Kartabz sparked a rally behind Serge Cortez and Lito Posadas to post a huge 21 points lead, 57-36, at the turn.
Jonfer tried to mount a comeback in the final stretch with the combined offensive attacks by Bert Migraso, Diony Abellar and Erik Gaviola but it was not enough to topple the more aggressive Kartabz.
Cortes and Posadas chalked up 16 markers apiece, while Toto Lawas and Rey Lopez also drew impressive performance adding 14 and 11 points, respectively.
In the other game, KN Ferraren coasted a 115-92 rout over Fravu.
Jun Dela Torre scattered a game-high 41 points to lead Ferraren, while Mon Ceballes and Andy Fuentes joined the fray with a combined 57 points for a 3-3 win loss record.
Eking Pacaña, on the other hand, topscored to lead Fravu with 20 points.
First game
Kartabz (96) - Cortes 16, Posadas 16, Lawas 14, Lopez 11, Honoridez 10, Nabua 9, Gabato 6, Padogdog 6, Egpyt 4, Labra 2 Jonfer (82) - Migraso 19, Abellar 18, Gaviola 13, Ando 8, Lazaga 8, Sotes 6, Petallar 6, Lueterio 4
Second game
Ferraren (115) - Dela Torre 41, Ceballos 36, Fuentes 21, Panique 7, Mosqueda 4, Rabadon 4 Fravu (92) - Pacaña 20, Gallardo 19, Tagapan 19, Iverson 13, Villar 13, Patalinghug 8, Alcoseba 6