O2 Sensor....

I am about to fit a PCIII to my 07 and was wondering about the function of the O2 sensor? Does the 07 R1 have closed loop fueling capabilities for part throttle? If so then a power commander will only serve a purpose for the full throttle line, as the ecu would correct any modifications made be the PCIII in the part throttle area's. I am at a loss to think of what else an O2 sensor could be used for. Thoughts, anyone?

disconnecting the o2 sensor would help to let the pc3 do it's job. does that make sense. thats what I was told by Taige at Graves motorsports.

Yes it would make sense as long as it didn't flag an error in the diagnostics.

I am also in interested in this topic. I searched for a MAP for my Akrapovics and the ones I found were for European bikes with the O2 sensor disconnected. This leads me to believe it should be disconnected Hopefully someone can shed some light on this.

I had mine disconnected for 650kms,no problems no error flags

I have two quick question for you guys. 1, I dont have a PC3 yet, would uplugging the O2 sensor effect A/F to where it would be unhealty for the engine? 2, where would I unplug the other end of the O2 sensor, can't see where it connects? Advice would be appreciated.

First question can't say for sure,but if you lift the tank the connecter is right there,then you can pull it out

Yes. Taige told me the same thing. Disconnect the O2 sensor. I'm want to get into the ECU though. Anyone have the software and computer hookup? I found the race ECU at this website: http://www.yamaha-racingparts.com/r1/ however, you will notice this is overseas. Anyway, the stock ecu is extremely restrictive.

Sorry. The race ecu is on the yamaha site for $650. It seems like this would be a better option than the PCIII and ignition module. What do you think?

must use racing harness with racing ecu. no lights, no signals, etc. no pass inspection.

Figures. http://www.r1-forum.com/forums/images/smilies/angry.gif :mad: Anyone know how to just get the computer connection and software for the ECU?

does anyone have a map for Akra Evo 2 Full System 07 R1. I disconnected my 02 and my engine began knocking

oh by the way, I read Graves installation of their full system and they also have u reinstall 02 sensor

oh by the way, I read Graves installation of their full system and they also have u reinstall 02 sensor I brought this up to Taige and this was his reply: (1) It is true we recommend removing the sensor. On the 2007 you can disconnect the entire piece and remove it from the bike and it should not throw a code. (2) Since the powercommander is now a linear map direct to the injectors you do not need the retime adjustment of the ECU. The only time you would need the sensor is if you are running a Dynojet Wideband commander in which you will be making on the fly adjustments. Besides that remove the sensor. We say to install it because that is factory OEM way to do it and good for instructions but not necessary. Thanks, Taige

I brought this up to Taige and this was his reply: (1) It is true we recommend removing the sensor. On the 2007 you can disconnect the entire piece and remove it from the bike and it should not throw a code. (2) Since the powercommander is now a linear map direct to the injectors you do not need the retime adjustment of the ECU. The only time you would need the sensor is if you are running a Dynojet Wideband commander in which you will be making on the fly adjustments. Besides that remove the sensor. We say to install it because that is factory OEM way to do it and good for instructions but not necessary. Thanks, Taige That´s what i´ve heard too. I´m goin to disconnect the sensor when i get the custom map done.

I left the o2 on my 07 although I have a akrap full system and a PCIII, I made settings on a dyno with the o2sensor disconnected map...The mechanic told me it will still help a bit cos we have very hot weather and can still adjust that 5% more or less fuel when needed.

Most PC maps recommend disconnecting the O2 sensor so it doesnt clash with the PCIII. The PC will be trying to richen it up for better power and the O2 sensore will be trying to lean it out for better emmissions. Thats really all its there for. Any good dyno centre should be able to tune your bike to run well under all conditions in closed loop mode. Stock bikes tend to run rich when you disconnect the sensor as the ECU thinks its failed and goes into safe mode...

I'm really confused about the function of the O2-sensor on the R1. The status code for O2 in diagmode is 24, my bike doesn't even have it in the menu, it have an O2 sensor though. If i disconnect the O2 sensor in a car i will receive FI-light, fault codes and it probably would go into limp mode, the engine wouldn't perform well, do the same om the R1 and nothing seem to happen it obviously isn't rated an important problem since it's okej to start and drive the engine without any restrictions or warning from the management system. Really, how important is the O2 sensor on the R1? I suspect it's influence could have something to do with the "stalling issues " i experienced with both -07 R1s i've driven during the passed week, on one they even changed both *trottle pos sensors* whithout any improvement. The engine seem to start and run fine without the O2 sensor connected, i even think the idle is steadier however, can it be harmful to the engine to drive without it? Edit: disconnecting the O2 sensor didn't cure the engine stalling, didn't change any thing else ither(?)

anyone can post a pic. wanted to disconnect my o2 sensor but sorry for being a noob where is it exactly anyone can post a pic pls it would be highly appreciated.

The 02 Sensor on an 07R1 only makes very small adjustments at a steady speed , example would be while riding down the highway at 60 mph for a few minutes.... under normal riding the 02 sensor never comes into play. This is why removing it is not an issue. It is not a closed loop system that would normally adjust the system all the time. I removed mine as well after talking to Dan Kyle about this and how it all works.

anyone can post a pic. wanted to disconnect my o2 sensor but sorry for being a noob where is it exactly anyone can post a pic pls it would be highly appreciated. You only want to remove it if you have installed a full system on the bike... :)

The 02 Sensor on an 07R1 only makes very small adjustments at a steady speed , example would be while riding down the highway at 60 mph for a few minutes.... under normal riding the 02 sensor never comes into play. This is why removing it is not an issue. It is not a closed loop system that would normally adjust the system all the time. I removed mine as well after talking to Dan Kyle about this and how it all works. sir R1lover pls post some pics from asia here and my pc3 will be arriving soon... my dilemma is that theres no dyno here in my country trhat specifically caters to sportsbike (too bad :mad: ) and already found an custom map for all my upgrades except that it indicates there that i need to disconnec my o2 sensor... sir pls help where the o2 sensor is so that i can try to disconnect it and see if the map i got would be ok for my mods thanks :bow

Teh 02 sensor would make no difference if it's in or out.... the people that are saying this do not understand how this 02 sensor operates on the R1...... If you feel better taking it out, then go for it.... Like I said follow the wire up from the 02 sensor (in the exhaust under the left footpeg) up under the tank. Unbolt and lift up the rear of the tank and you will see the plugin... remove it from there.

thanks now its all clear. thank you:thumbup

Guys, this has been very helpful as I have been wondering about the 02 sensor myself. I'm waiting for a P.C. to arrive and have looked at the fitting instructions and it makes no reference to removing the O2 yet ALL the maps for Euro bikes state that is is removed. Hmmm. Think I'll fit the P.C. when it comes and run it with O2 Sensor connected and then try removing it to compare. A Yamaha trained Tech. told me that it only operates at a constant throttle , i.e. Cruising, so I doubt it will have any effect either way but we'll have to wait and see. Does anyone have a map for an all but stock bike with the race-baffles only for the 07? Ride Safe......

Guys, this has been very helpful as I have been wondering about the 02 sensor myself. I'm waiting for a P.C. to arrive and have looked at the fitting instructions and it makes no reference to removing the O2 yet ALL the maps for Euro bikes state that is is removed. Hmmm. Think I'll fit the P.C. when it comes and run it with O2 Sensor connected and then try removing it to compare. A Yamaha trained Tech. told me that it only operates at a constant throttle , i.e. Cruising, so I doubt it will have any effect either way but we'll have to wait and see. Does anyone have a map for an all but stock bike with the race-baffles only for the 07? Ride Safe...... That info is true..... and you will most likely never be able to tell the difference.

I have had my R1 with PC and custom Map with a disconnected o2 sendor for some time now. Today after a high speed long run it through code 24 and the engine light. Has anyone elso got the O2 sensor code? Do I hook it up to get rid of the engine light and then disconnect it again?

I removed mine as soon as I got my system and have never had an CIL. It doesn't matter whether or not the sensor's in, its going to run the same. I just unhooked mine because thats what Grave's told me to do with there map.

I had mine disconnected for 650kms,no problems no error flags You disconnected it from under the fuel tank I guess? or just removed it from the exhaust and left the wire attached?

I just disconnected it from under the tank? so it is still there. Has anyone ever gotten the code? (24).

I removed mine before having my bike custom mapped. I Had to ride it to the dyno the next morning, no codes, did not run noticeably different and it was in the 40's with crisp air. I originally used the dynojet map for my mods. Before disconnecting the o2 sensor (as others posted) I called dynojet and they told me to remove it before mapping. The bike made 170rwhp / 164rwhp SAE corrected well worth the money and time. Bike pulls a lot smother.

does anyone have a map for Akra Evo 2 Full System 07 R1. I disconnected my 02 and my engine began knocking You can find it on the Power Commander website. I had it but it got erased when we had to redo our computer. I just put in a KR Tuned full system and used the Akra map for a little bit and left the O2 sensor out, but forgot to actually unplug it. It ran really strong. Then KR Tuned sent me a map for their exhaust, and it felt a little better, but this was still with the O2 sensor still plugged in, but not in the exhaust. After a few days, my bike didn't seem like it had the same power, and I noticed my fuel economy went to shit, and then I remembered I didn't unplug the O2 sensor, so it was still getting readings from the air. So I just finally did that a couple days ago, and it feels like the power came back, and I haven't had any lights come on in the dash, so I'm sure it's fine. This is on an 07 too.

hey anyone know how to disconnect it?

hey anyone know how to disconnect it? Just look at the color of the wires, I think they are one blue, one white, and follow it up under the tank and find the same color wires in a small harness and unplug it.

where is the sensor located?

where is the sensor located? The sensor is in the mid-pipe section of the exhaust on the right side of the bike, just below and to the rear of the right rearset (footpeg). It might actually be in the catalytic converter portion of the pipe, but either way, it's below the right rearset.

Just look at the color of the wires, I think they are one blue, one white, and follow it up under the tank and find the same color wires in a small harness and unplug it. How do you disconnect the harness? I have screwed with this thing for about an hour and a half. Are there 2 locks? One on each side of the harness? Could someone please post a picture of the harness disconnected. Damn it would be nice if Yamaha used similar type connectors for each application, you have to learn a new one on every connection.

Maybe someone has a link to a schematic I could look at or a book I could buy? I still am not able to get this thing disconnected. :rant

I'll see if I'll have a chance today to get the tank up and get a pic. I do remember it was stupid looking, and it was damn near impossible to tell where it was supposed to pull apart at.

I'll see if I'll have a chance today to get the tank up and get a pic. I do remember it was stupid looking, and it was damn near impossible to tell where it was supposed to pull apart at. Thank you.

I'll see if I'll have a chance today to get the tank up and get a pic. I do remember it was stupid looking, and it was damn near impossible to tell where it was supposed to pull apart at. I figured it out this evening. Thank you very much. You had to stick your fingernail into the connector and pull up while pulling out. A huge PITA.

I say leave it in. My understanding of the O2 sensor is that it only works when the bike is at a constant throttle position and gear, such as when you're cruising. At this point it will lean the bike out to about 14.? air fuel ratio. The rest of the time it does nothing and the PCIII will do it's thing without interference. Most tuners go for a steady 13.2 AFR I think as this produces the most power. While cruising you don't need any extra power and better fuel economy results. Unless you're racing and need all the power all the time I'd leave it in. These things are thirsty enough at the best of times. Geoffro

+1:)

I say leave it in. My understanding of the O2 sensor is that it only works when the bike is at a constant throttle position and gear, such as when you're cruising. At this point it will lean the bike out to about 14.? air fuel ratio. The rest of the time it does nothing and the PCIII will do it's thing without interference. Most tuners go for a steady 13.2 AFR I think as this produces the most power. While cruising you don't need any extra power and better fuel economy results. Unless you're racing and need all the power all the time I'd leave it in. These things are thirsty enough at the best of times. Geoffro all the way up to the end i was set on takin the damn thing out.lol..i have a full Graves s/s exhaust..will have a PCIII and tuned.... its an 08 if i remove the o2, im removin the whole harness for the o2...Please let me kno the best thing for the bike? would like to put my system on by 2night...Thanks alot guys!!:thumbup

Ok, you guys that are taking the 02 sensor out, what are you doing with the hole in the pipe, just getting a plug to screw in there? Also to ask a question about the full exhaust, does the full exhaust come with a hole for the 02 sensor? If so i'd put a plug in it, and see how it runs, then take it out, see how it runs. Then if you take it to get it dyno do the same and see what results are better and go for it. Either way ride it around before taking it to get it mapped and see if it throws any codes with it in or out with the exhaust you plan on putting on there. If you get a code, with it out, then put it back in and get it mapped like that and just leave it in... Just my $.02

Ok, you guys that are taking the 02 sensor out, what are you doing with the hole in the pipe, just getting a plug to screw in there? Also to ask a question about the full exhaust, does the full exhaust come with a hole for the 02 sensor? If so i'd put a plug in it, and see how it runs, then take it out, see how it runs. Then if you take it to get it dyno do the same and see what results are better and go for it. Either way ride it around before taking it to get it mapped and see if it throws any codes with it in or out with the exhaust you plan on putting on there. If you get a code, with it out, then put it back in and get it mapped like that and just leave it in... Just my $.02The full systems often have a thread for O2 sensor since it's pretty common to connect a broad band sensor to fine tune while running. Ther's special plugs to buy if you want to get rid of the O2 sensor, but you can as well leave the sensor in there. Of course it will restrict the exhaust flow to some degree but it's probably not noticeable, if you not are looking for the last 0.2 HP :thumbup

Ok, you guys that are taking the 02 sensor out, what are you doing with the hole in the pipe, just getting a plug to screw in there? Also to ask a question about the full exhaust, does the full exhaust come with a hole for the 02 sensor? If so i'd put a plug in it, and see how it runs, then take it out, see how it runs. Then if you take it to get it dyno do the same and see what results are better and go for it. Either way ride it around before taking it to get it mapped and see if it throws any codes with it in or out with the exhaust you plan on putting on there. If you get a code, with it out, then put it back in and get it mapped like that and just leave it in... Just my $.02 I got the full stainless Graves exhaust and it has the o2 port, but they sent with it a plug, thats what i did, took the o2, waitin on new header gaskets to put it on

Learnt alot about the sensors function there! Only one question why do Dynojet recommend to disconnect -i thought they might no better!