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Old June 2nd, 2015, 11:52 PM   #41
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Originally Posted by bicyclemarkm View Post
Keep it above 4000 and shell be happier
That said, I'm often down around 2000 in 1st or 2nd gear. I do get a bit of surging, but nothing if find intolerable.
thats right.

in my case i usually entering a village or town, where we have 50 km/h limits, i gear down into 4th and drive with 60-70 km/h and low revs thru the village.
unfortunatly this is exactly the range between 3000-4000 where surging occurs.
Gearing down into 3rd helps a little, but because of the extrem responsivness of the throttle it really does not help too much. it's simply a little more stressfull to drive than without that behaviour.

Last edited by ferdi; June 2nd, 2015 at 11:54 PM.
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Old June 6th, 2015, 09:00 PM   #42
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So I wanted to chime in again on this because I have been riding the bike more and noticed that this happens when I don't fully engage a shift. That is when I blip the peddle up and it doesn't click in all the way. Make sure you are giving her good shifts and you hear/feel the click.
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Old June 6th, 2015, 11:39 PM   #43
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Originally Posted by GR8 View Post
So I wanted to chime in again on this because I have been riding the bike more and noticed that this happens when I don't fully engage a shift. That is when I blip the peddle up and it doesn't click in all the way. Make sure you are giving her good shifts and you hear/feel the click.
haha, do you think that people complaining surging are not able to shift right, after 40 years of motorbiking .



by the way - have Rexxer Tuning now, bought a Rexxer EVO User and they sent me some files they have for testing, even I personally only want a file for original setup without stock airfilter and exhaust, 1 file with lambda and with exhaust valve disabled and 1 file with lambda disabled but exhaust valve still enabled.

tried different files
- with lambda enabled and exhaustvalve disabled - no real difference to stock, just louder in the range between 2000-4000 rpm.

- with lambda and exhaustvalve disabled for sport exhausts - was not satisfied with it, still felt surging in the sensible region

- with lambda and exhaustvalve disabled for a termignoni exhaust (even i have stock) - the file satsifies me, surging between 3000-4000 with low load is gone. the only complain i have now that idle is not stable and its sawing between 1000 -1400. when stopping you always mean it will stall every moment, even it does not. but it's not nice. when it idles longer, about 30 seconds or longer, it gets more stable and normal idling.

strange thing - fuel use is less than stock, even injection should be richer than with stock lambda regulation.
basically from my experience i would expect it with a little more fuel use than stock.

Rexxer promised me to send me files for my stock configuration. I am excited how these will work.

what i can tell from now - disabling lambda helps a lot against the surging.

but, everyone must decide by himself and some people do not suffer on the surging and bikes also are not equal, some bikes have more surging, some less.
may also depend on exact synchronization ?
but i suppose its not the synch, if its gone with disabling O2 sensors.

Last edited by ferdi; June 6th, 2015 at 11:43 PM.
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Old June 10th, 2015, 11:36 AM   #44
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Quote:
Originally Posted by ferdi View Post
haha, do you think that people complaining surging are not able to shift right, after 40 years of motorbiking .



by the way - have Rexxer Tuning now, bought a Rexxer EVO User and they sent me some files they have for testing, even I personally only want a file for original setup without stock airfilter and exhaust, 1 file with lambda and with exhaust valve disabled and 1 file with lambda disabled but exhaust valve still enabled.

tried different files
- with lambda enabled and exhaustvalve disabled - no real difference to stock, just louder in the range between 2000-4000 rpm.

- with lambda and exhaustvalve disabled for sport exhausts - was not satisfied with it, still felt surging in the sensible region

- with lambda and exhaustvalve disabled for a termignoni exhaust (even i have stock) - the file satsifies me, surging between 3000-4000 with low load is gone. the only complain i have now that idle is not stable and its sawing between 1000 -1400. when stopping you always mean it will stall every moment, even it does not. but it's not nice. when it idles longer, about 30 seconds or longer, it gets more stable and normal idling.

strange thing - fuel use is less than stock, even injection should be richer than with stock lambda regulation.
basically from my experience i would expect it with a little more fuel use than stock.

Rexxer promised me to send me files for my stock configuration. I am excited how these will work.

what i can tell from now - disabling lambda helps a lot against the surging.

but, everyone must decide by himself and some people do not suffer on the surging and bikes also are not equal, some bikes have more surging, some less.
may also depend on exact synchronization ?
but i suppose its not the synch, if its gone with disabling O2 sensors.
Sounds like you are on the right track here. i have serious surging, and really need it solved.
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Old June 17th, 2015, 09:39 AM   #45
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Getting a new ecu from Ducati next week hopefully it will solve my problems, hopefully it's with open loop all the way.
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Old June 17th, 2015, 10:23 AM   #46
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Getting a new ecu from Ducati next week hopefully it will solve my problems, hopefully it's with open loop all the way.
why shoudl it have open loop only ? do you have no restrictions in your country that it would not use O2 sensor regulation ?
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Old June 20th, 2015, 12:03 AM   #47
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Originally Posted by ferdi View Post
why shoudl it have open loop only ? do you have no restrictions in your country that it would not use O2 sensor regulation ?
No we have not.
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Old March 5th, 2016, 02:07 PM   #48
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So how did everyone's results come out? I just took my first ride and the light switch effect is really strong on mine. On my Z1000 I solved the exact same problem using 2 things - power commander and a throttle tamer. Not sure a fly by wire can use a throttle tamer cuz there is no cables.

Anyway, I'd love to get the ecu tuned if anyone knows a good place. Dynojets website has no PC for the hypers. Was just there.

This lambda stuff I just read is way over my head, but I'll google that up and see if I can do something in the meantime.
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Old March 5th, 2016, 08:42 PM   #49
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Quote:
Originally Posted by ferdi View Post
do you guys all not have surging at lower revs and lower speeds, e.g. when going constant speeds in citytraffic ?
Not saying some people might not have a problem, but it was jerky when I first rode it and now it's smooth if I want it to be.

The bike really likes decisive precise inputs, otherwise it will let you know. I've also found that it's sensitive to chain adjustment - to loose and it feels jerky.

I also found that at about 6000miles the engine seemed to l loosened up and the bike seemed all around smoother. Part of that may also be me getting more in tune with the machine; being in the right gear and keeping that wrist steady..
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Old March 6th, 2016, 02:13 AM   #50
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Originally Posted by appliance821 View Post
Not saying some people might not have a problem, but it was jerky when I first rode it and now it's smooth if I want it to be.

The bike really likes decisive precise inputs, otherwise it will let you know. I've also found that it's sensitive to chain adjustment - to loose and it feels jerky.

I also found that at about 6000miles the engine seemed to l loosened up and the bike seemed all around smoother. Part of that may also be me getting more in tune with the machine; being in the right gear and keeping that wrist steady..
i did not mean that the driver surges, i really meant the surging of the engine.
if you do not feel it or your engine does not have it, lucky man. this does not mean that others do'nt have it.

surging of my hs went away with rexxer tuning and disabling o2 regulation. this has really nothing to do with throttle behaviour and getting used to it. maybe a beginner or an unexperienced driver can generate surging also, but thats not meant with surging in this thread.
surging because of too lean air/fuel ratio is not new and not restricted to our hs or to ducatis. many bikes suffer from that, one more one less, depending on the efforts the vendor invested.
basically - the less cylinder and the leaner the mixture - the more surging.
early injected bmws suffered a lot, modern bmws do not.
you can read in many forums of many brands all over the world - surging is still a problem with lean engines.
i doubt that all these guys are not able to throttle right.
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