In the front row Joe Ross replaces the injured James Parkes while Ryan Peacey ousts Tony Roques from the flank.
Kafer keeps faith with his back division and allows them time to gel together.
On the bench Darragh O'Mahony and Ben Russell appear for the first time this season after good work in training.
Wing O'Mahony missed the opening game of the season due to family commitments and has been unable to break back into the side ever since.
Back row man Russell was injured when the season began but recently completed his rehab with a game for Hertfordshire side Tabard last weekend.
Saracens will face former clubman David Flatman who has starred in a Bath's unbeaten Premiership run and Sarries will have their work cut out at the Rec.
"We're trying to be as consistent as we can from a selection point of view and make judgements on form not results," said Kafer.
"While the result didn't go our way last weekend we had some good performances from individuals. We now have a number of players pushing very hard to force their way into the starting XV and Ben (Russell) and Darragh (O'Mahony) have been rewarded for their hard work with a place on the bench.
"We've been spending a lot of time on our defence and set piece work this week after reviewing the Leeds video. We can't afford to give the form team of the premiership the chances we gave to them as they will certainly punish us harder.
"Bath probably have the best functioning set piece in the competition which is reflected in this season's success and we will certainly have our work cut out to compete up front.
"Obviously we play every game to win but realistically we need to take something out of the game and if we get into a similar position as we did last week in the closing minutes we need to hang on to the points on offer.
"The thing that we haven't done well this season is that in three of our games we've scored three tries but haven't managed to close out the game to get the bonus point, we need to be trying to score points in every game."
Saracen: 15 Thomas Castaignede, 14 Richard Haughton, 13 Ben Johnston, 12 Mark Bartholomuesz, 11 Nathan McAvoy, 10 Andy Goode, 9 Patrick Phibbs, 8 Taine Randell, 7 Ryan Peacey, 6 Kris Chesney, 5 Alex Codling, 4 Simon Raiwalui (captain), 3 Emilinao Bergamaschi, 2 Joe Ross, 1 Steven Sparks.Replacement: 16 Andy Kershaw, 17 Johnny Marsters, 18 Ben Skirving, 19 Ben Russell, 20 Dan Kirton, 21 Darragh O'Mahony, 22 Adryan Winnan.
Kick-off: 14.00 (13.00 GMT)