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!