1978 suzuki gs 1000 plug gap b8es?

Factory Service Manual states: .6mm - .8mm

http://www.aperaceparts.com/COPE.HTML recommends:

"When running a Suzuki or Kawasaki with a Dyna-S and high performance coils set plug gap at .026. When running an MSD or Dyna-4000 Ignition system set plug gap at .018."

Note: .026" = .66mm