i have an old (i'm guessing mid 70's) japanese Schwinn World Traveler that I cleaned and tuned up [not really "tuned" yet]. It has stem mounted shimano shifters. the front derailleur shifts just fine for me... it's the rear that i'm getting fussy about.
when i pull the rear shifter back (putting tension on it) it clicks. when i push it forward, it glides with no clicks. i am used to a very smooth shifting Miyata with newer (late 80's) shimano shifters on it [that clicks both ways], and at every click, the rear derailleur moves the chain 1 cog over...
but with the Schwinn, it takes a couple or so clicks to shift... somewhat randomly. it does not click at all when releasing tension (pushing it back forward). this makes shifting very much a hit or miss thing for me, and i have to play with the shifter to get the chain on the rear cogs evenly.
I was wondering if this is normal with old shifters, or if i did something wrong installing the cables, or if the shifters are bad? i have no clue, so any advice would be helpful. thanks