How can you tell if the drive boss is restricted or not ? I have a 2004 S-9 that I bought for $100.00,it had been bounced off a couple of trees and had broken body parts;which with a lot of epoxy and a drimmel I have repaired. It ain't stock but I think will look good once painted. After I finally got it started with a new set of rings my top end is 45-50 mph,as far as I know this scoot is stock.How can I tell if drive boss has been changed ?Scooter runs great on flat land and down hill but a long uphill and I almost have to get off and push lol(pushmoble).