^nice pick up! Looks like it has a Noleen Shock with pre-load and rebound adjust. The rebound was pretty cool back then. Noleen will still service it for you.
Strange thing about that bike is all the pics of the 857 I can find on the webs have a carbon fiber swing arm like the 957. I wonder if the carbon swing arm was replaced with a 757 swing arm?
Regardless, it is the same suspension design with the pivot in front of the BB on the down tube instead of the behind the bb on the seat tube like the World Cup design had it. I own both and the pivot on the down tube works much better. That is why orange, the heckler, super light and other single pivot, no linkage suspension designs put the pivot there.
Here is a video of a guy ripping on a 957 with some shit tires, a fork that is not set up right, shocks and pivots that probably haven't been serviced in over a decade and some heavy components swapped in.
(The 957 (and every Proflex) had a 71* HA (not 74*) and the 957 weighed in under 25lbs "out of the box". Not sure what is wrong with the linkage fork to cause the bike to have a 74* HA, but that is not right. No mtb ever had a 74*, that's crazy. And those tires are garbage. I seriously can't believe this guy is trying to make any kind of comparison in his videos without swapping out those old, dry, cracked disintegrating tires. You can see the tire loosing traction all over the place. Any bike new or vintage will ride like shit with tires that old and crappy *rant over*) enjoy:
[youtube]https://m.youtube.com/watch?v=APz7mt9jYw4[/youtube]