Joined: Oct 2011
Posts: 10,043
Likes: 2,505
From: Fairplay Co
Bikes: Current 79 Nishiki Custum Sport, Jeunet 620, notable previous bikes P.K. Ripper loop tail, Kawahara Laser Lite, Paramount Track full chrome, Raliegh Internatioanl, Motobecan Super Mirage. 59 Crown royak 3 speed
This is typical of a lot of used Unilglides for the 14-15 cogs to be worn out not work quit right. You are doing nothing wrong the cogs are likely worn out they can look just fine and still be toast. Hitting it with a power tool will likely do nothing but if you only go after the 14-15 freewheel cogs you don't have anything too loose. What you need is a nice 6/7 freewheel vintage or new to fix most of your problems.