Mine is a month old bike.Right from the beginning i have a vibration i

Mine is a month old bike.Right from the beginning i have a vibration issue with my bike at any speed.It irritates me so that i hate riding it.When I complain about it to the servicemen at the showroom,they told me that it is common for the new bikes.Two services already done but no improvement or change.It can't even ride my bike on 45 kmph speed.What might be the problem? Please suggest.

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