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Hi, In 1985? wife and I bought Shoguns, mine was the 400 Cr-mo and serial #S3K6363
Frame is Champion #5 "Seamless"
Wheels: Araya 27" 1 1/4" w/o
FD and RD: Shimano Altus LT derailleurs and shifters
Brakes: Shimano Tourney brakes (though I replaced the rear one.
Cranks are Takagi. Stem has "SR" on it
the handlebars have "Road Champion" and "Alps" with some fancy engraving.
I replaced the bottom bracket with a Shimano cartridge one when I stripped the bike to the bearings and rebuilt it.

What year was this actually built?

Hers: Shogun 300 Chromium Molybdenum Double butted
Serial # 4M4M65291
Frame: Tange 900 Cr-mo Double butted tubes
Fork: Tangaloy
Wheels: Araya 27x1 1/4 w/0
FD and RD : Shimano (there is no other info)
Shifters: Shimano Z401
Brakes: Dia-compe
Cranks: Sakae SA

All original except for the tires. Stripped to the bearings and rebuilt.