The Fir Park side scored 12 goals and conceded only two in the first three games between the teams last season to take nine points, although Terry Butcher's men won 4-3 in the last meeting of the campaign.
Inverness began this season with a 3-0 home win over St Mirren, followed it up with a 1-0 victory at Dundee United and sit at the top of the table on goal difference over Aberdeen.
However, former Well forward Foran revealed a little trepidation as he looked forward to the visit of the Steelmen.
He said: "It has been a very positive start, four goals and two clean sheets but we are keeping our feet on the ground.
"Motherwell more or less battered us three games out of four last year so they are a tough side to play against.
"They have lost a bit of pace and big Michael Higdon is a big loss for them although they brought in some good replacements.
"We will probably be favourites which we don't mind so we are looking forward to getting three out of three.
"But you have that little worry that they can put four or five past us and Motherwell players will have it as well, that we can do the same to them.
"There are a lot of creative players on show.
"So I think it is a game where you really need your defence to be on top. The main thing is to get the defence on form to keep the goals at bay."
Butcher is trying to forget last season's punishing defeats against his former club but expects a response from Stuart McCall's side following their 3-1 home loss to Aberdeen last week.
He said: "They beat us quite comfortably last season and they have the same format, not the same players, but they certainly have the same style and they will want to cause us as many problems as they did last year.
"We know what to expect but last season is history. Gone. This is what matters, this match is what counts.
"They will want to bounce back from last week's defeat against Aberdeen.
"But their win against Hibs (at the start of the season) is a warning to us because they are very good away from home."