MAIN FRAME LOOP
Main frame loop to be retained as original.
Repositioning of oil/fuel tanks.
Replica frames are accepted.
Later parts may be used internally but must appear to be original externally. No Ceriani or BSA 4-Stud fixing will be allowed,
BSA 2-stud is acceptable
Only British or British replica yokes can be used.
Hubs must be of pre 65 pattern
No Tubeless Rims allowed
ENGINE AND GEARBOX
Engine and gearbox must be original or of the same type manufactured for the appropriate class. No Twin plug heads or Reed Valves will be accepted
Must be of British manufacture and the type originally fitted to engine ie
Amal mkI. concentric allowed Not mk2.
Front and rear brakes must be fitted and working.
Only hub brakes may be used (no disc brakes).
Any linkage for rear brake may be used i.e. rod or cable.
Brake shoes may be fitted with any type or make of lining.