July 13, 2012

Info Demm & DeltaDemm    made in Italy by Daldi e Matteucci Motori       Demm 1-spd eng

Demm factory

The S.p.A. Fratelli Daldi & Matteucci motorcycle factory was at Ufficio Commerciale Moto, Via Pirelli 16/A, Milan, Italy.

Demm small

1976 Demm Smily Demm 1-spd engine

1976 Demm Smily
Demm 1-spd engine

1978 Demm Scout Demm 1-spd engine

1978 Demm Scout
Demm 1-spd engine






1960 Demm Dick-Dick

1960 Demm Dick-Dick


Daldi e Matteucci Motori (DEMM) began in 1953 in Milan, Italy. Their mostly 49cc two cycle engines were used by other marques, such as Legnano and Testi. In the mid fifties Demm produced a 49cc model called a Dick-Dick. In the late 1950’s UK, Bert Fruin built his own motorcycles and used the Demm 3M engine in his racing machines. The “Fruin Dartella” bikes raced in the Isle Of Man TT and at many other UK circuits. The 49cc 3-speed manual grip shift highly modified Demm Dick Dick engine also achieved a speed record of 89mph, according to Sheldon’s Emu



1958 Demm Dick Dick top

1958 Demm Dick Dick

1958 Demm Dick Dick engine

1958 Demm Dick Dick engine
Dellorto SHA carb is the same as 1970’s

1958 Demm Dick Dick wheels





1958 Demm Dick Dick frame





ZSNInfo Demm Smily colorDemm was first imported and distributed in the US by ZSN (Zelloe, Sgro, & Neiner, Inc. 351 S Raymond Ave, Fullerton CA 92635 USA), from late 1976 to about 1978. The Demm Scout, with stainless fenders, came from an eastern US distributor, somewhere, possibly ZSN east, PO Box 3176 Annapolis MD 21403 USA. There was also a Demm Smily 2, with ape hangar handlebars and a high back solo seat. All of the Demms in California USA are the Smily model, with white gas tank and fenders. Some of those are labeled as “Grycner”. They were distributed by Grycner Leisure Group (aka Grycner Motors Corporation) 301 Tamarisk Rd, Palm Springs, CA 92262 USA. Grycner is also a two or three wheeled Taiwan made moped with a Sachs or Minarelli engine.

Demm Smily Engine

Here is the genuine excellent line drawing exploded view of the Demm one speed automatic moped engine. It is similar to a Minarelli V1. The piston assembly interchanges Minarelli but the individual rings do not. The clutch looks similar. The clutch shoes/weights are the one-piece-molded kind, like Benelli.

Demm start cable









Demm Smily components: Demm 1-speed engine 1.5 hp, Dellorto SHA 14/12 carburetor #52 jet, CEV bullet headlight, CEV round chrome switches, Domino chrome controls, Grimeca hubs and 90mm drum brakes, CEV magneto, CEV or Huret speedometer with LH driver.