right...
if you take off the airbox remove the battery, the engine mount is the thing you can see underneath where the battery was....
hmm... its basically got a big nut the middle, a bit of rubber under the nut then two smaller bolts at either end of the elliptical metal place....
on mine, the first time, the middle bolt was loose... hence the engine movement....
the second time it wasnt loose but once we got it off, you could see the inside was knackered ie a lot of rubber missing which meant that although it was tight at the top, it could all flex within the mount...
the mount basically seems to attach to the gearbox
unfortunately although i thought about it at the time, i forgot to take my camera each time i went there myself....