Put more tension in the cable before you re tighten.I'm not sure of the technical names here, i loosed the cable completely & unscrewed the metal bolt out but the metal bolt the barrel screws in does screw in much when inserting it back in, i wonder if the thread s damaged? Bike hasn't been used a great deal.
Yes, I then turned the barrel all the way in.
The problem is now even worse & i only have the 3 biggest gears.
If i completely loosen the cable the big gear lever will not click across. Could it be the shifter?