Originally Posted by T-Mar

I have the 1984 spec sheet. The only other variations from 1985 are:

Rims: Araya 20A, 27 x 1"
Hubs: Sakae Royal SR-300, QR, alloy, small flange
Tires, same model but 1" width
Freewheel: same model but 14-16-18-21-24-28T with gold finish
Chain: model not listed but gold finish
Chainstay length: 7mm shorter
Wheelbase: 11.3mm shorter
BB Height: 5.5mm higher
Fork rake: 5mm less
Head and seat tube angles: 0.5 degrees more

Note: 1984 specs list only 23" geometry, but I'd assume slightly more aggressive geometry across the entire size range.