What oil is used in a 1986 Honda 700 shadow?

Honda GN4 10w-40w is what came in it originally and that or their new GN4 10w-30 is just fine.

you do need a motorcycle specific oil

JASO MA (high friction applications) certified

-- do not run and oil with moly, friction modifiers, or energy-conserving as they can make you clutch start to slip...

Awesome article here http://www.sportrider.com/tech/146_0308_oil/index.HTML