A few post back it was noted " This rule was tested by the BUB #7 streamliner....with a hand built one-off engine"
The rule may have been tested if Denis was racing against a AMA record. However, #7 is racing for the FIM World Records ( he holds at the present time) FIM, has to my knowledge,
no engine restrictions as long as the engine meets the displacement.
Some of you U.K., German,and "Down Under"
correct me if I am mistaken, because that means I will have to stop work on my Offy powered sidecar streamliner................Oh, Well......................