Rks, how can your clutch shudder disappear with change in rims? Unless you are indicating the loss in weight. While you clearly mentioned that it could be a fuel injection problem. Somehow I dont see these two topics relating each other.
Vidyut, I am sure you have read about DFCO on the other thread? Could the jerk be because of fuel being injected after the cut-off duration and hence the judder? I remember priyank putting up some such post from a honda forum. Actually found the link.
http://www.team-bhp.com/forum/440366-post97.html (How to get 15+kmpl from a baleno ? Read on !!!!)
What RPM does this judder appear at? If its while accelerating it could also be because of a dirty fuel filter or fuel pump.