need coaster brake adaptor

hello,

i am planning on putting a motor on a beach cruiser but most of the cruisers i am looking at have only coaster brakes. i seem to have read that you cannot put a small motor on a bike with coaster brakes in that the rear sprocket that comes with the motor kits will not fit. how can i adapt my coaster brake bike rear axle to accept a chain? what is available out there and what vendors sell such adaptors? could i simple machine out the hole in the center of the sprocket that comes with the kit to make it work?

thanks for any advice,

dave

thanx for the tips nougat and matthurd. now i am not worrying so much about buyng a bike with coaster brakes and will have a wider selection to choose from.

thanks again,
videomandw