You never did get a answer regarding your question "what is the FIM and National sidecar record" sorry,
The FIM World Record for sidecars at the present time is 208+mph set in 2009 at the BUB, and held by
Fritz Egli from Switzerland...
I believe the AMA National Record for sidecars is held by Craig Anderson at close to 170mph (this was a streamliner outfit)...