Kenya University is located along Thika Road next to Kahawa Barracks.
The primary option is to board the buses going to Ruiru or Juja. They include Lopha Travelers and Runa Sacco, available at the intersection of Ronald Ngala St and Munyu Rd, just next to Virginia and Nicco buses. Tell the conductor to drop you at Kenyatta University, KU. Inform him or her in advance so that they can take the right exit.
Kenya Mpya, Lothian, and Super Metro buses plying Nairobi-Thika route are secondary options. Again, tell the conductor to drop you at KU in advance.