I have an early 90's mountain bike that I'm trying to get ready for a winter bike. It has Shimano Rapidfire shifters (two thumb levers on the front). I discovered the front shifter won't hold its place when the thumb lever is depressed, but it moves the cable.
Is this something I can take apart and fix? I didn't see an obvious way to take it apart.
I tried a regular thumb shifter I had sitting around, but that was a no go. The spring mechanism on the front derailleur must be different somehow from a regular derailleur.
I thought about just finding a cheap front derailleur for it, but I'd prefer to work with what I have if I can. I suppose I could set the cable so it's on the middle ring and run a 1 X 6 (might be 7, can't remember).