What's that sticking out of the ground? Is it a Clyno?

Thanks! It's keeping me out of trouble, I think.

Thanks, that would be great! It looks like this 6 stud might be the one.



Pretty similar to the CC one.

That's useful thanks, I'll measure the end of CC crank.

Given that the flywheel *should* be located purely by the clamp force of the six bolts the register is just there for location. Therefore you could possibly get away with using suitable shim stock wrapped around the crank to centre the flywheel rather than trying to turn a very thin walled adaptor.

Thanks for the responses metroman and greencarfritz .

I've made a bit of progress in the last couple of weeks. A Citroen C1 flywheel and clutch came up on ebay at a price I was willing to risk. It's turned out as well as I could have hoped for, I'm really pleased. The C1 bolt centres are not the same but the bolt holes are larger allowing the CC bolts to pass through with no machining required. The flywheel is a nice size on the back of the engine and only the only engineering required atm seems to be a spacer to hold the flywheel away from the bolts on the back of the engine. As luck would have it this came off the pump end of the CC crank.




Fortunately it was fractionally larger diameter than the centre hole on the Citroen flywheel. 





A bit of chopping and turning and we have a spacer and flywheel locator.



As you can see the bolts pass through without interference.



At a later date I will make the spacer from scratch once I've work out what spigot I will need etc etc. I will probably put a peg through the spacer and flywheel as well as a bit of extra security. It also needs a bit more taking off to allow room for the friction plate boss, I did the turning in my lunch break at work so I left it long until I'd tried it on.



Obviously once you have a flywheel you can start thinking about gearboxes. I've been tripping over a Mk1 Spitfire box for a while. I might have found a use for it.



The input shaft will need a bit of machining and the bellhousing would interfere with the coolant pipe.



However I want this area to look like the Clyno engine/mount/bracket



So there will need to be a bit of fabrication going on anyway.

I tried fitting a Morris Minor pressure plate on the C1 flywheel.



The diameter and hole spacing is almost perfect. It would only require each hole to be filled outwards about 1mm to fit.

Opposite hole to the one with the bolt through:



Unfortunately the pressure plate is too deep though, it takes up too much space inside the bellhousing. Looking online the Spitfire one is shallower so at some point I'll get one to play with. The Morris friction plate fits the Spitfire gearbox though. This probably won't happen for a while though as my next goal is to get the engines running and starting off a starter motor.

I bought a cheap used C1 starter off ebay. The backplate off the green engine was better suited to attempting to mount it so I swapped the flywheel over.



Not far off, you can't see it in the photo but you could probably slide a gnats c@ck between the starter and flywheel I think a smidgen more clearance might be better.



Last thing, I pulled the bell housing off the Spifire gearbox, unlike a Land Rover gearbox the bell housing isn't integral to the gearbox workings so aside from messing about with clutch release gubbins there's scope for bolting something custom on the front, but that's big ideas for another day.

This is the link for the Lotus parts,

www.mikebrotherwood.com/Parts.html