Overhead Camshaft 50cc Racer and Engine.
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Research:
JEEP's Archives
Motorcycle Magazines
On-Line encyclopedias
News Paper Cuttings/ Scrap Books
Submissions from readers by email

We are always looking for contributions to the web page. Please let the webmaster know if you have any information or pictures for them. If we have used a picture that requires permission please contact us.
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More photos of the DEMM DOHC can be seen at Phil Aynsley's page taken at the Morbidelli Museum

http://philaphoto.com/imageLibrary/thumbnails.php?album=255
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The Pope Special
A watery wonder, the Pope Special, was one of the fastest machines in 1962. It was built by the Pope brothers but for some reason did not bring its rider, A. E. Dawson, deserved renown though he put up some excellent performances.
For your Delectation - Sound on Please  
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1960 DEMM 50cc Lusso Sports Special
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The Pope Special was based on a Demm engine of the late 50s early 60s and similar to those previously mentioned. It was raced on many of the UK circuits and was a podium finisher. It also competed in the Isle of Man 50cc TTs with its rider A . E. Dawson.  Due to the fragility of the DEMM the engine was changed through its life to the water-cooled ITOM unit that is now in the bike. The cooling works on the Thermo-Syphon approach as there is no pump fitted to the engine.
The picture shows Alan Dawson waiting in the line-up for the 1963 TT speaking with one of the Pope Brothers, creators of the bike.
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The Bonhams catalogue advised that this DEMM, Lusso Sports Special, ultra-lightweight was converted to racing specification in Italy before being restored by the late Glyn Davies of Tenterden, Kent, who exhibited it at various classic motorcycle shows. However, the engine is stamped 'DEMM G.B. TUNED 50cc', which suggests that the conversion may have been carried out in this country. 
1959 Moto DEMM 50cc classic race

This is a close replica of the DEMM Competizione Speciale produced in the 1950's. Air cooled, two stroke single cylinder, 49cc Capacity, 18mm Dell'orto carburettor fitted with vertical float bowl, 6v electronic ignition. 4 speed gearbox, telescopic front forks, 30mm stanchions. The swinging armis twin shock with springs and dampers at 11" centres. Front wheel - Borrani flanged alloy 200 x 18 x 36 hole. Rear wheel - 185 x 18 DID alloy non flanged 30 hole. Racing tyres. Front brake, single leading shoe drum - ventilated. Rear brake, single leading shoe drum. Exhaust is an expansion chamber with twin tail pipes.
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The 6 speed “Fruin Dartella”

This “Fruin Dartella” bike raced in the Isle Of Man 50cc TT of 1962 and at many other UK circuits. The 49cc 6-speed (converted by Bert) foot change, highly modified DEMM Dick Dick engine also achieved a speed of 89mph. Bert also built 4 cylinder engines using the Demm barrels and heads (see his page)
Bert Fruin also built other Dartela racers and the pictures below show one of the 4 speed versions.  This DEMM engine had the 4 speed gears inside the engine and did not require a supplementary box behind the engine.  The engine steady is mounted behind the barrel instead of fixing to the head. You will also notice the modification to the Case to allow a Rev. counter to be fitted that will operate off the crankshaft.
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Some of the road going two-stroke DEMM models that were often converted to racers.
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1962 DEMM DICK DICK 49cc ITALIAN SPORTS ROADSTER
From Italy this Lovely 1962 Moto DEMM (Milano) Dick Dick 49cc Sports Roadster A very rare girl to see in the Uk. As you can see she's in lovely all round condition having been fully restored in the Silver/ Blue livery.
1971 DEMM 50 Super Sport HF
Engine: 49cc 2 stroke single cylinder, Transmission: 4 Speed foot change, Year: 1971
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Wilier was a company founded by Motocicli Wilier based in Trieste in the sixties, that produced a motorcycle model with a 48 cc engine. It is an Italian brand that from 1961 /62 made small two-stroke motorbikes/ Mopeds that were popular in Italy at the time. Production was ceased in about 1970. It used a badged DEMM two-stroke engine that had proved itself over a number of years and had an improved head and barrel from the earlier 3M model shown in the last two pictures.  The frame was of a Wilier design.
The Wilier 48cc Super Sport 1962
Some of these Super Sports were converted for the track by their owners and used in Italian series racing during the 1960s
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Demm | Classic | Racing | Motorcycles
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