the very first SID 98 has needle type valves, like you found on the Mag 21
Later ones had a special valve (smaller than current SID valves) and you need an adapter from this to the Schrader.
here's a link to German Ebay, so that you know what I'm talking about
http://www.ebay.de/itm/SKS-FEDERGABEL-A ... 2316a7bc0d
all other vital functions need to be examend when fork is inflated.
You can find some intructions and manuals at the internet.
"My greatest worry is (when I'm dead) my wife will sell my bikes for what I said I paid for it"
any 1996 KONA frameset or full bike