tekno neu have a suspect clak clak when spinning

[patxeik]

is just a little clack clack, its not too noisy, but when the neu was new i spinned the shaft and i didnt notice any clak clak. Maybe im afraid cause its a very expensive motor, just paranoic maybe.
As i said the neu seems to run as first time, but if it has any issue i wanna fix it before it brokes.
thanks