Remapping a Hyper 939

CPRICEIV · Oct 23, 2021

ferdi said:
guys,
have the same problem with my 939 hyperstrada.
have tried several maps made for me with rexxer evo, but none does really satisfy me and eliminates the surging. Also tried a rexxer map with lambda/o2 disabled, worked better but had other problems.
I now use a rexxer map together with a booster plug and the surging is completly gone. I am quite sure that booster plug alone does the job also.
booster plug is quite simple, it fools the ecu with the temperature pretending 20°C lower, you can see this also in display at actual temperature which is 20° lower than in real.
the result is richer running, which exactly eliminates the surging, with o2 sensor still active.

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I have the Rexxer map and Evo User box for my 821, (I can change maps at home) who did you get to adjust your map? Guy here in the states told me I can’t turn off the o2’s. I have that dreaded bad fueling at the 5000 rpm range and it drives me nuts. I also have a Rapidbike “easy” that isn’t currently installed that I may add back in to the equation.

ferdi · Oct 23, 2021

CPRICEIV said:
I have the Rexxer map and Evo User box for my 821, (I can change maps at home) who did you get to adjust your map? Guy here in the states told me I can’t turn off the o2’s. I have that dreaded bad fueling at the 5000 rpm range and it drives me nuts. I also have a Rapidbike “easy” that isn’t currently installed that I may add back in to the equation.

hi,
i dealed with Daniele Moto, the Rexxer founders, in Germany - https://www.daniele-moto.de/en/
Unfortunatly their most experienced programmers/technicians Christian and Sebastian Schimmelschmidt both left the company and since then I am not really satisfied any more.
Sebastian sent me different maps with my wishes, I always want maps with exhaust flaps active, because I can deactivate the flap with healtech exhaust eliminator by myself and I need this in case of a police contrrol, to set flap active.
Also with some Rexxer maps there was a real hole when accelerating from about 4500 which Sebastian could solve. But this ws with 939.
With my 821 I definitly had a fine working map with O2 deleted.
Unfortunatly Sebastian left the company during working on the 939 map without O2 and then nothing happened in this case any more..

CPRICEIV · Oct 25, 2021

Do you still have access to the 821 map?

ferdi · Oct 26, 2021

CPRICEIV said:
Do you still have access to the 821 map?

yes, but it will not help you because the map is zapped with bike_id and only can be used with a specific bike. The Rexxer for the 821 I sold together with bike..
But, if you send me your email via PM I will send you my Rexxerfiles together with description. Each file, which can be loaded on PC to your EVo terminal includes the original mapping of the bike and one or more tuningfiles, which you can load into your Ecu by your own.
If you want the tuningfile of an other .usr file you first have to load this .usr file onto you Rexxer Evo and then, with Evo connected to your bike, you can load the desired map into Ecu.
So, you will not be able either to load my files on Evo or/nor into your Ecu or your bike simly will not start with one of my tuningmaps.
But, maybe your tuner can take my files as template to create the same file for you.

Mr Duc · Nov 2, 2021

nickwst4 said:
The temperature-modifying Booster Plug did nothing for me, so I have one spare if anyone in the UK wants to try it. I went with the RB Easy and expert setting up, mostly because of curiosity and the reputation of the bike. Better is always an improvement even when nothing seems wrong, no?
I suspect my standard 2013 HS was never as bad as some of you here describe, and it behaves well with no obvious glitches. apart from the transient rev ramp-up on throttle closure which I'm told is common on recent Ducatis. Then again, I always run the touring map, so perhaps that gives the fueling an easier time? The dual nature of the bike on that map always brings a grin. Jeckyll and Hyde definitely, not that I can ever remember which is which!

Nick

Howdy Nick,

How has your life been with the RB easy? Distinct change?

I'm tired of the ever so slight bumpiness and might go for one this winter if it helps to fix the surging...

nickwst4 · Nov 3, 2021

Hi Mr Duc,

To be honest, when I bought the one-previous-owner, low-mileage, unmodified 821, I wasn't sure it's fuelling needed any intervention anyway, not like the dreadful grabby clutch. I could never be certain that any very slight bumpiness was anything to do with the motor, rather than just the suspension and poor road conditions. Certainly, I've never seen any credible evidence on the rev counter, and the engine has never actually faltered in a way that affects riding. As I said, my venture with the Booster Plug was mostly out of curiosity and my guru dismissed it as not being capable of any effect anyway with the Ducati injection setup.

The RB easy was not a distinct change that I could detect either. Certainly, the 821 is more "fussy" about throttle input than my other FI bikes, even in touring mode, but it's more exciting too so I accept its behaviour as coming with the territory. It may be my imagination, but the ride seems a little less smooth when the engine is hotter, or perhaps my concentration gets less. Bottom line is the bike is a keeper, so long as I have access to others that are less fiesty!

Nick

gatdammit · Nov 3, 2021

There's lots of testimonials out there about the BoosterPlug solving low end Ducati twin fueling issues. Just installed mine and will test soon. It's actually beautifully simplistic, which would be a tough pill to swallow if it was $200 or more. I think it's priced right if it does the advertised job. Also, it will not effect ECU coolant temp sensing and fan operation. This isn't clearly stated in any of their promotional material.

N4teTheGreat · Nov 3, 2021

I've had an 821 and a 939, the 821 never seemed problematic to me aside from not liking to do anything below 3k. The 939 on the other hand was frustrating to ride in any state other than hard on the throttle. Cruising around town and in traffic sucked. I simple tune from the T800 seems to have done the trick, it's not perfect, but I can cruise around town holding steady throttle in 1st and second without feeling like the bike is trying to buck me off like a wild horse.

ferdi · Nov 3, 2021

N4teTheGreat said:
I've had an 821 and a 939, the 821 never seemed problematic to me aside from not liking to do anything below 3k. The 939 on the other hand was frustrating to ride in any state other than hard on the throttle. Cruising around town and in traffic sucked. I simple tune from the T800 seems to have done the trick, it's not perfect, but I can cruise around town holding steady throttle in 1st and second without feeling like the bike is trying to buck me off like a wild horse.

As of my knowledge, T800 switches off O2 sensors, right ?

N4teTheGreat · Nov 3, 2021

That's correct, O2 sensors off, flapper open presumably a little richer fueling and the dash says Hypermotard Racing when you boot it up. Seat of my pants dyno says it's got more top end power, down lower in the RPM range power seems similar to before, but smoother.

timg · Nov 4, 2021

N4teTheGreat said:
I've had an 821 and a 939, the 821 never seemed problematic to me aside from not liking to do anything below 3k. The 939 on the other hand was frustrating to ride in any state other than hard on the throttle. Cruising around town and in traffic sucked.

Interesting. Like you I had a 821 and now have a 939. While I liked many things about the 821 eventually the niggles wore me down and I got a Tenere 700. My 821 had the dodgy clutch and woeful fueling. With hindsight I should have done the clutch fix and had the ecu remapped/Rexxer or whatever and hopefully that would have cured the major bugbears. When I test rode a 939 it was hugely improved over my 821. The clutch was fine and the fueling much better than I remembered. And it had a gear indicator but still no fuel gauge. 1500k's and a few trips done and I'm still happy to be back on a HS.

timg · Nov 5, 2021

gatdammit said:
There's lots of testimonials out there about the BoosterPlug solving low end Ducati twin fueling issues. Just installed mine and will test soon. It's actually beautifully simplistic, which would be a tough pill to swallow if it was $200 or more. I think it's priced right if it does the advertised job. Also, it will not effect ECU coolant temp sensing and fan operation. This isn't clearly stated in any of their promotional material.

I added the Booster Plug a couple of weeks ago and have had several rides in both town and open road situations. I read up about it extensively and the way it works seems to make sense to me, and as the cost is way less than a remap or Rexxer etc it seemed worth a punt. The Booster Plug has worked a treat. The bike is now happy to potter along at 2-4000rpm in the lower gears and rolling off and on the throttle is a smooth transition. It's better than the Tenere 700 I had previously and night and day difference to my old 821. Cheers.

ferdi · Nov 5, 2021

timg said:
I added the Booster Plug a couple of weeks ago and have had several rides in both town and open road situations. I read up about it extensively and the way it works seems to make sense to me, and as the cost is way less than a remap or Rexxer etc it seemed worth a punt. The Booster Plug has worked a treat. The bike is now happy to potter along at 2-4000rpm in the lower gears and rolling off and on the throttle is a smooth transition. It's better than the Tenere 700 I had previously and night and day difference to my old 821. Cheers.

fine that Boosterplug works for your 939, as it does for mine.
Why it does not satisfy everyone may cause that not each bikeias the same as another one.
One medicine cures one person but does not help the scond one. So it seems to be with bikes also ;-).

Remapping a Hyper 939

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