Bonjour Roger and Berny,
Thank you for your answers. About O'rings, I will order new ones, no problem.
About the bolt on the part which has rotated (I do not know its name), I have not seen it, this is why I thought about Loctite. I will look accuratly again, and if you can sher with us a picture of this small bolt, that would be great. Do I need to remove the flywheel ?
That bolt is threaded in from the crank side...You would have to split the cases to access it, which means it has to be disassembled. Did the latch-out mechanism damage the flywheel when it rotated?
Gah, what a bummer. Sorry for your woes. I would say send it to me and I'll fix it, but I think the postage would be exorbitant.