I'm a little north of you, plenty of riding in northern NJ just most of it is quasi legal or illegal. Best to meet some locals to find the best/safest places. Pennsylvania has many beautiful & legal places to ride

How many splines are on the starter motor you have? Many of the 2 and 3-bolt starter motors have 9 splines to fit a 12 tooth sprocket. Can you post a few pics of your starter spline and the starter sprocket you have for it?