I would be thinking along the lines of checking to see if the rotors are not warped.
any kind of grease in the braking system, heating up to liquid measure when braking is not to be recommended..
its rather like the lubrication system on early Morgans, oil being pumped out and down the king pin, straight onto the disk brake rotor. Not a good idea, I say this from first hand experience...
even check to see if all the bolts are very tight, a simple one to do. Even the wheel could be slightly loose on its splines?
Tread carefully and stay away from grease on anything associated with the brakes Robbie..
Just take your time.
