Clarifications and some modifications are presented by Messrs Roy Otto,
Director Track Racing Commission, and Oriol Puig Bulto, Director of the
International Technical Commission, to three articles of the Technical Rules for
Track Racing, for immediate application:
1. Dirt deflectors (Art. 58.03.11)
The inter-face of the dirt deflector may be altered to allow a correct assembly to a
particular frame construction; however the dirt deflector must retain its normal
function
While the present rule (above) is quite clear, you can only modify (machine) the back
of the casting plate to allow a better fit to the type of frame being used. Furthermore,it
is not allowed to drill holes for cosmetic or lightening purposes; it is also not allowed
to polish off the trade mark or the homologating number. These items are for product
identification.
2. Ignition ‘cut off’ switch (Art. )
New wording (bold):
An ignition cut-out must be fitted either on the front fork triple clamp (i.e. ‘handle
bar plate’), or on the right hand side of the handlebar, as close as practicable to
the throttle.
The ignition cut-out must stop the engine immediately, by the simple action of pulling
a lanyard or a non-elastic string (which must be as short as possible) attached to the
rider´s right wrist.
3. Homologated silencers (Art. 31.03.1).
The exhaust pipe must be fixed to the cylinder head and frame with a minimum of 3
clips (the point of fixture at the cylinder head is considered as one clip). The silencer
must be fixed to the frame with at least one clip.
Additionally, a second flexible coupling must be fitted from the first third of the
silencer to the frame. This second coupling should be a steel cable of at least 3 mm
or strong steel spring.
A simple modification (alteration) to the silencer bracket located on top is
permitted, solely intended for better fitting on the motorcycle
http://www.fim-live.com/fileadmin/alfresco/CTI_Commission_Clarification_for_Track_Racing_rules__CCP_.pdf