Newbie with a question about front derailleur installation and adjustment. Old bike with Shimano Golden Arrow components, friction shifters. Hopefully that provides necessary details.
When I try shifting to the largest chainring, the front derailleur springs back to the smallest chainring as soon as I let go of the shifter. I can't find anything about this anywhere so I wouldn't be too surprised if it is really simple. Personally I think I need to tighten the cable or route it differently. Any suggestions?