Dura Ace Di2 Front Derailleur Not Working

The way it s shifting now is that it tries to catch the big chainring but it takes much longer than it s supposed to.

Dura ace di2 front derailleur not working.

Check you battery by holding down your shifter. Check derailleur rotation and l limit screw setting. You can change gear even under heavy load while climbing or accelerating. What could be the issue.

The crankset is a dura ace 7900 and it only has 300 miles. Chain shifts well to largest front chainring but outer cage rubs after shift is completed. Chain shifts slowly or not at all to smallest front chainring. This happened to my rd shortly after purchase last year.

Front derailleur index setting off and or l limit screw too tight and or rotation of cage is off. With di2 you are in complete control. Note that i could also have selected the dura ace fd r9150 front derailleur if i wanted to. Check front index setting.

Though the h11 crank has a slightly wider chain line for disc brake dropout spacing that would not be an impediment to it working with current 11 speed di2 road front derailleurs. The bike shops stated so but can t seem to fix the issue. If you find it hard to remember which button shifts up or down think of it this way. This happened for a few weeks until i couldn t get the rear derailleur to shift.

Back off the allen screws and it should start working. Even in the most extreme conditions shifting is precise and controlled. The 11 speed dura ace di2 rear derailleur ensures ergonomic stable and effective shifting without stress thanks to a low profile design and shimano shadow rd. Whenever i shift from small to large chainring it s not smooth the way di2 is intended.

Shift the di2 front derailleur in order to shift the front deraileur you use the left lever and press either switch x the bigger button or switch y smaller. The front derailleur maintains its compact and smooth appearance for the dura ace r9100 series. Thanks to its clever design it can handle a cassette range of 11 30. If they do not allow clearance for the derailleur to move freely they will essentially cause it to bind and not allow it to shift because there is too much pressure on it.

Di2 gives you instant accurate lighting fast shifts the first and every time at the push of a button. Start with your battery and work your way down. Pressing the larger button will shift to a larger chainring. In the image above i have selected the sm ew90 junction box r9150 series dura ace shifters and two 11 speed derailleurs.