O2 sensor eliminator mod (By Kev with the help of dazmatic)
 

Note: Jump to latest (2012 on) plug 'n' play version here

Well, I've finally got a working version fitted onto my bike this morning and tested it whilst sitting on my driveway. Initial indications suggest that it works as well as expected if not better and would appear to not interfere with the running of the bike and was actually a lot easier to install than I first imagined it would be which is also good.

I did however go for a ride to get some shopping and well...

WoW

No surging or bucking, bike rides a lot lot more smoother now.
Was an absolute dream to ride!

It produced a good map which I thought I'd saved to my PC but hadn't! I now can't be arsed to go back out again and setup my laptop to read it but will do it tomorrow or something.
But I assure you, it looked good.

A few pics of it in place. Be aware though, this is just a prototype. Hopefully the next one will be pukka!

Mod in its location whilst installing.

http://dc246.4shared.com/img/3661072...0/DSCF0210.JPG

Sensor

http://dc246.4shared.com/img/3661082...1/DSCF0211.JPG

Live feed to the mod taken from the loom, from the same place where the live feed for the PCV is taken from. Wrapped in special electrical wrapping tape (not that nasty sticky tape!)

http://dc246.4shared.com/img/3661089...e/DSCF0212.JPG

PCV Under the tail section with wire for analogue feed (PCV can now tell the engine temperature!) and my Autotune Switch and Autotune just to the right.

http://dc246.4shared.com/img/3661100...8/DSCF0213.JPG

The finished prototype installed under the seat and held down with sticky pads.

http://dc281.4shared.com/img/3661284...e/DSCF0220.JPG

Looks good but will this mod only work with a PC5 or will it work with a PC3

Unfortunately, I cannot make any promises yet.

However, I don't see why not so long as there is a bit of dyno time involved.

I don't have a dyno near me hence why I used a PCV with autotune. Not to mention I can mod my bike and be able to remap with that new mod.

All this mod does is keep the bike in open loop mode so that the entire rev range can be mapped.

No more 'Cannot map at 20% throttle between X and X rpm'

Bare in mind, this mod is only for bikes that have an O2 sensor, so 2007 - 2009 I believe? Something like that anyway...

:applause:nice one Daz....if one arrives in time for my Dyno, we can test it!:bunny:

Haha...

I know it will work, Kev and I have proven that.

But thats not the thing that needs testing really, however, I can't say as of yet what is.
I'm sure it works, but just need to be doubley trippley sure of it.

The real thing is, putting together something that can be distributed.
I need to compile a shopping list of bits and create a design that can just be wired up easily straight out of the box and be of good enough quality too.

As you can see, what I've made here is (I think) rather crude and if I do decide to make more would like to make something of a better standard.

I know of a design that I would like to use and need to trial it first but that requires cash, something which I don't have a lot of at the moment so may have to wait till I can afford to develop this a bit further.

This is a joint venture between Dazmatic & myself.

As I mentioned before I found a way to turn off the the O2 sensor on our XT's a few months ago & could prove that it worked by looking at the air fuel ratio while riding. I made up the mod using relays & temp switch's which was to complicated for the average person to wire up, I asked for help & enlisted dazmatic to help me make an electronic version that was easier to wire up.

Dazmatic has done well, the mod will need to be tested for a while before we can say it is a reliable working mod. We will need to build special fuel maps for the PCIII & PCV to go with this mod.

Yes it should work on any XT660 with a O2 sensor, but you will need a PCV or PCIII for this mod to work, as a new fuel map will need to be made.

The proof.

The surge before.
http://www.youtube.com/watch?v=ZwTfuwZZ848&feature=channel

The O2 sensor turned off.
http://www.youtube.com/watch?v=1Y9mqJtXtm4&feature=channel

Indeed!

This involves finding a switched 12v source and ground.
Placing a sensor in the correct location which is easy enough.
And just piggy backing a single wire going to the temperature sensor.

Kev came up with the initial idea after his findings and informed me of what he was trying to achieve.
I did a little digging and came up with something that looked promising which you see here.

Kev's been well informed during the whole design stage and has a copy of diagrams used etc.

As he says, it will require testing for a while before it can be called reliable and I will hopefully soon have another working model which I can mail out to Kev to inspect for himself.

Watch this space!

Just to clarify and to put everything in prospective, Kev has been working on the 02 eliminator since it first came out in 2007, he has also been looking for the assistance of someone as valid as dazmatic with the required knowledge on printed circuits, transistors and all that razzmataz.

dazmatic kindly volunteered to help, and both myself and Kev are very grateful for his collaboration, however it's only fair that all the homework on this mod is 100% credited to Kev who originated the research.

Let's hope this is agreed by all.

Thank you.

Yes, you guys are on to something here. A very important mod.

Kev, I would really like one of these when fully developed, tested etc. Put me down for one. If things progress at a good pace Kev, and you are happy with it, I would like one before my next dyno in 3 weeks,, (which I could delay....), even if its not the fully commercial model.

Well done to both Kev the inventor, and Dazmatic for his development. (that's fair isn't it?)

You flatter me!

In all honesty, my history is in mechanical, I am afterall just starting my 4th year in my apprenticeship (but still go to college for an HNC!)

This whole thing was entirely new concept to myself and went through a couple of variations untill I took Kev's idea on board and developed it into what you see here. I knew very little of transistors, circuits or anything of the sort before hand and had to learn it all as I went along. Thank goodness for Wikipedia :110:

But Kudos to Kev for his findings as without it we'd not even be having this conversation!

You've done a good job so far Daz...and it looks like you've had fun doing it too!

Has been a lot of fun! Enjoy tinkering with electrical things despite being mechanical biased and you'd never believe my suprise when I built the very first scraggly messy board and connected it up to a car battery in the garage only to see it work!

I will be putting my bike back to standard to test the mod over a few weeks to iron out any bugs.

If Nigel can make up a mod for you we would be greatful to see it run on the dyno. I will fill you in to what we need tested if Nigel can get one to you in time. :walk:

Kev, that would be great if that were possible....my bike is running really well (but not quite optimised) , so I am not in a hurry for the re-dyno, unless the dyno tell me otherwise.......

Guess what...
 

I went out and did a little bit of shopping today.

http://dc243.4shared.com/img/3668619...3/DSCF0221.JPG

http://dc243.4shared.com/img/3668622...9/DSCF0222.JPG

http://dc243.4shared.com/img/3668625...1/DSCF0223.JPG

Looks like KITTs baby...

These aren't finished items by the way, these are 'For Testing Purposes Only'

I'm hoping I can set these up as a bolt on thing though so say for a real world example, someone like Richard here can just hook it up without the need for adjustment.

Including mine thats fitted to the bike currently, I have enough bits to make about 3 or 4ish.

However, seeing as the one fitted to my bike is a prototype, I see its only fair that I have a special one, so I shall make that with future upgradability should something else come along that can be intergrated with it :tongue5:
(don't ask what though cause I don't know myself, its just because I can :icon_thumright: )

The finished articles will have loads of flashing multi coloured lights, sirens, some wings to enable flight and a go-faster stripe though :icon_thumright:

yip...Bells and Whistles as well on my one please!! (just 'cos ):098:

I'll just be happy to get another battery for my laptop!
It's just a pain in the rectum having to open the garage, reel out the extension reel, boot the thing up etc...

Should get the map of it soon though, then should have some results to show :seasaw:

When do you think they will be available for sale and how much will they cost please?

Currently, I honestly can't say.

Just because I have a version sitting on my desk, its still a while off before anything can be decided upon when and how much as there is still much more work and testing to be done.

Kev and I are working on this and will hopefully have something sorted in due course.

It's nice to see some interest though!

Come to think about it Kev, might it be an idea to see what interest there is?
Does seem a little daft to put all this work into something only to find there's no interest.
Food for thought anyway.

Well you can count me as interested

Nigel, as per the emails exchanged between you and Kev, (in carbon copy to me) this subject I must tell you, is for review. Please also note that even Kev prefers to consult with me when something is officially sold through my forum. After all as the owner of the forum I am directly to answer for customer's satisfaction because if anything goes wrong the public expects me to put it right, so as you see I have the final saying in this.

Pretty much anyone who sells stuff through xt660.com will have to see me first. Please let's not advertise a product which has not yet been approved.

Speak to Kev in private, he will keep me closely adviced with developments.

Thanks

I would need to test the mod throughly on my bike & be happy with the results before they are to be sold. The results of not testing the mod correctly could result in bikes over heating, I am sure we don't want that.

I normally do all my testing for a few weeks before going public with any of my mods, but this one has got out of the bag early. So be a little patient & watch as this mod developes.

Nigel when you have the final mod please send it to me for testing.

Add your name below if you are interested in this mod.
1/
2/
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4/

me me me

Add your name below if you are interested in this mod.
1/richard
2/paul curtis
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__________________

Add your name below if you are interested in this mod.
1/richard
2/paul curtis
3/Johnny Dangerously
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Map:

dazmatic 23-8-10 mod after.pvm

Stage 2
CCC Rounds, Full length with baffles
PCV
Autotune

That's also with 12.8-1 with low-med throttle low-mid range, 13-1 med throttle mid range, and 13.2-1 WOT top range.

That's also from a Zero'd map as well, no base map was loaded.

Wow, great stuff!

I will definitely be interested eventually, as soon as I get myself a PCIII.

Any news on the eliminator yet please ??

Will be on my bike tomorrow & tested on the dyno on the 27th. We are still working on a better way to run the fans.

Dynojets Emulator is close hopefully, as some of the UK's dynojet dealers have been given the pricing on the Emulator.

Thanks Kev thats good news

Very positive news Kev...this will be real progress.....

Very good, im looking forward to the results!

Like I say, I have one on my bike and it runs like an absolute dream, very keen to see what the dyno results are like though as thats a true tell tale sign of how it runs.

Also very keen to see what Dynojets solution is.

Any more news yet please

It was tested on Monday on the dyno, I could fully map my 09 XTX with an 11 ECU with the O2 still connected. I did 140 miles today & it felt great, no surging at all.

So I can now say we have a mod that can turn off the O2 sensor that stops these XT's from surging, 2 years of hard work.

I have changed the design 5 times over this past month making the mod smaller & smaller. I am waiting for some more sensors to arrive from over seas before I decide on which version I release. I hope to have this mod made up with only 2 wires for easy fitment which will connect directly to the cooling system with coolant running through it, there will be no connection to O2 sensor or wiring for the O2 sensor.

So hopefully by this time next month I can say who wants one.

wow.....ok Cleverclogs......beat the Rev Limiter too !!!!
Good Work !!:coolsmiley:

...err ok !

Can I be the first "official" customer?

Put me down for one. plus I am delaying a dyno run for this mod....

Don't think I will be making that mod, far more complex to do.:seasaw:

Also I only know of 3 XT riders that want this mod.

ONLY 3 OTHERS.....WHAT'S UP WITH THE REST OF YOU?????

I've already got mine :loser:

It's nice to see the dyno runs proving it works though. Was a little concerned about it retarding the ignition timing because of it but by the looks of it, it hasn't.

Some good work going on here all around!

Also, personally, I'd love this bike to rev higher, feels like im riding a diesel sometimes with the low limit.

If I had a spare ECU and the time I'd probably look into it a little more, still probably way out of my league but if there was an ECU cheap and circuit diagrams it'd certainly make an interesting project for someone.

I don't understand the lack of interest most people on the forum have had a moan about the surging and when a mod comes out to cure it nobody wants one