Here's an example of what the main pivot bolt should look like,http://www.pinkbike.com/photo/5180206/
Gringo.

 I bought the bike with that bolt. Can you tell me what is the lenth the OEM main pivot I have two spare but i think they are for the top two pivots. Cheers
edit: mine now has single front chain ring I just assumed the original pivot didn't fit but looking at yours I think it would have been fine.

 The length of the original pivot bolts on the Switch are quite short for a linkage bike,even the main pivot bolt,so the one on yours is probably stronger than an OEM.
But beautiful bike in any case,mines the MKI frame from 04,the pic i linked you was just an
example of what the OEM loox like,i got that pic off the same for sale page as yours m8.
Hope i've helped in someway.
Gringo

 Thanks mate, the bolt works fine I was just curious. Cheers

 2006