Joined: Dec 2011
Posts: 2,519
Likes: 18
From: Fort Worth, Texas
Bikes: 2000 Bianchi Veloce, '88 Schwinn Prologue, '90 Bianchi Volpe,'94 Yokota Grizzly Peak, Yokota Enterprise, '16 Diamondback Haanjo, '91 Bianchi Boardwalk, Ellsworth cruiser
I agree with the others. Sounds like it is most likely excess friction or binding in the cable and housing. That's the usual problem when I am fixing up an old bike. Clean or replace the cables and housing.