Originally Posted by
Andrew R Stewart
The elephant in this thread is "the gear shifter has been altered and looks right -doesn’t make a difference .
I agree -- this bike has twist shifters, or Shimano's version of GripShift. I've never seen an inexpensive grip shifter go through "alterations" and come out better, or ok. Those things just break.
If you disconnect the front derailleur cable, and the chain shifts to the small chain ring, I'd suspect you need a new shifter.