No, if you are just talking atv's there is Yamaha (that you mentioned), Polaris makes a few, Gas Gas, and Dinli that I can think of right off the top of my head, but I am sure some other members can add to this list. These are one's that currently produce 2 strokes, of course there are the oldies, but goodies, Kawaski's and Suzuki's
Are you just gathering info?
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87 Suzuki LT250R :p
FMF Pipe and PowerCore Silencer
Boyesen Reeds
Uni Air Filter
AC Racing Front Bumper
Answer Handle Bars
Scott Grips
Complete new Factory clutch w/ KG ClutchFactory Pro Series fibers/drives/springs
ITP Rims and Maxxis Tires (Rear)
34 mm Keihin Carburetor
You just got passed, so kiss my a**, now you know you should've been runnin' mixed gas