Mesh going nuts

[lamerehic]

I got my rigs on two characters, that i rigged separetly, in other scenes.
Iimported the rigs and assembled them togeter, (the rider on the motorbike)
but after posing and a few render my bike mesh has gone wild and i cannot recover it.
i tried shift P etc, but it doesnt seems to work.

119694 here is the good render


119695 and here what i get now

am i doing wrong somewhere?

It seems that i have to redo the rig process and posing....

[RebelHill]

dont go doing shift Ps after animation, that records pivot for whatever you have selected. What you wanna do is go back to bind pose, select all bones of the wonky mesh and hit r to rest them.