Query Approved.

BLow dry and rub the disc pads with sand paper and put them back IF they are still not worn out.

If they are worn out,just replace them.

i also had the same prob wid my uni a few months ago..cudn't find out why..bt then they again became normal after 2-3 days..it might be due to temporary loss of pressure in the brake oil of the discs if everything else seems to be fine,i.e, if the oil is filled to the level and the pads are clean..pump the brake lever gently while riding so that the pressure might again build up..i hope u will notice sum change..if not, then take her to the 'hospital'...

chck on 3 things and all three can be done w/o any tolls or the need to take apart anything.
1. Pad- all disc pads have a notch in the center of the pad. Peer down the fork and u will eb able to c the notch. The notch dsnt run down the full depth of the pad and dissapeares at a depth which indicates that the pad needs replcement. Similar to the tread wear indicator on the tyre.
2. Oil- park the bike on levell ground, streighten the handle bars and watch the oil level in the reserve on the right handle bar thru the window. Top up if necessary.
3. Disc- The disc may have got warped and this will result in insuffeint-spongy brake feel. Apply the brake lightly and rotate the frnt wheel, if the pad intermittently grabs the disc then it means the disc has to be changed.

To avoid disk problem always grease the foundation of disc caliper. A pro rider always changes the brake fluid four times in a year. The fluid what we use is either DOT3 or DOT 4. Both fluids has got hygroscopic tendency. due to it absorbs the mositure immediatly. For more info about brake fluids u can read on **********.in, I have mentioned most of the info.
secondly As u mentioned about vibration, it's difficult to say something about it. Coz u have not mentioned vib menas what? for example when u apply the brake the lever moves back and forth slowly. If it is like this then u have bend disc. When the disc get bend the pads also moves as per the bend. if you call this is vibration then change the disc. But if the vibration is like faster then u have worn out lever which has got play in between brake yoke and lever face. Replace it.


When the bike is not stopping even after applying front brake that means the oxidation of aluminum is clogging the way or the network of disc brake system. Secondly lack of grease in caliper foundation...But if all things are fine then clean the disc pads with soap n normal water. then dry it and then use fine emery paper to clean the surface. Also clean the main disc with soap water so the oil / carbon / dust stains will be removed. ( do not try to celan disc with kerosene / petrol / diesel. and don't try to rub the disc with emery paper.) Neither use lathe machine to resurface the disc. That can reduce the thickness of disc.

After cleaning the disc pad u might feel less braking so give some time to burn the surface of pads. In some of the cases the pads becomes hard like stones so replacement is advisible.

That's why all Indian disc brake systems are bad. Nissin, Brembo, Magura is best in quality..

@Chinmay Dangre : Thats wat we call a beautifull and perfect Solution for a Problem....

By the way i gave my bike for resolving this solution - but TVS Guys....changed the Fork Oil and they said they have changed the Rubber part between the Brake Lever.....i dont think they changed the Brake Fluid....but still my issue is not yet resolved - there is a scrapping sound appearing at some times in the disc(this not happening everytime)

The Front Fork is producing some sound at few times when i brake in....

The Crispy Bite is not available now and the Disc has become so Softy rather than so Crispy.........

@Chinmay : One after servicing my bike, those guys had even polished my disc with some cutting oil( thats what they call it) and i never realised. I rode the bike for some 10km and I did not brake because it was a sunday( no traffic). At one point, I saw a jeep in front of me and i braked. But to my horror the bike never stopped, not even slowed down. Went straight and BOOM. hit the Jeep from Behind. Lifted my head and saw the letters POLICE on the Jeep.
They excused me ( lucky me).
After that braking became bad. So here's what i did. I scrubbed the whole Main disc with Vim Bar and Scotch brite( thats called IDEA MANI in Tamil). Braking returned to normal. Now please tell me, will using scotch brite also reduce the thickness of the discs in the long run ?

Man, there are some things to be taken into consideration during these kind of painful situtations and using a disc brake:

1. Chek for the Disc pads if worn out. If yes, then they tend to produce a screeching metallic noise which vibrates the entire bike.

2. Check the master Cylinder Oil level, If less, yes it can happen.

3. Check the disc pad for some kind of oil penetration or any kind of solvent that can include chain lube, diesel etc... oil & those solvents can make the disc pads smooth as butter and eventually u will end up in a Crash landing when u brake hard.

4. Finally Check for AirLock in the hose, and if yes, it is really a simple process to pump the extra air out but consumes time like hell!!!

Do check out all these and let us know the status.

Dude,
This thing happened when my bike was 4k km old. I just ecalled it. The Disc was coated with oil only. so i scrubbed it with scotch brite and vim bar.
I have changed 2 disc pads after that..

Ys, man. Oil on disc plate and pads can always lead to a big time trouble!!!

I dont understand how??? I removed all the oil immediately, the same day right? and its more than one year now...

Then, there must a Air-Lock in ur hose!!!