My buddy was once stopped for a casual check and got an inspection notice for having an aftermarket oversized tank, which was plastic... I can't help but wonder what would be the look at their faces if they see this :-) It looks like the bike is plated too, so I suppose the owner does ride it. Judging by the rear chain adjuster, the frame and the engine I think it might be a 650 enduro, maybe a heavily modded XR650