Brakes vibrating under heavy load

[Rodney007]

hey guys, maybe repost...

when hitting the front brakes heavy (very heavy)
i can feel a slight vibration (dig dig dig dig)

this doesnt happen under 100kms, nearly everyone i spoken to at the track about was having similar problems...

is there anything that springs to mind that it could be? or anything i should look for? the steering head seems to have no play, and the pads have plenty of "meat" left in them..

bike= cbr600rr '04

[Tony.OK]

Discs slightly warped? How much travel are ya using in your forks? They may be bottoming out.

[Rodney007]

yes they are!. thanks alot il give that ago!