The Duckmeister wrote:
2: Big sprocket/big ring will naturally make noise due to the indirect chainline. Your limit screws won'tdo anything to help that. Winding the "H" screw out will actually make it worse, as the derailleur is allowed to get pulled further outboard by the shifter. Conversely, if you wind it too far in, you'll have trouble getting onto the big ring. Although they're low-end spec, even Sora brifters have a trim shift function - when in that big/big combo, gently tap the thumb shifter; you'll get a click, and the FD will shift inboard a little bit. It'll take another shift to get it to downshift. The FD side plates should be parallel to the chainrings, with about 1-2mm clearance between the lower edge of the outer plate & the tops of the tallest teeth on the big ring. You could try very carefully bending the braze-on hanger to realign the derailleur, or you could try filing one side of the slot a little bit to give you a bit of twisting room, but I would try another derailleur too. Front derailleurs come under far more load than rears, and it's not unusual for older ones to be a bit deformed and floppy on their pivots from years of the cable yanking on them. A new 105 will work, but may need a bit of patience on the tuning.
The Duckmeister wrote:3: Are you just getting the six clicks including the false shift & therefore skipping a gear further out, or are you getting the phantom gear click? The problem with using levers (front or rear) with one more available shift point that you need is that they can be really sensitive to derailleur limit setting and cable tension, 'cos they can start going into that extra shift zone that you don't need. Try winding the Low limit screw (the one closer to the ground when the bike is up the right way) in a little bit, but not so much that you can't shift up onto that sprocket. That will stop the lever a litle bit short, before it starts to engage that last shift point.
If you are skipping a gear further out, you have too much cable tension. Loosen it until it shifts smoothly. If it then doesn't shift back in, wind the top limit screw in a little bit. Check that the derailleur drops out to the top gear, then reset your cable tension.
Users browsing this forum: No registered users and 3 guests