shimano 600 sis shifting
So I'm new to this forum and found tons of info about the shimano 600 sis shifters. Only thing I couldnt find is how to change them from index to friction (or vis versa). I took it apart but could see anything that would change the shifting mode. I also try to turn the ring on the outter part to friction or index but it doesnt really turn easily. Any info would be helpful. thanks