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 Post subject: Di2 fine tuning problem
PostPosted: Sun Mar 19, 2017 2:38 pm 
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I can't get my Di2 setup to work properly.

Problem:

With the chain on the 34T: shifting in the rear is poor, so I used the fine tuning setting to adjust the gears (setting -3). Now all is well, but when I shift to the big ring (50T), shifting in the rear is mediocre. By using the fine tuning settings again I can make the gears work properly again, but obviously that doesn't solve the problem. It's a vicious circle.

Hardware

- Ultegra Di2 11-speed
- Long cage derailleur
- SRAM 11-speed chain
- Marchisio 11 speed cassette 13-30
- Quarq power meter

What have I tried to solve the problem

- Aligning the derailleur hanger about 6 times
- Using a brand new derailleur hanger (including alignment)
- Re-adjusting the inner and outer limit of the RD
- Adjusting the B-screws on the RD

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Last edited by havana on Sun Mar 19, 2017 7:27 pm, edited 1 time in total.

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 Post subject: Di2 fine tuning problem
Posted: Sun Mar 19, 2017 2:38 pm 


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PostPosted: Sun Mar 19, 2017 6:00 pm 
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Just curious - have you had these same shifting issues with any other cassettes? I've personally found that sometimes the cassette can be the problem (for instance, EDCO cassettes are really crap for me for shifting, whereas SRAM seem to work fine).

Also- is the shifting poor in any particular place in the block? (top, middle, bottom or poor throughout)?

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PostPosted: Sun Mar 19, 2017 7:25 pm 
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is the mech bent?

I had a similar issue on a mechanical set up when the joint between the cage pivot and the cage itself got knocked and bent slightly


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 Post subject: Di2 fine tuning problem
PostPosted: Sun Mar 19, 2017 7:27 pm 
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I just switched to 11-speed, unfortunately this is the only cassette I've got. My other bike is 10 sp Campy.

The problem appears to occur in the middle of the cassette.

Sprockets on Marchisio cassettes sit into plastic spacers. The sprockets can be mounted 2 ways; with the little mark facing outwards or inwards. Not sure if it's important to install them all the same way. This could be the problem however.

I've sent Marchisio an email about this.

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PostPosted: Sun Mar 19, 2017 8:24 pm 
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Have the derailleur hanger checked for proper alignment.

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PostPosted: Sun Mar 19, 2017 9:40 pm 
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That's my next step. I've checked it about 6 times with a professional Parktool tool but it's probably a good idea to get a second opinion.

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PostPosted: Sun Mar 19, 2017 9:40 pm 
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havana wrote:
Sprockets on Marchisio cassettes sit into plastic spacers. The sprockets can be mounted 2 ways; with the little mark facing outwards or inwards. Not sure if it's important to install them all the same way. This could be the problem however.
It almost certainly has something to do with it, the shift gates and ramps will be on the wrong side of the sprocket.

Either try (borrow) a shimano 11 cassette to check, or put your marchisio together properly and try again.

The change in chain tension between 34 and 50 may mask the problem in one ring, but not the other.


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PostPosted: Mon Mar 20, 2017 12:43 pm 
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Not sure how one should position those sprockets.

The largest sprocket (which is a normal sprocket so it will only fit one way) has the teeth mark facing inward.

The smallest two spockets (which only fit one way) outward.

Not sure how to position the middle sprockets.

Sent Marchisio an email for clarification.

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PostPosted: Mon Mar 20, 2017 12:52 pm 
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how about a nice ultrga cassette by the look if every thing is straight the elephant in the room is the Marchisio

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 Post subject: Di2 fine tuning problem
PostPosted: Sat Mar 25, 2017 10:30 am 
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For some reason I had forgotten my wife uses 11 speed. Swapped her 105 cassette over to my bike. Problem fixed! Marchisio is on its way back to the supplier.

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PostPosted: Mon Mar 27, 2017 6:52 pm 
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I suffer from the same fine-tuning.
Especially, I am thinking about how to configure the Synchronized shift.


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PostPosted: Mon Mar 27, 2017 10:08 pm 
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Posts: 11
This might not apply to you but it did to me for the littlest smoothness increase using a shimano chain vs. sram.

if all the other suggestions fail, try a shimano chain. might be placebo but I didn't have any hesitations or smoothness issues after using all shimano parts.


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Posted: Mon Mar 27, 2017 10:08 pm 


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PostPosted: Mon Mar 27, 2017 10:11 pm 
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also. if you aligned the derailleur hanger 6 times, its already a bit fatigued. so may not be as stiff and rigid as a new un-fatigued hanger. Keep in mind, hangers are designed to have a set amount of deformation before it weakens.


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