Best option would be to remove the pads and give them a nice soapy wash and the same to the disc. That should help provided the pads themselves have a good amount of life left. Else, wash disc and replace pads.

By the way this reminds me of one of my friends experience. During his school days he used to spend some of his evenings at his uncles workshop where two wheelers were repaired and almost all of them were Chetaks and Vespas etc. Towards the end a day, the uncle asked him to oil a scooter which was done with its servicing and almost ready for delivery. This guy took an oil can and apart from the levers, stand etc, he also pumped some oil into the drums.

The customer came back within minutes of taking the scooter and..... my friend says that the one lesson he learnt that day he would never forget.

Yes, aargee is right. WD40 is a de-greaser!

Rockrz..I can't believe you actually did that. Wiping the disk with Kerosene,or Petrol lightly with a sponge will wipe the grease away from the disc.It is advisable to change the pads since it is safe to do so.Discard the old pad if you value your safety...it is not worth the risk of cleaning and recycling them.

But the WD 40 contains thin oil in it. If you have doubt spray it on any metal surface and you will see a thin oil remaining after the aerosol had evaporated.Best to wipe the disc with a sponge lightly soaked in petrol.Discard the old pad and fit new ones.

No oil; just the chemical just evapurates; I use it for cleaning anything & everthing at home right from a dirt on carb to stain on glass.

Use Pril or Vim liquid that is used to watch utensils. It can de-grease a lot of things, trust me.

In my first service, the so called Authorized Service Centers (Majestic Motors in Bangalore) had applied WAX Polish on both front and rear discs .

After the service, I am pressing the brakes harder and harder but all in vein. I was like wt* happened. Stopped near a petrol pump, took some waste cloth and put petrol on it and wiped the plates and waited for 4-5mins. Then gradually got the bite back. From then haven't faced any issues.

AFAIK there's no way to successfully clean contaminated friction material (brake pad or shoe), even more so if they got generously smeared with grease!

Best is to throw your pads away and get new ones. Brakes are too important to compromise...