Engine brain modification

[Crago]

Understand emission and noise tests done in third at 5000 revs and performance surpressed at this point.

Told this can be sorted by dissconnecting the pink wire from the brain. Anyone any experience of this please?

 

[Montie]

Hello,
I messed around with mine 2 years ago now.  I disconnected the pink wire from the brain (plain pink -not one with white stripe on it) Personally I thought the difference was outstanding.  I wanted to see if it really made a difference so I went to a dyno man in Chingford, who kindly did a rolling road for free.  The results on rolling road were marginal in favour of disconnection, but that was without a forced air feed(no ram air).
I found that as soon as I disconnected it, the bike was smoother, and dam quicker. Pull through 2nd and 3rd very very good.
NOW-  Loads of people have different ideas on this.  I researched it a lot, because, obviously I didn't want to damage my machine.
Apparently, by disconnecting the pink wire you 'fool' the brain into thinking it is in 6th gear map. 2nd and 3rd gear are reatrded on the ignition (slightly) for emission and sound regs.  So, with the wire disconnected, every gear is getting more juice with the sixth gear map.  If you are in USA do not disconnect cause apparently it fools the brain into a 1st gear map, which makes the bike run to lean(bad bad).
As I said, I disconnected mine 2 years ago, 18000miles later, no damage(that I can see or hear), runs smoothly, starts no problem, no trouble to date,(touches wood).  I connected it back up when I took mine for its last warranty service and I noticed that it was running normally which was shite!!
Lots of people will prob say that it don't make a blind bit of difference, but as I say, I noticed a hell of a difference.
Try it if you like and see what you think.  
By the way - don't run down to your garage and cut it!!!
If you look at the plug there is a plastic insert on the plug, if you push it with a penny it 'pops' out.  You can then remove the wire(and pin) from the plugs so that you can replace it without any problem should you wish to do so.
Hope this answers your question.
Montie

 

[Egg]

Montie

you are in UK I presume??

disconnecting the pink wire will leave the bike in NEUTRAL map. (lower rev limiter, and altered timing and fuelling curves)

fitting a 15K resistor between the disconnected pink wire (ECU side) and ground will put the bike in 6th gear map.

and its easier to disconnect and fettle the pink wire from the Gear Position Sensor coupler under the tank..

Egg

 

[viking]

Do you have any dyno sheets with and without the pink wire mods? I'm always interested in free mods that make the bike run better.

Viking

 

[green busa]

hi
can anyone help i have a kitcar with a 04 uk hayabusa engine in it will this brain mod work for me as i can only find a pink and black wire and a pink with grey dots wire on the plugs that connect to the engine ecu

 

[ralnsplder]

Isn't this the same thing that the TRE does?

 

[PaceMaster]

A TRE with the correct resistor value will trick the bikes ECU to think it's in 5th all time...Most ignition advance and fuel--and removes the rev limiter that normally kicks in in 6th at max speed.. Works on my 01 ---not sure what it does on Newer models.

 

[SHODA]

Max speed limter actualy shuts down the #2 injector.The tre does make it think it is in 5th so this does'nt occur.Properly tweaked power commander will remove the 8* degrees of retard on 1st 2nd and 3rd gear that the factory has put in to keep regular joes from getting in trouble with full pulls.

 

[ralnsplder]

Just wasn't sure if he was referring to the TRE oor if he was thinking about another mod

 

[Heavy Metal]

Max speed limter actualy shuts down the #2 injector.The tre does make it think it is in 5th so this does'nt occur.Properly tweaked power commander will remove the 8* degrees of retard on 1st 2nd and 3rd gear that the factory has put in to keep regular joes from getting in trouble with full pulls.

So advancing it 8 degrees in 1 2 3 will solve that, now what about 4th 5th 6th what are they retarded by?

 

[shenoyp]

BTW ... whats a TRE

 

[him]

Montie

you are in UK I presume??

disconnecting the pink wire will leave the bike in NEUTRAL map. (lower rev limiter, and altered timing and fuelling curves)

fitting a 15K resistor between the disconnected pink wire (ECU side) and ground will put the bike in 6th gear map.

and its easier to disconnect and fettle the pink wire from the Gear Position Sensor coupler under the tank..

Egg

so you have a pic of where this is?

Also heavy metal...lose teh yellow font!

 

[Scooter]

Timing Retard Eliminator

 

[BusaCruise]

dayammmmm he fell for it...

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[riironman]

so does the pink wire theory work in the USA? and wont need a TRE?

 

[Johnnycheese]

Timing Retard Eliminator

what is that???

 

[him]

Hey could someone post a pic of where this pink wire is. i just pt teh resistor in the line of the pink wire right?

 

[shortBoarder]

yet another ancient post.....

 

[him]

not to acient the recent posts are dated june 10 even though the orginal was in 04