I'm not really sure how the system works on this site regarding manuals. Seems to be mostly adverts for auto stuff, however if you click on the motorcycle icon for your question, all problems/solutions for that bike will come up. Scroll down for the manuals section and just try the links.
Failing that, ebay, secondhand bike retailers and bike wreckers often have them, and cheap.
Clymer and Haynes sell over the counter workshop manuals at larger accessories stores and dealers.
Of course, you could order one from Suzuki, but be prepared for an inflated price.
This site below has free downloads for your model but years 91,92 and 2000 only, at this time.
Goodluck and Cheers.
http://www.yamahaownershandbook.com.au/index.php?BRSR=10