The sources of noise can either be very easy or very difficult to track down depending on how consistent the noise is. In general, the best way to identify where noises come from is that if suddenly a noise is present when it was not before, think back on if you changed anything and if that could be the source of the noise. If you just installed a new accessory or loosened any screw on the board, a part can be loose and rattling under the vibration a board goes through. Try to undo what you last did to your board and see if it goes away.
The XR will make a deeper noise when the board is set to Delirium and the Pint will make a similar noise when in Skyline. These noises are normal and are due to the board being asked to exert more power to get you going quicker! You can check to see if this is your issue by changing the shaping mode to a less aggressive option and see if it goes away.
Another common noise that can catch riders off guard is if they have a fender installed, occasionally debris can get caught and rub against the tire. It is always a good idea to remove the fender and check to make sure nothing is stuck.
If you have a maghandle that is installed on your board, accelerating and braking cause the board to vibrate. Since the maghandle is designed to be loose enough to rotate, the vibration can make the maghandle vibrate and make noise. If this bothers you, you can try tightening the maghandle a little to reduce the vibration.
If the board is still making a noise when in other riding modes check to see if there is any debris stuck to the board and that all screws are hand tight. If everything is clear please record a video for us that demonstrates the sound and upload it -here before contacting us. Please be sure to let us know you uploaded a video so we can check it for you and get back to you!