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PostPosted: Thu Dec 06, 2018 12:16 pm 
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Joined: Thu Feb 07, 2013 9:37 am
Posts: 1844
Location: North Norfolk
Using a standard configuration 2CV engine and box, hung in a Pembleton from the top 2 bellhousing bolts, on to the hangers on the lamp bar. I don't see any advantage for you using a register plate. Using bike engines with different bolt centres, a plate allows coupling to a 2CV box. Adding a 6mm plate, as Duncan says, might leave you with clutch problems. An extra linear 6mm along the input shaft would need an additional movement at the cable end of the clutch fork of at least 25mm ( using a BMW, the clutch fork is cropped to clear the BMW sump, but also to allow enough movement of the release bearing to both engage and disengage).

The BMW and Guzzi bike engines used, all have footpeg provision cast in to and through the crankcase. The latest PMC "V"Sport has a modified frame to use this as the main engine mount. IIRC Ade Colmar has emulated this in his self-build chassis, but using a Guzzi motor. The big block Guzzi conversion also uses a register plate, with additional lugs to carry angled shock absorbers attached to the extended front arms.

With your stock engine and gearbox castings, everything fits well together with a clutch system that works, as Andre Citroen intended. Unless you use a different engine, I suspect this is your best bet?

It's a 2CV Jim, but not as we know it.

PostPosted: Thu Dec 06, 2018 2:28 pm 

Joined: Sun Feb 24, 2013 5:56 pm
Posts: 456
When I used to fit 650 visa engines on to 2cv gearboxes the bell housing and engine were spaced 5mm apart this let you keep the dowel tubes
The down side was the clutch actuator arm had to travel further and could be pulled against the gearbox which was not a problem as long as the clutch cable was given more slack than normal ( test by putting pedal down and getting first with out grating) other wise there was a danger of the cable nipple coming off or the round eye pulling through the clutch fork.( which never happened) Ps use a diaphragm clutch as well. So I have to say with 6mm more modification will be needed

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