[dev issue] Dysfunctional kart's export

Yop !
I try to test a kart that i'm working on. A kart for an existing character.
I use a checker map as texture, because i didn't created any for the moment and i think to have seen a few months ago samuncle saying that blender's materials aren't supported anymore.
Unfortunately, only white wheels appear ingame.
At export i only obtain that message
[('WARNING', 'Warning - 1 nitro emitter specified. Only 2 are allowed'), ('INFO', 'Export completed on 2016-03-01 19:03')]
I've tried removing armature modifier and ignore the armature at export, nothing changed.
I've updated blender's plugins. I'm still working with Blender 2.71.
Moreover, i've found a b3dz file in some karts folder, but i wonder what is it because my exporter doesn't generate one.
I try to test a kart that i'm working on. A kart for an existing character.
I use a checker map as texture, because i didn't created any for the moment and i think to have seen a few months ago samuncle saying that blender's materials aren't supported anymore.
Unfortunately, only white wheels appear ingame.
At export i only obtain that message
[('WARNING', 'Warning - 1 nitro emitter specified. Only 2 are allowed'), ('INFO', 'Export completed on 2016-03-01 19:03')]
I've tried removing armature modifier and ignore the armature at export, nothing changed.
I've updated blender's plugins. I'm still working with Blender 2.71.
Moreover, i've found a b3dz file in some karts folder, but i wonder what is it because my exporter doesn't generate one.