| I suspect that it is an early 851 system.
look at the pic of the spagetti manifold, I've only seen one other that did not have a joint in the front down pipe midway along the pipe section, held together with springs.
mine has seven springs holding all the removable joints together, allthough it's a later 851/888 corsa system.
allso, I cant see any way of attaching headers to cylinder heads, even the race bikes I looked at have the three bolt fixing from cylinder head to header pipes, or I am incorrrect.
I have been told that you can tell what year the system was built for by the lenght of the silencer tubes.
early bikes had shorter section pipes than later bikes.
distance from where the silencer pipe leaves the silencer bottom end, down to the joint on spagetti system.
The 1992 and 1993 systems are completely different from the systems used on the 1993 works bikes and 1994 customer Corsa's. The length of the pipe on the muffler from the inlet to the start of the can is 12" on the 1992 system and is 15 1/4" on the 1993/94 system.
or I could be wrong.
cheers
robin  | 
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