In the FIM Appendices for World Records, linked from the BUB speed trials site, it says:
"18.01 CATEGORIES, GROUPS, DIVISIONS, TYPES AND CLASSES
‘Categories’ describe the method by which the motorcycle is propelled.
‘Categories’ are further defined by ‘Groups’. ‘Divisions’ define the degree of
streamlining. ‘Types’ are determined by power source and then subdivided
into ‘Classes’. ‘Classes’ are determined by total engine displacement."
Division A is non-streamlined, B is partially streamlined, and C is streamliners.
In the world record listings, however, no distinction is made between divisions A and B, or between types, i.e. blown/unblown, compression ignition or spark ignition.
Is there a secret record book somewhere that has the complete records?
Also, there is a section in the record book for "Special Vehicles (2 wheelers), Group C" which is nowhere defined. What the hell is that?
And is any fuel legal for any FIM record?