105.1 was originally the frequency for KKJO-FM in St. Joseph, which is now at the frequency of 105.5. KFME, with its 1980s hits/Hot AC-hybrid format, debuted on June 18, 2001, with "You Get What You Give" by the New Radicals being the first song. The station was re-licensed to Garden City, Missouri. The station had modest results. After Susquehanna assumed ownership, KFME flipped to adult hits, and rebranded as "105.1 Jack FM", on October 7, 2004, at Noon. e105's final song was "Don't Speak" by No Doubt, while Jack FM's first song was "Dancing Queen" by ABBA. KFME would later change call letters to KCJK. Jack FM initially debuted with considerable success. Like other Jack stations, KCJK was mostly jockless and stuck to a computerized playlist, highlighted by segments that include the “No-Request Lunch Hour” and liners chastising drivers who slow down to see accidents in the opposite set of freeway lanes. KCJK and Susquehanna's properties were acquired by Cumulus Media in May 2006. Upon taking over the station, Cumulus added live disc jockeys, a rare move for an adult hits outlet. Most of the station's air talent were let go in 2013, and KCJK returned to being automated and jockless. On June 15, 2016, at 7:30 a.m., after playing a block of "end"-themed songs, KCJK swapped formats with K273BZ/KCMO-FM-HD2, adopting their alternative rock format, and rebranded as "X 105.1." The first song on "X" was "Uprising" by Muse. KCJK will now be in competition with Entercom's KRBZ, who was ranked 6th with a 4.6 in the April 2016Nielsen ratings report for the Kansas City market. The format swap also marks the third time a station in the Kansas City market has used the "X" moniker, the first being KXXR from June 1990 to June 1991, KCCX/KNRX from March 1997 to January 1999. On February 7, 2019, Afentra, formerly of KRBZ, joined KCJK for afternoons. Eight months later, Afentra left the station. On October 10, 2019, at Midnight, after playing "Helena" by My Chemical Romance, KCJK relaunched as 105.1 The X, shifting towards a hybrid format with an active rock-leaning presentation that continues to feature an emphasis on alternative rock content alongside other hard rock hits. The first song after the relaunch was "Plush" by Stone Temple Pilots.
