The 67-year-old coach has stressed that the Bavarians are by no means on top of their game just yet, despite a positive start to the season
Bayern won the German Supercup at the expense of Borussia Dortmund, before getting their Bundesliga season off to a perfect start with two victories.
However, Heynckes is confident there is still more to come from the Bavarians as the year goes on.
"It was important to get out of the blocks well, which you can never guarantee after a major tournament. But obviously we had an unusually long pre-season and you notice that now.
"The team is hungry, they're up for it again and relatively advanced for the time of year, in terms of physical fitness too.
"But we have plenty of areas for improvement, the automatic things, switching from defence to attack. We're in the middle of a process. We're a long way off our limits yet, there's plenty of unused potential."
Bayern resume Bundesliga action on Saturday when they host Mainz.