NABI Bus (NABI) is recalling certain model year 2013-2014 40LFW transit buses manufactured October 5, 2012, through March 17, 2014, 2013 35LFW transit buses manufactured October 21, 2013, through January 14, 2014, and 2013 31LFW transit buses manufactured February 10, 2013, through October 19, 2013, and equipped with compressed natural gas (CNG) fuel systems. In the subject vehicles, a bolt on the latch assembly that holds the CNG top covers closed may come into contact with the CNG fuel cylinder.