I am new to Bicycle Restoration/Conversation and just picked up a Schwinn Drifter with a Springer Front End that is in rough shape (rust). I know it is not terribly old but cannot find any information on it. It has the following Serial Number on the bottom of the pedal crank case SNFSD09JB8486. Can anyone tell me what year this bike was made? Also, I am thinking about converting it to motor driven and thoughts?