Series rule #32
http://www.lakc.org/downloads/2011%20LA ... 7-2011.pdf

32. Engine Revving: The practice of running engines at high rpm’s for extended periods is not allowed in the pit, pre-grid or grid areas. When in the pre-grid area no running is allowed. We realize that it is sometimes necessary to run engines after maintenance. This will only be permitted at modest RPM levels for limited periods of time. Extended running at RPMs above clutch stall speeds to preheat motors prior to racing is not permitted. Failure to adhere to these revised regulations will result in disqualification. Water cooled engines: The above is true for water cooled motors. They should be warmed up in your pit area. When in grid area the engines may only be run on the ground not on stands. Kid Karts: At events where fuel is supplied, we will allow a minimum amount of low RPM running to ensure the fuel has reached the carburetor. This is only allowed when under the direct supervision of a designated race official.