'89 to '91 KDX 200 bottle. It's behind the left-side-panel. You can fab/weld mounts on your sub-frame or run the KDX sub-frame. It bolts rite-on.
btw, don't we run a 'stiffer' radiator cap? I run a 1.1 on my desert scoot and a 1.5 on my trail scoot...I think. The trail bike's down in the Bay Area...
Good Luck,
Manny