Nils Petersen, standing in for injured top scorer Mario
Gomez, put them ahead and Thomas Mueller pounced on a defensive blunder to add
the second.
Earlier, champions Borussia Dortmund slumped to a second
successive league defeat when they conceded two late goals to go down 2-1 at
Hanover 96.
Bayern's run stretches to five Bundesliga games, one
Champions League tie and their two-leg Champions League qualifier against FC
Zurich.
The last goal they conceded, and only one in 10 competitive
games this season, was in their 1-0 defeat at home to Borussia Moenchengladbach
on the opening day of the Bundesliga season on Aug. 7.
They top the table with 15 points from six games, two ahead
of Werder Bremen and Borussia Moenchengladbach with Hoffenheim a further point
back in fourth.
Petersen gave Bayern the lead in the 21st minute, scoring at
the second attempt as he finished off Franck Ribery's run down the left.
Schalke, ninth with nine points, made a strong reply with
Klaas-Jan Huntelaar missing the post by centimeters on two occasions.
However, Bayern took full control after halftime and wrapped
up the game in the 75th minute when Schalke defender Kyriakos Papadopoulos
fluffed a clearance and the ball fell to Mueller, who fired home from six meters.
"This was the our best second half performance of the
season," said Bayern coach Jupp Heynckes.
Dortmund are a modest 11th with seven points after their
defeat.
Beaten 2-1 at home by Hertha Berlin a week ago and missing
suspended midfielder Mario Goetze, Dortmund went ahead when Japanese midfielder
Shinji Kagawa beat two defenders to score from 12 meters just after the hour.
But they fell apart when Tunisian defender Karim Haggui
headed the equalizer from a corner for Hanover in the 87th minute and Ivorian
forward Didier Ya Konan fired the winner from the edge of the penalty area two
minutes later.
Hanover substitute Artur Sobiech was sent off in stoppage
time for an ugly tackle from behind after only seven minutes on the field.
