Absolutly, set a schedule of contact -either through the courts or by yourselves but do it. if he doesn't stick to it, that is his problem, but have it in writing what you have agreed.
My DS is now 15, his dad and I split when he was 10months. The first year he saw him quite regularly, but when I moved a bit further away and he started a job, arrangements were not rescheduled. A year later his Dad had seen him once (not that he was asking, but i had made it clear only to contact me via the soliciter so it wasn't 'easy' to communicate) and then I moved away for work, reasoning that as he hadn't seen him other than when his mum had organised that one time, he didn't want to see him. I also had a new partner by that time.
DS asked occasional questions, I answered as honestly as I could without slagging his dad off. In 4 years ExP asked to see him once, and it didn't come to anything.
We moved agan when DS was 8, to within 70miles of where ex stayed. ExP asked to see him once, (now 7 years ago) it came to nothing. In the last 7 years we have increased contact with ex's family and see them every couple of months.
I split with 'new' partner a year ago (12 years and 2 more DC's down the line) ExStepDad wants nothing to do with DS, and as a result DS gone looking for his Dad. They are friends on Facebook, but as far as I can tell actual contact between them is very minimal, and DS feels double rejection all over again.
I really really wish that I had persued ExP more in that second year to get a contact schedule, because even if it had not happened and I suspect it would have fizzled out, I would know I had tried my best, and could perhaps have softened the rejection he is feeling now. As a teen those feelings are so much more intense than they would have been at 3 or 4! Also, if i had written proof of an agreement that ExP had not stuck to, it would be easier to show DS that it is not him that is the problem and unlike-able (as he has told me he feels) but his Dad being consitently unreliable for years - and also not me stopping his dad from seeing him either!
But I didn't because my ex is an arse, and I didn't want to deal with him or have anything to do with him and he was unreliable and never paid maintenance, I thought it was the right thing to do then. Hind sight is a wonderful thing.