Leading 33-10 at half time,KCB posted a record 74-15 win over hosts Kenya Harlequin to top the Kenya Cup standings after match day 10.
Champions Top Fry Nakuru edged Homeboyz 15-12 while Resolution Impala Saracens stopped Mean Machine 34-8.
Western Bulls maintained their winning ways, beating Blak Blad 31-5 as Pan Africa Strathmore Leos crushed Catholic Monks 116-0.
Total Nondies were awarded a 20-0 walkover after Mombasa to honor their fixture.
Resolution Impala Saracens 34 Mean Machine 8
Homeboyz 12 Top Fry Nakuru 15
Pan Africa Strathmore Leos 116 Catholic Monks 0
Kenya Harlequin 15 KCB 74
Western Bulls 31 Blak Blad 5
Mwamba 22 Kabras Sugar 17
Total Nondies 20 Mombasa 0 * Nondies awarded walkover and 5 points, Mombasa deducted 2 points