Ezekiel Omulo, Kennedy Owino, Simon Munala and all scored as KCB secured all three points to leave Vihiga hanging dangerously above the relegation zone, just three points safe.
At the Kenyatta Stadium Sony Sugar recovered from a shock start to win 2-1 against Posta Rangers thanks to goals from Robert Achema and Ambrose Ayoyi.
At Bukhungu, KCB forward Simon Munala gave the host custodian Michael Matasio a troublesome afternoon, swinging a right footed freekick into the right corner that was overruled for a foul in the box and later seeing his long lob hit the top of the net with Matasio off his line.
