I acquired a Sun recumbent trike over the winter (to go along with my road and mt bike). It's a 21 speed, with grips that twist to shift. They are very stiff to shift. My wife is starting to ride it some, and she can hardly shift it. Do I need to lubricate the cable, or is there and adjustment somewhere that needs to be loosened? The bike has sat for a couple years without being ridden (was kept indoors).
If it just needs lubrication, what type lube should I use?