When pulling my 1980 apart for rebuild I noticed that the axle adjuster on right side had no "notch" for chain adjustment. The nut looks like is put on with pipe wrench!!! My question is, not sure if axle adjuster is on wrong side or if it is from different bike. looking at pictures on here axles are installed with the axle nut on both right and left sides! For every thing to line up axle should be installed with nut on left side of bike, is this correct? thanks