Creaking crank on Specialized Creo

[eBert]

I have a creaking sound when pedaling, I have checked and tightened both cranks but still hear this creaking sound when pedaling. Could it be coming from the motor? It creaks whether the motor is on or off.

 

[James340]

Check your pedals.See if it has any play.

 

[eBert]

Thanks, I found the problem it is the union between the seat post and saddler rails.