Replaced the shifter cable and housing and adjusted the derailer and it shifts...all 7 gears! The front brake is perfect but the plastic on the rear v-brakes is trashed so braking is only so-so there. I rode around the block which includes a steep colorado springs hill and low gear is low enough. I didn't try for top speed till I get the rear brake fixed. I'm always surprised when my shade-tree tinkering works. There will be fine tuning and upgrades down the road, and I'm gonna relish pedaling to each one!