Dude, first of all Welcome to X-BHP!!
see, using a 55w bulb in place of 35w is almost the same where the brightness will be the same as 35w, as the coil in ur bike cant generate enough current to power up a 55w one. Secondly, i'm wondering how did a 55w bulb eat ur battery as ur bulb is running on AC and only pass will work in DC in RTR's. If that's right, did u use pass continuously or did u convert ur bikes electricals to DC??? U cannot use avengers coil plates as it fits only in pulsars and not RTR's!!!(correct me in this if i'm wrong) Why dont u save up some money and go for HID's??