Problem after changing the the sprockets and chain

[Rimmen]

Hello,

I´ve recently changed the whole sprocket kit in my SFV2 -22 (I asked a workshop to do the job).
The main differense now is that the front sprocket is a size smaller (one notch less). Otherwise the back and the chain is the same.
Yesterday i took the first longer ride after the change, and the bike is running great and feeling smoother with the smaller front sprocket. However, there are three things that have occurred with the bike after the package replacement that I've never experienced before:

1. Sometimes the quickshifter stops working when downshifting. I can still manually downshift, and after a short while, everything works normally again.
2. Occasionally, the gear indicator (the one displaying the current gear on the display) shows a hyphen and two lamps with an exclamation mark and an 'N' start blinking. The bike can still be ridden, and it shifts and runs as usual.
3. Shortly before I got home yesterday, about 1 mile away, the engine warning light came on. Maybe related to the above issues? I turned off the bike for a while to check if the light would go off, but it didn't. Otherwise, I didn't notice any difference in idling or engine sound.

As I mentioned, the bike is running well, and I don't hear any unusual noises or other issues. Since the package replacement, I've ridden around 15-20 miles, no more than that.

Today I did the "Tire calibration". But incredibly frustrated, I'm back home. In the calibration, I'm supposed to ride at 48-52 km/h in second gear. Almost every time, I stayed within that speed range, but still, it said 'failed.' I've been out for over an hour just trying to calibrate, but I failed constantly!
Maybe the reason I failed the calibration is that I didn't ride at all within the 48-52 km/h range as indicated on the display?

I have contact with the workshop and feel confident that he is going to help me, and we are going to talk to each other on Monday, but I need to know if some of you have experienced that same issue?

Thanks in advance

 

[Dark]

Failed gear position sensor ?

 

[Deleted member 14059]

Changed the gearing. The newer bikes are very sensitive to it. There's an additional procedure you or the dealer has to do beyond the tire calibration. There was a post on here about it a week or so ago.

 

[baggerman]

Reset the transmission and DQS adaptives.

 

[Deleted member 14059]

Resetting the DQS adaptives won't help. IIRC, from the post I mentioned, the newer owners manuals says after a gearing change to perform a tire calibration then perform a drive (transmission) adaptives reset, which you need the dealer tool or similar to do.

ETA: First post in this thread is what I was thinking of: 2023 V4R info to keep in mind

 

[DeussenEngines]

Hello,

I´ve recently changed the whole sprocket kit in my SFV2 -22 (I asked a workshop to do the job).
The main differense now is that the front sprocket is a size smaller (one notch less). Otherwise the back and the chain is the same.
Yesterday i took the first longer ride after the change, and the bike is running great and feeling smoother with the smaller front sprocket. However, there are three things that have occurred with the bike after the package replacement that I've never experienced before:

1. Sometimes the quickshifter stops working when downshifting. I can still manually downshift, and after a short while, everything works normally again.
2. Occasionally, the gear indicator (the one displaying the current gear on the display) shows a hyphen and two lamps with an exclamation mark and an 'N' start blinking. The bike can still be ridden, and it shifts and runs as usual.
3. Shortly before I got home yesterday, about 1 mile away, the engine warning light came on. Maybe related to the above issues? I turned off the bike for a while to check if the light would go off, but it didn't. Otherwise, I didn't notice any difference in idling or engine sound.

As I mentioned, the bike is running well, and I don't hear any unusual noises or other issues. Since the package replacement, I've ridden around 15-20 miles, no more than that.

Today I did the "Tire calibration". But incredibly frustrated, I'm back home. In the calibration, I'm supposed to ride at 48-52 km/h in second gear. Almost every time, I stayed within that speed range, but still, it said 'failed.' I've been out for over an hour just trying to calibrate, but I failed constantly!
Maybe the reason I failed the calibration is that I didn't ride at all within the 48-52 km/h range as indicated on the display?

I have contact with the workshop and feel confident that he is going to help me, and we are going to talk to each other on Monday, but I need to know if some of you have experienced that same issue?

Thanks in advance

With the front sprocket change the behavior you get is normal. The only way to fix it is by getting an ECU reflash.

 

[baggerman]

Resetting the DQS adaptives won't help. IIRC, from the post I mentioned, the newer owners manuals says after a gearing change to perform a tire calibration then perform a drive (transmission) adaptives reset, which you need the dealer tool or similar to do.

ETA: First post in this thread is what I was thinking of: 2023 V4R info to keep in mind

View attachment 51272

Ok. Don't reset the DQS adaptives. The point is to allow the DQS to relearn the shift variables when you change gearing. But if you prefer clunky shifting carry on.

 

[Deleted member 14059]

Ok. Don't reset the DQS adaptives. The point is to allow the DQS to relearn the shift variables when you change gearing. But if you prefer clunky shifting carry on.

Please articulate what exactly resetting the DQS adaptives does, and what "shift variables" are.

 

[SuperDomestique]

Duh he needs to synchronize his cardinal grammeter with his turbo encabulator

 

[baggerman]

Duh he needs to synchronize his cardinal grammeter with his turbo encabulator

Yep that would be it. As with say the oxygen sensors and such the ecu trims itself and stores the results based on the inputs from your riding (or here your shifting). So clearing the adaptives dumps whatever has been stored. Same with the transmission adaptives. You're dumping memory.

 

[Deleted member 14059]

 

[DV4]

Put the other sprocket back on, why would you want to lower the gearing on a streetfighter V4 anyway? In any case it will remove that variable and is the simplest solution.

 

[0260n25]

why would you want to lower the gearing on a streetfighter V4 anyway?

Obviously, nooners! The real question is, why do so many of us have downshift problems after changing gearing? Can't Ducati have a method to account for that instead of telling us not to change the gearing? Clearing and recalibrating does not always work, as many people with various models of Ducatis have reported (including me). Changing back to stock does not always fix it, either. It seems like the bike gets really f-ed up after changing gearing.

 

[baggerman]

What it's doing is learning stuff like cut times and I'm assuming the power feed in rate after the shift. Clear it, go for a ride and don't use it until you're someplace you can start making wfo shifts. Cleans up the clunkiness after a gearing change.

 

[baggerman]

Obviously, nooners! The real question is, why do so many of us have downshift problems after changing gearing? Can't Ducati have a method to account for that instead of telling us not to change the gearing? Clearing and recalibrating does not always work, as many people with various models of Ducatis have reported (including me). Changing back to stock does not always fix it, either. It seems like the bike gets really f-ed up after changing gearing.

There's a hard limit somewhere. When my gearing went off the chart shown above (I raised the gearing 3 times in steps) I could no longer get the downshifter to work. When I go back down to a 16 on the front from the 17 i'm running it comes back. Mine's a 21 sf.

 

[Deleted member 14059]

What it's doing is learning stuff like cut times and I'm assuming the power feed in rate after the shift. Clear it, go for a ride and don't use it until you're someplace you can start making wfo shifts. Cleans up the clunkiness after a gearing change.

Cut times are set in the ECU and IIRC, there are different times for where you are in the rev range. Resetting the DQS adaptives does nothing but maybe gives a placebo effect. It's only necessary to reset them when you change the DQS. Granted I didn't hear it from a Ducati master tech, but the adaptives are merely the values (voltages output by the DQS during use) the ECU comes to expect from that particular DQS.

No amount of resetting DQS adaptives will fix the intermittent downshift problem that comes with a gearing change.

 

[SuperDomestique]

Obviously, nooners! The real question is, why do so many of us have downshift problems after changing gearing? Can't Ducati have a method to account for that instead of telling us not to change the gearing? Clearing and recalibrating does not always work, as many people with various models of Ducatis have reported (including me). Changing back to stock does not always fix it, either. It seems like the bike gets really f-ed up after changing gearing.

This is Euro5 in effect. Adjust gearing ..... with emissions and mpg

 

[baggerman]

Cut times are set in the ECU and IIRC, there are different times for where you are in the rev range. Resetting the DQS adaptives does nothing but maybe gives a placebo effect. It's only necessary to reset them when you change the DQS. Granted I didn't hear it from a Ducati master tech, but the adaptives are merely the values (voltages output by the DQS during use) the ECU comes to expect from that particular DQS.

No amount of resetting DQS adaptives will fix the intermittent downshift problem that comes with a gearing change.

I think you just need to do it and realize the effect. And yes the DQS will not fix the downshifter problem but resetting the transmission adaptives will as long as your gearing is in range.

 

[Deleted member 14059]

FFS dude…LOL

 

[panibadboy]

Hello,

I´ve recently changed the whole sprocket kit in my SFV2 -22 (I asked a workshop to do the job).
The main differense now is that the front sprocket is a size smaller (one notch less). Otherwise the back and the chain is the same.
Yesterday i took the first longer ride after the change, and the bike is running great and feeling smoother with the smaller front sprocket. However, there are three things that have occurred with the bike after the package replacement that I've never experienced before:

1. Sometimes the quickshifter stops working when downshifting. I can still manually downshift, and after a short while, everything works normally again.
2. Occasionally, the gear indicator (the one displaying the current gear on the display) shows a hyphen and two lamps with an exclamation mark and an 'N' start blinking. The bike can still be ridden, and it shifts and runs as usual.
3. Shortly before I got home yesterday, about 1 mile away, the engine warning light came on. Maybe related to the above issues? I turned off the bike for a while to check if the light would go off, but it didn't. Otherwise, I didn't notice any difference in idling or engine sound.

As I mentioned, the bike is running well, and I don't hear any unusual noises or other issues. Since the package replacement, I've ridden around 15-20 miles, no more than that.

Today I did the "Tire calibration". But incredibly frustrated, I'm back home. In the calibration, I'm supposed to ride at 48-52 km/h in second gear. Almost every time, I stayed within that speed range, but still, it said 'failed.' I've been out for over an hour just trying to calibrate, but I failed constantly!
Maybe the reason I failed the calibration is that I didn't ride at all within the 48-52 km/h range as indicated on the display?

I have contact with the workshop and feel confident that he is going to help me, and we are going to talk to each other on Monday, but I need to know if some of you have experienced that same issue?

Thanks in advance

Did you do tire calibration?

Everytime you change gearing / tires, you have to do it