E - MotorSport Vision Racing

2011 MCRCB Yearbook
3.10 TITANIUM AND LIGHT ALLOYS
The use of titanium in the construction of the frame, the front forks, the
handlebars, the swinging arm, the swinging arm spindles and the wheel
spindles is forbidden. For wheel spindles, the use of light alloys is also
forbidden. The use of titanium alloy nuts and bolts is allowed.
The FIM tests may be applied.
3.10.1 Fasteners – 125GP
Only the original manufacturer’s fasteners of disc rotas/carriers to wheels are
used in the 125 GP class or fasteners of the same material as the original
ones.
3.11 DEFINITION OF A MAINFRAME OF A SOLO MOTORCYCLE
The structure or structures used to join any steering mechanism at the front
of the machine to the engine/gearbox unit and to all components of the rear
suspension.
3.12 STARTING DEVICES
These are only compulsory if stated in the class specification.
3.13 OPEN TRANSMISSION GUARDS
3.13.1 For all motorcycles, if the primary transmission is exposed, it must be fitted
with a guard as a safety measure. The guard must be conceived in such a
manner that under no circumstances can a rider or the passenger come into
accidental contact with the transmission parts. It must be designed to protect
the rider from injuring his fingers.
3.13.2 A (chain) guard must be fitted in such a way as to prevent trapping between
the lower chain run and the final driven sprocket to the rear wheel.
3.14 EXHAUST PIPES
Exhaust pipes and silencers must fulfil all the requirements concerning noise
control.
3.14.1 Exhaust fumes must be discharged towards the rear but not in a manner as
to raise dust, foul the tyres or brakes.
3.14.2 The extremity of the exhaust pipes on solo motorcycles must not pass the
vertical tangent of the rear tyre, if they keep the exhaust pipe system as
originally homologated.
3.14.3 Catalytic converters must be removed.
3.15 HANDLEBARS
3.15.1 The width of handlebars must not be less than 450mm.
3.15.2 The grips must be attached in such a way that at least the minimum width of
handlebars is reached when measured between the outside ends of the
grips.
3.15.3 Exposed handlebar ends must be plugged with a solid material or rubber
covered.
3.15.4 The minimum angle of rotation of the handlebar on each side of the centre
line or mid position must be 15 degrees for solo motorcycles and sidecars.
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