Liquid Overflow: Required, minimum 2.0 litres. Supercharging: All motorcycles fitted with Superchargers must have a minimum 3.0 mm (1/8 inch) thick Steel or 5.0 mm (3/16 inch) thick Alloy cover fitted in order to protect the rider in the event of a Supercharger explosion. Approved ballistic blankets are also acceptable. Refer Power Adders. Controls: Handlebars must be a minimum of 609 mm (24inch) and a maximum of 838 mm (33 inch) wide and where telescopic forks are used may not be mounted more than 152 mm (6 inches) fore or aft of the headstock centre line. Minimum handlebar material 22 mm (7/8 inch) diameter, with a wall thickness of .058 inch (1.5 mm) 4130 Steel or 22 mm (7/8 inch) diameter, .089 inch (2.2 mm) wall thickness 7075 T6 Aluminium. All tubular handlebars must be plugged at the ends. Brake and clutch levers must be ball-ended type. Handlebar mounted fuel shut-off required. Dual throttle cables are required and must be arranged so one cable positively closes the throttle or throttles. A lanyard type device must be fitted, and attached to the rider while in operation, activating either the fuel shut-off or ignition kill switch. Rubber or knurled Alloy handlebar grips permitted Frame: The chassis must be constructed from CM4130 Steel tube or equivalent. All joints must be TIG welded.
All reinforcing tubes must be a minimum of 19 mm (3/4 inch), with a minimum wall thickness of .049 inch (1.2 mm). Where a single top frame tube is used, a minimum diameter of 50 mm (2 inches), with a minimum wall thickness of .058 inch (1.5 mm) is required. Minimum wheel base is 2032 mm (80 inches). Any bike using a non-unit motor must use either a full cradle frame or engine plates so that the frame will not be weakened in the event of an engine/ crankcase failure. Streamlining is permitted provided the covering over the front wheel is not lower than 6 inches (152 mm) from the ground. No part of the vehicle may protrude further than 610 mm (24 inches) forward of the front spindle, assessed at 90 degrees from the ground. Footrests may not be located behind the rear most extremity of the machine frame. Ballast: Removable ballast to a maximum of 12.00 kg (26.45 lbs). Chain Guard: Exposed chains must be covered on their top run between the centre lines of the sprockets. Cover must be fastened to the main frame. Minimum material specifications for chain guards: 25 mm (1 inch) by 3.0 mm (1/8 inch) Steel or Alloy. Flywheels: Exposed Flywheels and clutches must be adequately protected from rider contact with material that will not flex or contact clutch unit with a minimum requirement of 5.0 mm (3/16 inch) Alloy.
Main frame rails and cross tubes must be a minimum diameter of 25 mm (1 inch) with a minimum wall thickness of .058 inch (1.5 mm).