FIA Appendix D - 2016
D2.3.3 Category C: Special Automobiles.
D2.3.3.a These Records may be subdivided according to the
type of engine used (jet, rocket, etc.).
D2.3.3.b The use of moveable aerodynamic devices is
permitted.
Just in case you need them keep to five wheels!
If you lost two wheels an ran to FIM rules, then they state
81.01 General
No part of a motorcycle (with the exception of extreme aerodynamic vehicles, also
known as ‘Streamliners’) may extend beyond the wheels. No airfoils, spoilers or
movable external control surfaces are allowed.
81.19 STREAMLINED (Special Construction Vehicles, or ‘Streamliners’)
No movable external control surfaces are allowed. No airfoils or spoilers are allowed
if not integrated in the basic streamlined form. Only one (1) single rear fixed vertical
fin is allowed