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Old June 22nd, 2015, 11:37 PM   #1
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Joined: Jan 2015
From: Austria
Posts: 275

I Ride: 2016 Hyperstrada 939, red
Rexxer Tuning against surging

i wanted to open an own thread about the REXXER so that this does not get lost in the surging thread


So, got several files from Rexxer and tested them, with and without Lambda regulation, with and without exhaust vent.

The files without lambda solve the surging. bike runs really fine.
I have to run longer and more kilometers with them to have exact numbers, but as of now the only disadvantage is that bike uses a little bit more fuel (about 0.3 - 0.5 l / 100 km ). Thats not really bad for the improvement you trade in. But that's clear, as bike runs richer in most cases, it has to use more fuel, it's physics.
Bike runs very smooth, much smoother than original. It's not so hard on the throttle when load changes, and much smoother to drive.

I really can recommend the Rexxer tuning.
I bought Rexxer EVO user, where you get a little display with cables (USB for PC and one to connect to ECU).
First you read the original file and send it to Rexxer and from them you receive your wanted tuning files (2 are with the price of € 499 included) back.
You load the file with their PCprogram via USB onto the little Rexxerbox.
In this file the tuning files and original mapping is included and when writing to ECU you can choose between one of the tuningsfiles or the original one.
For files without lambda, o2sensors have to be disconnected, whats no problem, because the plugs are easy to find and disconnect.

I really can recommend Rexxer, the guys are very friendly and responsive, most of the time i got changed files on the same or on the next day.
Now they have a lot of files for orignal exhaust, for termignoni or other exhausts, with and without o2 regulation, with or without exhaust valve.
you tell them what you want and they send you such a mapping.
e.g. i did not want a tuning file with changed advanced ignition, as their normal tuningfiles are, so they made me a file with original ignition settings for high rpms.

Advantage of Rexxer against piggypacks and additional fuelcontrollers: you change the mapping directly in the ECU and with EVO user you can do it by your own. And you can change back to original config if you want. You do not need any additional box installed like with PCV or other fuelcontrollers and you do not need other persons to change your mapping.
Rexxer box also can find ECU errors and delete them, so the box is an OBD2 display/box also. And its small enough to take it with you on vacation to do self diagnosis in case of problems and errormessages.

I will keep you updated in any case. But, as of yet I am really convinced that the REXXER tuning is a very good option and value for its price.


PS: here is the Rexxer website - http://www.rexxer.eu/e_rexxer.cfm
PPS: i am no employee of Rexxer nor do i receive a commision, i am just a happy customer

Last edited by ferdi; June 23rd, 2015 at 12:36 AM.
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Old June 23rd, 2015, 01:10 AM   #2
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Joined: May 2014
From: Austria
Posts: 62

I Ride: Hyperstrada 2013 \ SV650 S K03
Hello Ferdi,

My duc dealer also meant that the problem comes from the lambda regulation
and recommended a rexxer mapping.

Thanks for the testing,now im convinced to do the mapping.

My dealer asks 220 for the mapping, do you think the price is OK for the mapping only?

Thanks
Wbr
Sh
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Old June 23rd, 2015, 02:53 AM   #3
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Posts: 275

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Quote:
Originally Posted by silenthunter View Post
Hello Ferdi,

My duc dealer also meant that the problem comes from the lambda regulation
and recommended a rexxer mapping.

Thanks for the testing,now im convinced to do the mapping.

My dealer asks 220€ for the mapping, do you think the price is OK for the mapping only?

Thanks
Wbr
Sh
sh,
the price is ok, but consider that you then have a fixed mapping in your ECU which cannot be changed any more without interaction from your dealer or any other Rexxer partner.
When your ECU is reflashed with a newer release at service, your Rexxer mapping is gone.
For a little more than double the price, with the Rexxer EVO user, you can install original mapping before service or for "Pickerl" by your own and after that you can install Rexxer mapping again. Changing map with Rexxer Evo user does not last longer than 10 minutes, including reset of all things like TPS, adaptive system ... (3 things to reset)
And, you have 3 maps to choose for € 499 - original and 2 tuningmaps. And its an OBD2 reader for errors and resetting them also.
If you do not want or need these features, the price is ok, even Rexxer itself does it for € 199,--.

I am not sure yet which mapping i will use in the future: no lambda + exhaust valve active or no lambda and exhaustvalve deactivted.

From where in Austria do you come from ?
Is the Rexxer point your Ducatidealer ?

Last edited by ferdi; June 23rd, 2015 at 03:00 AM.
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Old June 23rd, 2015, 05:16 AM   #4
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Joined: May 2014
From: Austria
Posts: 62

I Ride: Hyperstrada 2013 \ SV650 S K03
Hello Ferdi,

I'm from Innsbruck and yes, my rexxer tuning Partner would be my duc dealer.
So there should be no Problem if the ECU got reflashed,
because he knows that the bike has the mapping and he can reflash the rexxer afterwards,
If there is an updates Version.

Gesetz SH
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Old June 23rd, 2015, 08:38 AM   #5
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Joined: Jun 2015
From: Czech Republic
Posts: 44

Hello Ferdi,

Thank you very much for your exhaustive report. Could you please be more specific on how to disconnect the lambda sensors and what to do with them afterwards? i would also like to hear how the Rexxer reflash interacts with the Strada's switchable riding modes. Thanks!
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Old June 23rd, 2015, 10:10 AM   #6
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I Ride: 2016 Hyperstrada 939, red
Quote:
Originally Posted by Cerv View Post
Hello Ferdi,

Thank you very much for your exhaustive report. Could you please be more specific on how to disconnect the lambda sensors and what to do with them afterwards? i would also like to hear how the Rexxer reflash interacts with the Strada's switchable riding modes. Thanks!
the riding modes are not affected by the rexxer map. the map stays the same in all different riding modes, the difference in the riding modes is only how much load is called up with how much throttlemovement.

what do you want to know about disconnecting plugs of o2sensorcables ?
you simply follow the cable from the sensor until the plug and then disconnect it there.
this is on my HS in front on the left side behind the coolinghose and for the back sensor on the right side under the silver fairing, but accessible from outside.
I guarded the plugs with insolation tape, so that no moisture can enter the plug and put them together with isolation tape so that it looks like they would be connected with isolation tape surrounded, but of course are not connected.
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