Few factors may occurs.....

Brakes sound / noise....
- Worn Brake Pads.. >>> Change new one
- Not good Brakes Pads... >>> Change to a better one
- Disc Rotor Dirty... >>> flush with lots of water when the brake is COLD

Brakes / Steering shakes
- Allignment Problem
- Balancing Problem
- Rims "Bengkok"
- Tyre "Bengkak"