Purchase a rulebook from the proper association that governs your racing series. The SKUSA rulebook can be downloaded from their site. http://www.superkartsusa.com/rulebook.html
Per SKUSA rules, Stock moto must use a 1999 intake boot (marked with a KZ4-M), a 1999 reed cage (3 windows per side), and reeds are sort of “open”. The use of a Boyesen style dual stage reed is not permitted.