Issue: Picked up an 02 f4i 17k miles with extremely soft brake lever, squeeks while riding, handle bar vibrates on braking and loses brake pressure.

Diagnosis: First bled the brakes, deff made a great difference, but I noticed that the pedal would keep losing pressuring and I would have to keep pumping the lever to build it back up.

master cylinder leak? rotors warped? uneven wear on brakepads?


Work Done: Replaced brake pads and rotors. Noticed the brake pads had a great amount of life but had uneven wear which was more then likely caused by the warped rotor. Keep in mind it may be very hard to notice the rotor is warped but research the symptoms

Torqued all bolts to factory spec.
-Axle
-Fork pinch bolt
-Rotor bolts
-Brake Caliper bolts

Greased any necessary parts associated with the wheel and applied anti-seize to all the bolts.


Conclusion: Problem fixed. No more vibrations, no more squeaking coming from the front end of the bike. Immediate braking on level 1(weakest brake lever level) No more vibration/pulsating while braking.

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Also changed my oil with Rotella T6 and the bike seems to really really love it.

Oil: Rotella T6 Blue gallon(Walmart) 1 gal enough
Oil Filter: Mobile M108

*If you have been riding your bike for awhile, go through and at least torque bolts to factory spec because some tend to loosen after awhile.

 

Why did you put anti seize on your bolts? Some bolts are supposed to have thread lock on then, which does the opposite. Maybe that's why your bolts come loose....

 

I didn't put anti-seize on all of them. There were a few with thread lock. The pinch bolts being one of them.

The loose bolts that I was referring to was caused by the previous owners. I just recently picked it up