Shimano Revo Shift problem
My shimano revo shift (model# RS-41) 7sp shifter has 7 "clicks" - that is, it has 7 positions it will shift to. Somehow, the numbers got misaligned with the clicks so that I can shift 1 gear above 1 but will not shift down to 7. I have tried forcing the number ring back into alignment to no avail. It seems to be stubbornly attached to the twist mechanism.
It doesn't look like I can replace the shifter, either. From the looks of it, the shifter must slide off the handlebar (i.e. it will not separate into two pieces). However, my bike came with a rather "tacky" grip that will not budge and would be impossible to slide back on.
Even if I could replace it, I cannot find anywhere to buy a replacement shifter of this type.
I'm stuck. Where do I go from here?