AD's on Experimental A/C

Maybe this topic has been brought up here before, But do
homebuilt/experimental aircraft have to comply with Airworthiness Directives
set forth by the FAA? specifically, I have a lycoming O-290G model engine in
my airplane and since that engine was not designed for aircraft use, I
wonder If I have to comply with AD's on it. Also, other accessories and/or
avionics in my plane are not TSO'd so therefore I guess there would not be
any AD's on those either.

Its all a little confusing to me. Maybe someone can provide a quick answer
that makes it clear.

Thanks.