My neighbor bought a 2010 Trek 2nd district (chain-drive), last week. He sideswiped lady in his car and needed fast cash so I bought it from him. This is my first single speed. When I flip it over on its back and spin the rear wheel, there's enough friction to back-wind the cranks. Is this normal. I think it's a Shimano freewheel..dunno. The bike is all stock so it's whatever came with it. I plan on flushing it with WD40 to melt out the old grease and then spinning Mobil, Vactra 2 Through it.
any help would be appreciated