yeah its easy you need to use bars the same diameter as the originals ,but you do need to drill and tap an m4 hole in the left hand of the new bars to accept the switch gear / grip assembly, but you need to get the new bars in position first and then put the grip/ switch gear assembly in position to suit you as once the bars are drilled they cannot be altered hope that is of help
I am using pro taper bars with a set of risers i got from Renazco Racing, this lets me fit a scotts damper and the bars end up being the same height and position as stock. The stock HP bars are quite tall so be carefull what you fit using the stock risers because it could end up being very low.