wheel vibrates when braking?? need advise

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Hello, I have a 95 240 sx se. just replaced the front brakes and rotors cause i thought the rotors were warped. well it turns out they werent. But when im braking at any speed the front left wheel vibrates rediculously. The wheel is on there good. I thought maybe it could be the wheel bearing is bad? But i want to see what all of you guys had for ideas before i go and buy a new wheel bearing. Or if it might be something else? Thanks