Decisions of the CIK-FIA

New text / Implementation: immediate / Published on 28/08/2008

SPECIFIC PRESCRIPTIONS

26 – Control of KF engine clutches by means of a data logging system carried on board karts and supplied by the CIK-FIA

a. This system must be used during the Events, exclusively for the storing of the data logged. This system must be installed in strict accordance with the mounting instructions given by the CIK-FIA and must work at all times during practice, heats and races.

b. On decision of the Stewards, the Scrutineers can have a data logging system installed on karts.

All competitors are responsible for the installation, in the “Start” Servicing Park, of the data logging system distributed by the CIK-FIA and they must make it function correctly.
Competitors who have not been supplied with a con-trol system will be handed a lead ballast with a weight equivalent to that of the data logging system, and they shall mount it on the chassis (according to the mounting instructions given by the CIK-FIA).
It is the Competitors’ responsibility to ensure that the slip of the clutch does not exceed the maximum authorised threshold (direct drive clutch, 100%, at 6,500 rpm maxi-mum, under all circumstances).

c. At the end of each practice session, heat and/or race, the karts must be available for checking by the Scrutineers in the “Finish” Servicing Park so that they can collect and check the data logging systems, and export the data concerned.

d. This data logging system checks as a minimum:
– the engine speed;
– the speed of the rear wheels.

e. With this data logging system it is possible to analyse as a minimum:
– the engine speed;
– the speed of the rear wheels;
– the ratio between these 2 data.
Once a Scrutineer has exported the data in the “Finish” Servicing Park, he will analyse the data and check that the functioning of the clutch complies with the regulations. Should it be ascertained that the clutch spins beyond the maximum authorised threshold, the Scrutineer will draw up a report for the attention of the Technical Delegate and of the Stewards.

f. The costs connected with the repairing of a data logging system damaged by a Competitor shall be completely borne by the latter.

Article 18
General Regulations for KF4

* Mandatory homologated centrifugal dry clutch with clutch weights, and with starting ring attached to half crankshaft unit (or flywheel):
– external diameter of the clutch weights : 80 mm minimum.
– minimum weight (complete clutch with starter ring and engine sprocket) according to the engine Homologation Form.
* The engine clutch must be triggered at 5,000 rpm maximum and make the kart with the Driver on board move forward; it must be in direct drive (and 100% triggered) at 6,500 rpm maximum under all circumstances.
* An efficient protection (made of aluminium or plastic) covering the centrifugal clutch but leaving free access to the chain or belt must be fitted.

DECISIONS OF THE CIK-FIA