But the Blues boss is hoping the current board will allow him to complete one final deal for Sporting Gijon midfielder Michel even though he concedes he has exceeded his transfer budget.
Yeung is expected to take full control at St Andrews within the next few weeks and bring an end to the David Sullivan-David Gold era after 16 years at the helm.
McLeish has still to hold talks with Yeung over what his visions are for the midlands club, although he insists the takeover is not causing uncertainty amongst his players.
He said: "Have the prospective new owners had any contact about their plans? No.
"Is the takeover affecting the players? I don't think so. We've got a spirit in the dressing room we've cultivated and harnessed over the last season and a half.
"Other people have talked about it but, regardless of what happens at the club, outside influences we can't control. The players have a lot of belief in themselves and I am pleased with their start to the season."
As regards signing Michel, McLeish said: "We are still working on it. I would like to think if that is the current board's last deal, it will be a great deal that they have done.
"We are over budget. I know that they have pushed the boat out, so I thank them for that, and if we could just do this one more deal, then great. I really believe we need it."
Michel would provide an extra creative spark in addition to Barry Ferguson who was the one midfield player able to pick out a quality pass during Saturday's goalless home draw with Stoke.
McLeish said: "We started to pass the ball around well in the second half through Barry Ferguson getting on it and keeping us in possession. We probed away.
"We are still a work in progress. We are trying to get these passing movements going.
"But one thing is for sure, it is night and day in terms of the passing ability of the team this year and the team that was in the Championship during the first few games."
Stoke goalkeeper Thomas Sorensen produced a superb second-half save to deny Birmingham their second home win in the space of 72 hours after the success over Portsmouth.
The Dane kept out a bullet-like header from Blues striker Garry O'Connor at full stretch from a Sebastian Larsson free-kick.
Stoke boss Tony Pulis said: "It was wonderful, a great save. What made it really good for me is that I don't think Thomas had had a save to make up until then.
"It is not as though he had been busy and he showed great concentration levels and produced a great save.
"He has been a good signing, a free transfer. He has done very well for us. He will be chuffed to bits with another clean sheet. He will be delighted.
"The good thing about this club is everyone feels a part of the club and that is very important.
"When you are working at the levels in the Premier League, and coming up against good opposition every week, the important thing is everyone feels part of the club.
"We don't have to tell Thomas how good he is and it's the same with other players. We make them feel at home and look after them."
Pulis is hoping former Manchester City and Sunderland manager Peter Reid will become his number two next week if he can obtain clearance from the Thailand FA, where he is currently head coach.
FA Cup 09/10 Win Outright: Birmingham 66/1