under the category of "already did that" there were quite a few motorcycles with rotary engines in them.
1975 Suzuki RE-5
http://www.millville.org/Workshops_f...ls/suzuki.html
Also norton mad quite a few rotary powered bikes, some even twin rotor.
Here is the link to the sight:
http://www.millville.org/Workshops_f...torcycles.html