I always have a problem to drive my small 125 honda bike on the wide street.

I am not sure where should I stay. If I stay close to the curb cars pass me on the left and if I stay on the right track close to the center car pass on the left.

What is the best position ? Can anybody help me ?

If you are talking about a multilane street then the best position is the wheel track that puts you closest to the centre of the right half of the street. i.e. if it's a three lane each way and you are in the left lane then you want the right wheel track. In the right lane you want the left wheel track. In the centre lane there really is no rule but being in the left wheel track puts you directly in front of the driver, so that's what I use when I have to ride that lane.

If you are talking about a single lane each way and the lanes are quite wide then you should be as close to the centre of the lane as possible without being on the grease track.

Also note that traveling at the same speed as the traffic so drivers don't need to get around you is safest no matter what that speed in relationship to the speed limit.

A 125 will do better than the speed limit on all city streets in North America.

Thank you very much. I will try it.

Luis