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ECU Tuning
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Hi, I've got a 2007 MT-01, pretty stock with the exception of a high flow filter and a decat. I've got a set of DAM pipes on the way and am starting to wonder about ECU tuning. A lot of the info on this bike seems to have evaporated, so I'm wondering if anyone knows about the ECU/O2 sensor and the best path for tuning A/F. I notice a O2 sensor on the header, is there any chance this means the bike is closed loop and can adjust fuel trims? I've heard a little bit of conflicting info on this.

If I have to mod fuel trims myself, is there any way to edit the actual ECU? I see cables and software for other Yamahas, but the MT01 being a bit of an oddball, I'm not sure what my chances of getting a cable meant for another bike to work.

If I have to use a add-on box, I was thinking maybe a Power Commander V plus autotune. Not sure if I can replace the existing O2 sensor, or if the bike ECU needs to keep that and I'd need to weld in a second O2 bung. Any better options I should be looking at instead?

Thanks in advance. I've been searching but it looks like a lot of the MT forums have vanished and I haven't found a lot of tech info on this bike.
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Re: ECU Tuning
« Reply #1 on: »
It most certainly has closed loop. One way of enrichening the mapped part of the injection schedule could be installing a Booster Plug. The BP fools the computer to think the ambient temp is lower than it is and meters out more fuel. Of course it is designed for a stock bike, maybe yours is too modified for it to work properly?
I haven't tried the BP myself, but I will.
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Re: ECU Tuning
« Reply #2 on: »
There is a German chap, Michael, who does proper reflashes of standard ecu so that you can remove the dependency on the 02 sensor. It’s basically impossible to tune them without this being bypassed. On the old site there were hundreds of pages of discussion!
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Re: ECU Tuning
« Reply #3 on: »
Quote from: Danmt on June 26, 2018, 05:04:31 am
It most certainly has closed loop. One way of enrichening the mapped part of the injection schedule could be installing a Booster Plug. The BP fools the computer to think the ambient temp is lower than it is and meters out more fuel. Of course it is designed for a stock bike, maybe yours is too modified for it to work properly?
I haven't tried the BP myself, but I will.

  It doesnt work- save your dough.
  Unplug the IAT sensor in the headlight. You get an Engine light but it enrichens the fueling thinking its -20C !
  or
Add the Optimiser ( Dynojet Optimiser for MTO1)
  or
 Get Michael to flash the ECU properly..!
 
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Re: ECU Tuning
« Reply #4 on: »
in what way doesn't it work? Fooling the ECU to think it is -20 seems a bit drastic to me.
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Re: ECU Tuning
« Reply #5 on: »
As Tim says unplug the temperature sender actually fools the ecu that it's -30 thus adding more fuel (maybe too much if the air temp is actually 25)  the booster plug I have reads the outside temp and only cheats the ecu to think it's 10 degrees lower than the actual temp so richens by not quite so much.
The booster is best for a stock ecu and not really needed for my moded ecu and pc111 so I may sell it cost £115 would take £60 inc post in the UK it's plug and play fitted in 5 mins
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Re: ECU Tuning
« Reply #6 on: »
Quote from: Danmt on July 04, 2018, 07:06:20 am
in what way doesn't it work? Fooling the ECU to think it is -20 seems a bit drastic to me.

  The ECU works it out beause it reads O2  gas analysis and changes the AFR back...!

  Booster Plug is a simple resister. Costs maybe five bucks in a hardware store...Waste of time IMO !
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Re: ECU Tuning
« Reply #7 on: »
When the engine is in closed loop, you ar correct. When it isn't you are wrong. Closed loop only works when load and rpm etc are more or less constant.
When you nail it it is on the fuel map and that can be changed (PC) or fooled (BP).
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Re: ECU Tuning
« Reply #8 on: »
Quote from: Danmt on July 06, 2018, 02:07:21 pm
When the engine is in closed loop, you ar correct. When it isn't you are wrong. Closed loop only works when load and rpm etc are more or less constant.
When you nail it it is on the fuel map and that can be changed (PC) or fooled (BP).

  Actually...you are not correct about closed loop...!
 It is working between 0-20% throttle openings...and/or  0-3250rpms ( I think!?!) Anyway..load is way too sophisticated for this ECU. Boosterplug may alter AFR outside closed loop but you have no idea/control over how much/actual afr. I mean, it isnt tuning in any real sense of the meaning.. so you might aswell unplug your IAT sensor.
Or add an Optimiser which successfully enriches closed loop AFR.
  Remember, we use this engine in 0-3250rpms (closed loop)  ALOT !! It is a decent solution to lean running engine issues....

  The best tuning solution ( maybe if you are in Germany , you can have issues with O2 sensor absence at testing etc?!) is from a German. Micheal will reflash your ECU and reload it with a pretty decent map, tailored to your specific set-up...! I personally run Stage 3 ECU with PC V and double map made on the dyno...  ;)

  Boosterplud is still just a fi'dollar resister from Walmart...!! ;D

 
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Re: ECU Tuning
« Reply #9 on: »
Well, I will not defend a product I have not used, but the idea of the BP is to make a stock bike run better and smoother since many newer bikes are set very lean to pass emissions standards. The main thing here is wheater it works or not and I cannot say anything here. My original response was only to alert the TS of its existence.
Of course it is a resistor, the trick is finding the value of a resistor thats works optimally. That is what we are paying for and of course the hardware and the manufacture of the kit. Still a bit expensive, I admit.
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Re: ECU Tuning
« Reply #10 on: »
Quote from: Danmt on July 07, 2018, 07:43:40 am
... since many newer bikes are set very lean to pass emissions standards.

   So then, we are talking about the closed loop area..?
 It will always get "corrected" by the ECU in conjunction with the O2 sensor analysis...so it works initially but is being modified continually from the moment the bike starts, until it returns to stock...!
  I have seen guys buy variable resisters and fit them. These they adjust from the handlebars to increase/reduce fueling ratios. I dont recommend it. You have no "quantitive" data. It is is "bucket" tuning !!

  Trust me. If you want a working solution for the closed loop...Optimiser is they way to go..
  If you want to tune the entire range, Michael's reflash is the solution. It does away with the O2 sensor, ExUp, and all the other "parameter" blocks especially with RP18 bikes, like noise control with ExUp in 3rd gear, rev limiting and so on....This is not an exhaustive list of RP18 restrictions that further stiffle your engine. They were made to meet EU3.
  They are even worse these days..Believe me when I say, they modify you ignition out of sight to make "cruising" loads very low emissions. It is all very "counter intuitive" with respect the science of Internal Combustion Engines. Govts know best !!! ???

   ;)
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Re: ECU Tuning
« Reply #11 on: »
No, I was referring to the map-conditions. Closed loop is another thing.
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Re: ECU Tuning
« Reply #12 on: »




Suitable for stock ECU
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Re: ECU Tuning
« Reply #13 on: »
i am very tempted, if nothing else to see if it works.
How much with shipping to Sweden?
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Re: ECU Tuning
« Reply #14 on: »
Don't know mate can find out if you give me an address :)
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  3. ECU Tuning