Front wheel wobble
 

Hi folks,

I'm riding a Motobecane century comp and it has about 400 miles on it.
During moderate speed braking(15~20mph), the front wheel wobbles.
It didn't do this when the bike was new.

Any idea as to what might be causing this?

Thanks in advance.

Is the quick-release clamped down tight? If so, your hub's cones may need adjusting.

^That, especially if you can wobble your wheel back and forth while it is stationary. Also check that your rim is true and your brake pads are hitting evenly.

All of the above, and check spoke tension too.

Highly likely that your headset is loose.

Perfect time to visit your Local Bike Shop.