Unusual rear sprocket

[nehroom]

So having recently purchased this 1974 3c as a project, I was rather amused to see the novel duplex chain and sprocket set up

 

[Paul Marx]

So having recently purchased this 1974 3c as a project, I was rather amused to see the novel duplex chain and spView attachment 105857rocket set up

Did it come from the continent at some time?
Paul

 

[nehroom]

Did it come from the continent at some time?
Paul

As far as I'm aware Paul it was an Italian import

 

[Paul Marx]

As far as I'm aware Paul it was an Italian import

Those double chains and sprockets were a fad in the 70s, notably in France and Italy. Several endurance racers had them when more was better, very much like the triplex primary chains on our big Laverdas. The spaceframe triples had them.
JPX in France, Eric Offenstadt's company made duplex kits with nylon sprockets.

Paul

 

[nehroom]

Those double chains and sprockets were a fad in the 70s, notably in France and Italy. Several endurance racers had them when more was better, very much like the triplex primary chains on our big Laverdas. The spaceframe triples had them.
JPX in France, Eric Offenstadt's company made duplex kits with nylon sprockets.

Paul

It looks kinda of interesting and would definitely be a talking point, but I think if I decide to restore it a conventional chain and sprocket kit would be better.

 

[russo011]

Have to say I sorted a supersprox special (530) + smaller head fixing bolts + lock wire as an alternative to the standard solution