I dropped from 240 to 186 (at 6ft4 I still feel over 200 though!) and I have been between 186-190 since March. I spent the whole of May off the bike, and then got back on late June, I've stuck at the 188 mark for the past month and just cannot shake it.
In the winter when it gets a bit too foul to ride outdoors I will be doing a lot of interval training in an attempt to get down to 174lbs.