Investec Champions Cup Pool Four
Northampton Saints (14) 50
Tries: Sleightholme 2, Hendy 3, Pollock, Coles, Kemeny Cons: Smith 5
Pretoria Bulls (5) 5
Tries: Jacobs
George Hendy scored a hat-trick as Northampton secured maximum points from their first two European games with an eight-try hammering of the Bulls.
Sleightholme crossed twice and Pollock secured the bonus point try inside an hour as a commanding Northampton side ran riot in the latter period.
The Bulls were within touching distance with the score fourteen-five at the break but a sin-binning to forward Tshakweni in the 53rd minute for a unnecessary trip proved decisive and they did not score a point in the final forty minutes.
England fly-half Smith contributed 10 points from the tee as Northampton went top of Pool Four on points difference from defending champions Bordeaux with both sides on 10 points.
The nature of this win, following a 35-27 victory on the road at Pau previously, means last season's runners-up Saints could not have asked for a better start as they aim to improve on that in this campaign.
Pretoria's number ten Wolhuter failed with an early penalty before the hosts took the lead when Henry Pollock made a break before passing to Ollie Sleightholme who showed his pace to sprint away to the try line.
But an error from Sleightholme allowed the Bulls back into the game as the ball was knocked on in contact, allowing Pretoria winger Stravino Jacobs to hack the ball forward and show electric speed of his own to score after 22 minutes.
Ten minutes later, Saints had their second try as quick hands from Mitchell at the base of a ruck and then Fin Smith put Hendy over to make it fourteen to five at the break.
Saints were on top in possession and territory and were being aided from the opposition fly-half Wolhuter who twice missed touch with clearing penalties to bring the pressure back on the away side.
That told after 48 minutes when Smith was again the architect, darting inside to wrong-foot the onrushing defense before delivering a sweet grubber kick over the line for George Hendy to grab his second try and Northampton's third score.
Pretoria forward Alulutho Tshakweni was then sin-binned for a tripping offense on Iyogun. The prop was adamant he had been responding to a trip just prior by the Saints player but the incident from the Northampton substitute was ruled unintentional when reviewed by the match officials.
Northampton capitalized of having the extra man to secure the try bonus point through Pollock before Alex Coles and Sleightholme crossed as the home team notched three scores in five minutes.
George Hendy completed his triple with twelve minutes left on the clock and Kemeny strolled in for the eighth try of an excellent afternoon for Northampton in the final minute.
The leading pair in the group meet in a rerun of the previous season's final when the tournament returns in the new year as Saints travel to Bordeaux. The Saints then conclude the group phase with a home game against the Scarlets on 18 January.
The Bulls, who have one point from their opening two games, host Bristol in their next outing before an away trip Pau.
Northampton: Furbank; Sleightholme, Hutchinson, Dingwall, Hendy; F Smith, Mitchell; Fischetti, Wright, Davison, Coles, Van der Mescht, Kemeny, Pearson, Pollock
Replacements: R Smith, Iyogun, Kundiona, Munga, Prowse, Graham, James, Thame
Bulls: Williams; Petersen, Gans, Vorster, Jacobs; Wolhuter, Burger; Tshakweni, Van der Merwe, Smith, Wiese, Van Heerden, Coetzee, Ludwig, Louw
Replacements: Else, Sithole, Mchunu, Gumede, Carr, Papier, Johannes, Van Niekerk
Yellow card: Tshakweni (53)
Referee: Hollie Davidson (Sco)
Assistant referees: Rob McDowell (Sco) and Dave Sutherland (Sco)
TMO: Mike Adamson (Sco)