Bike Balancing, How is it done? When riding hands free, I am noticing my bike is more oriented towards a particular direction (In my case: left). I tried to check of what my problems might be:


I check the handles, if they were of equal lengths on both side
I also check, if my saddle was not straight. 


I can't find out what is causing them. Please tell me, What are things, steps and techniques needed to balance a bike.



More Info:


The problem started after my last servicing.
I do use multiple bikes, and the orientation is not the same for both of them. So, my personal balance and weight does not affect this case.
Check also that your headset is correctly installed - my bike pulled to one side until I checked the bottom race and saw that it wasn't flush with the head tube.