KZ2 is a kart racing class using 125 cc water-cooled two-stroke engines equipped with a 6-speed gearbox (about 42 hp). Technical regulations are similar to KZ1 except for the gearbox which must be "hand-operated and exclusively mechanical without a servo system", and the use of medium tires. Both engines and chassis must be approved by the CIK-FIA racing governing commission. It is open to drivers aged 15 and up. Minimum weight is 175 kg with driver.

This class used to be called Intercontinental C (ICC) and was renamed by the CIK-FIA in January 2007.

The class is run in national and continental championships and is popular in Europe and the USA. In the UK the Northan Karting Federation (NKF) run the ABkC British gearbox championships called Super 4. In the UK for 2010, dunlop DCH's are the regulated tyres.

Daniel Bray (born October 12, 1751, died December 5, 1819) was a Captain on General George Washington's staff during the American Revolutionary War. Captain Bray, along with members of the Hunterdon County Militia under his command, collected the boats necessary for General George Washington's crossing of the Delaware River on Christmas night, 1776 prior to the Battle of Trenton.

A large portion of New Jersey Route 29 is named the Daniel Bray Highway in honor of Captain Bray's vital role in this critical phase of the Revolutionary War.

In 1903 Joseph F. Folsom wrote "The Ballad of Daniel Bray", which is printed in "Patriotic Poems of New Jersey" compiled by W. C. Armstrong, and in "Historic Trenton" by Louise Hewitt.