Originally Posted by
mixteup
I'm thinking that my above post was a bit flippant, and not helpful - But I think you can make that into a nice bike, with just a little work.
IMO, buying a bike like this is an opportunity to learn, and become your own bike mechanic.
Pick up a copy of Lennard Zinn's "Zinn and the Art of Mountain Bike Maintenance".
Numerous editions of it - Pick one that covers the era of your Nishiki.
It will talk you through every tool and procedure needed to refurbish that bike.
This book is essential for Mountain Bike owners, who wish to learn how to repair and maintain their own bikes. I borrowed a library copy, found it so essential, that I hunted down a era specific edition. It explains so much very well, and in a easily understood format. Best wishes on getting the Nishiki in top order, and enjoying many more years and miles of nice rides, this is always a joy.