Well now thats just great...turns out the bike isnt even close to being original according to the triple forum bill...sounds more like a junkyard dog sort of bike with a mix of S2 and H1 parts. heres what was said about it on the triple forum...
"thats hardly all your problems, your not gonna restore this are you? Thats a bitsa bike. 72? drum front, 73 gauge pack, 72 seat and tail, wrong lights both, its neat, but its really a pile of S2 or others put together. 72 bar switches, wrong rear fender, looks to be possibly an H1 drum front, as the brake panel looks to be on the right side, not painted and on left as S2 should be. H1 shocks possibly depending on length. Probably an intersting hotrod, that tail is worth probably 200, parted out. stock parts for S2A and up abound. S2 are tougher, but available. check your numbers, see what it was.
oh and one more tip from a veteran cycle hunter. Never leave without everything in your truck that exists. The parts that he cant find? GONE. they never show up. You take whats there, look yourself, and be glad with your property.
Oh and one more thing, there was a S2 tank and side covers that color on ebay a few months ago."