A Brief History of the Marque
Société Centrale de Construction Mécaniques
14,16,18 rue de Madrid
The Motobloc company name changed to Riva Sport Industries around 1955, the machines being marketed under that brand thereafter. In the UK 1956 models appeared under the name RSI-Motobloc.
Motobloc of Bordeaux, a famous French automobile manufacturer, ceased production in the early 1930s. The motobloc.org site displays images of the RSI Motobloc mopeds without further comment, and a book by Jean-Luc Fournier on Motobloc autos shows the 1950s scooter prominently.
1952 Standard 44cc 2T
1953 M2S Aubier-Dunne 125 cc
1953 M4GL AMC 125 cc
1954 M4GL AMC 125 cc
1954 M475 AMC 175 cc (RSI)
Motobloc Engine Models include:
nationalmotorcyclemuseum.co.uk has the following entry:
Motobloc Engines 1955 to 1965 Inst. Manual for motorized cycles with Motobloc engine type 50 & gurtner C12 carburetter (sic).
Sources: Cycle Memory et al.
Sun Apr 17 2016
info at drystone-walling.co.uk
Year of manufacture
Motobloc 125 m 2s
Hi, I have recently purchased this motorcycle. Any info regarding its age would be greatly appreciated. Also is this the correct engine for the frame, the front engine plates do not seem to be correct. Thank you.
The engine mounts certainly look dodgy and I cannot imagine any manufacturer using such a configuration.
This page shows a Peugeot 125 which appears to be very similar to the machine in question.
This is a later model:
Le superbe 125cc MOTOBLOC de Patrick
Thank you for your prompt reply, it was very much appreciated.
I can only assume that many of these French bikes shared the same parts through different manufacturers as the cycle parts on my bike are identical to the ones used on the Peugeot bikes, such as the rear light, rack and mud guards etc.
Do you know of a data base or an owners club / organisation that would be able to help me date it so I can register it in the UK.
Many thanks again,
If you have a query about Motobloc Motorcycles, or have some information to add about these classic French machines, please contact us