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Unclemeaty · 06-06-2011, 10:11 PM

At 35,000 miles I had what seems to be the common vibration fate of the stock 4-pisont sport brake system.

I had the stock rotors turned when the brake shop said they could be, so that saved me a bunch of cash. I used brand new Hawk HPS pads all around, using care and TLC in applying the Hawk included grease to the backs of the pads, shims, and any metal-to-metal touching points, also making sure not to get any of the stuff on the pad itself. With a familiar friend in the garage, we bled all four corners per the factory manual specificaitons (RR / FL, then RL / FR) and added new fluid to the master resevoir after every corner completed. I never let the resevoir level get as low as 'low' always filling it back up to the very top for each corner bled.

The braking vibration has been a thing of the past which was the beast I was initially after.

Now and after about 2000 miles I'm sure the system is fully broken in; the car pulls left under hard braking.

Most of the times I also feel the steering wheel try to pull in the left direction, and under a "panic" braking condition I can just about lock up the front left wheel while the front right has less braking power. The last interesting symptom is measured with my IR temperature gun, where the FL rotor will always run about 25% hotter than the FR. The RR runs 25% hotter than the RL.

This weekend I was having to hammer it down for a lot of turns for mountain roads. When the car hunkered down it often wanted to vear toward the center of the road and became quite the choire and just another thing I had to manage and monitor while driving spiritedly.

So far my only trials have been with re-bleading the FR/RL corners thinking there is some kind of air in the lines. I've now bled the lines 3 times to no avail. My next best guess could be something gone foul with the master, or perhaps a flexible brake line got damaged. I've thought of getting aftermarket SS lines but really dont know if that would help or just exaserbate the issue.

Any clues?

06-06-2011, 10:11 PM	#1 (permalink)
Unclemeaty Base Member Join Date: Aug 2010 Location: Atlanta Posts: 203 Drives: 150cc Scooter Rep Power: 15	Brake job, now brakes pull the car left At 35,000 miles I had what seems to be the common vibration fate of the stock 4-pisont sport brake system. I had the stock rotors turned when the brake shop said they could be, so that saved me a bunch of cash. I used brand new Hawk HPS pads all around, using care and TLC in applying the Hawk included grease to the backs of the pads, shims, and any metal-to-metal touching points, also making sure not to get any of the stuff on the pad itself. With a familiar friend in the garage, we bled all four corners per the factory manual specificaitons (RR / FL, then RL / FR) and added new fluid to the master resevoir after every corner completed. I never let the resevoir level get as low as 'low' always filling it back up to the very top for each corner bled. The braking vibration has been a thing of the past which was the beast I was initially after. Now and after about 2000 miles I'm sure the system is fully broken in; the car pulls left under hard braking. Most of the times I also feel the steering wheel try to pull in the left direction, and under a "panic" braking condition I can just about lock up the front left wheel while the front right has less braking power. The last interesting symptom is measured with my IR temperature gun, where the FL rotor will always run about 25% hotter than the FR. The RR runs 25% hotter than the RL. This weekend I was having to hammer it down for a lot of turns for mountain roads. When the car hunkered down it often wanted to vear toward the center of the road and became quite the choire and just another thing I had to manage and monitor while driving spiritedly. So far my only trials have been with re-bleading the FR/RL corners thinking there is some kind of air in the lines. I've now bled the lines 3 times to no avail. My next best guess could be something gone foul with the master, or perhaps a flexible brake line got damaged. I've thought of getting aftermarket SS lines but really dont know if that would help or just exaserbate the issue. Any clues? Last edited by Unclemeaty; 06-06-2011 at 10:14 PM.