Drain on the battery during start up... hey man , on my 04 , the lights dont turn on till the bike starts , key on or not... and ones the bikes running , the cdi s working , so theres not much need for a drain saver... besides ,. if that was true , it would be the same as starting with your brights on... right?...a friend of mine did the dual set up , h showed me , i havent had the time to do it yet , but i will be doing it ,ive been asked so many times if i knew i had a head light out that i just say "yep thanks"...i ride with my brights unless im in a pack , then ill hit lows so im not blinding anyone..