This is right off the Pa DCNR website:
All ATVs in Pennsylvania, except ATVs used solely for business or agricultural purposes, need to be registered and titled with DCNR. ATVs used in Pennsylvania must be registered and titled with DCNR's Snowmobile/ATV Section. The ATV registration and...
Well I too live in Pa and yes we do need atvs to be registered to be legal, unless you are riding it on your farmland, but to ride on state lands or most of legal riding area it has to be registered.
Kewl, great price and i'll take one i'll send the money pay pal friday or sat morning after i get home from work. As for the sizes you were askin about, uhhhh i dunno, i'm very new to this so if ya culd help me out a bit and explain how i can find out the sizes i need would be greatly...