Thanks for your reply, Ducked.
I wouldn't have thought it'd bend anything at idle. I'd just burn it off, but if it doesn't stop, I'd suspect a displaced or broken piston ring.
This is what I was worried about. However, the amount of smoke has reduced somewhat - there was a lot at first, especially at idle, but now there is no smoke at idle - there is only smoke if I pull away sharpish.
The bike has an auto-cut off system designed in, where it detects if it is on it's side. You have to turn off the ignition, turn it back on again and wait for it to reset before you can start it again.
A (more plausible?) alternative might involve pooled sump oil getting forced past the rings on one side of a "horizontally descending" piston.
This is actually what I meant - so oil is now being burned off in the chamber and the exhaust gas contains the smoke and stench of burned off oil. It now smells like a 2 stroke machine.
Again, there is .no loss of power. 0-60 is the same, and I'd expect a bit of loss if there were broken rings. I am hoping with all my might here as ring replacement will be expensive.