Can't deny the craftsmanship, but really specifically with regards to the quality and obvious strength of the skeleton itself. If the idea was to make it look like the skeleton was riding the bike, then his ass shouldn't be sticking up in the air like a cat in heat.
Aside from that, it looks like the remains of someone who died right after the doctor said '...please cough', and is obvioulsy designed purely for the show circuit, to be sitting on a turntable surrounded by mirrors, strobe lights, leather skinned women in bikinis sagging to their knees and lots and lots of bandanas.
On the 'doggie style' bike also posted, I really could have done without the last photo, and anyone can slap a poorly painted chunk of fiberglass on a bike.
That's it - done with my nightly rant.