Joined: Jun 2013
Posts: 4,094
Likes: 1
From: Bozeman
Bikes: 199? Landshark Roadshark, 198? Mondonico Diamond, 1987 Panasonic DX-5000, 1987 Bianchi Limited, Univega... Chrome..., 1989 Schwinn Woodlands, Motobecane USA Record, Raleigh Tokul 2
Does this happen when you're stopped? What about on the stand. If you shift, then let the bike coast for a while without pedaling does it still happen?
I'd suspect a sticky "shift bar." There is generally a neutral between the gears on the old 3 speeds. If it's slow to shift it'll catch that momentarily.