Akrapovic on an 08 sensor issue query

I have a K8 Sport myself I have been told my Suzuki dealer the bike will run really poor if you put a full system on the bike.

The ECU is set up for the oxygen sensor in the standard exhaust, If you remove the oxygen sensor if will affect the FI fuel injection system.

Also the FI warning light will come up on the clocks all the time and you will have to get round the problem of removing the fuse from the fuse box for oxygen sensor.

[TSM]

Originally Posted by DarrenSV650S

Isn't the warranty going to be foobarb'd anyway sine he just put a new system on it?

Not realy, well if he leaves the lambda sensor out then its a good case for it as its been a little told thing that having a lambda sensor out of wach can lead to destruction of the CAT as the fueling goes completley out to the point that the CAT cant cope and it dies. So not knowing what the SV does could be a big big problem. But as long as the sensor in in the exhaust path then i find it hard for suzuki to make any complaints.

Originally Posted by lukemillar

I thought closed loop fuelling only applied at small throttle openings/rpm so smooth out the fuelling in those areas? Above that the ECU just reads the map? I know it is a similar case with fitting a full system to the 675, but there are options to disable the 02 sensor when applying the map. If you are fitting a full system, then you would need a remap, so maybe talk to your dyno guy and see if there is anyway to disable the 02 sensor in the ECU

Suzuki ECUs are not as powerfull as the Triumph ECUs, unlinkey to be any options to turn it off. There is not even GUI software that ive seen that is for them.

Originally Posted by SV MAT

I have a K8 Sport myself I have been told my Suzuki dealer the bike will run really poor if you put a full system on the bike.

The ECU is set up for the oxygen sensor in the standard exhaust, If you remove the oxygen sensor if will affect the FI fuel injection system.

Also the FI warning light will come up on the clocks all the time and you will have to get round the problem of removing the fuse from the fuse box for oxygen sensor.

course the engine will run wrong, its got no info from the sensor, it will be running a safe map or a completley wrong fueling

Evening all,

I have good news. I called garage yesterday to say, "ok let's go back to stock" but luckily the guy who's working on it wasn't in. Today he called me and said that the new sensor has a slightly different thread, i'm not sure on the details but basically it can be mounted easier, and they managed to get it to fit ok in the right place. So I get tokeep the exhaust, and have the lambda where it should be!

I'm rather pleased. Ragarding running after getting a new system, I presume it might be a good idea to get it dyno'd... can anything be done to alter these without going power commander type new ecu route? Or will the ecu work it all out itself?

Glad it is all sorted Griffo, what exactly did they do to overcome the issue?

Originally Posted by Griffo

I'm rather pleased. Ragarding running after getting a new system, I presume it might be a good idea to get it dyno'd... can anything be done to alter these without going power commander type new ecu route? Or will the ecu work it all out itself?

The standard ECU can be remapped, this is the way to go with your full system. A PC is an option but it is a lot more expensive and the whole unit is very OTT for a SV650. The SV's with the oxygen sensors can compensate for slip-on exhaust, not full systems as the set up isn't that intelligent.

Thanks Dave, I'll probably take it to JHS then and get that sorted before too long. What sort of symptoms should I expect, it not being remapped?

Regarding what exactly they did, I will find out for you when I pick it up, which may be tomorrow if my brother is excellent. I'm more excited than all those world-ending things that are going to pop out of the LHC!

Originally Posted by Griffo

I have good news. I called garage yesterday to say, "ok let's go back to stock" but luckily the guy who's working on it wasn't in. Today he called me and said that the new sensor has a slightly different thread, i'm not sure on the details but basically it can be mounted easier, and they managed to get it to fit ok in the right place. So I get tokeep the exhaust, and have the lambda where it should be!

I'm rather pleased. Ragarding running after getting a new system, I presume it might be a good idea to get it dyno'd... can anything be done to alter these without going power commander type new ecu route? Or will the ecu work it all out itself?

I'm late to this thread, but the KISS thinking may help others in a similar position.

Originally, the garage wanted to wire in a resistor, but didn't know the value of the resistor to use due to changes made to the K8.

KISS theory: Keep it simple stupid.

Use a potentiometer & just wind it up to the value that works (ie, stops the FI warning light coming on). Get out a DMM, and you know the resistance offered by the potentiometer if you want a more permanent solution.

However, that won't make the ECU vary fuel/oxygen mix dependant on exhaust gas, as you're using a resistor, not a sensor.

Well I got the bike back, and it's running lovely. Seems a lot smoother than before, sounds rather nicer too. All the chap said was they managed to mount the sensor as the thread is in a different position to the k7. I apologise but in my excitement I didn't ask much else
I'll take a photo or two next time I take her out for illustrative purposes.

[jambo]

Originally Posted by Baph

I'm late to this thread, but the KISS thinking may help others in a similar position.

Originally, the garage wanted to wire in a resistor, but didn't know the value of the resistor to use due to changes made to the K8.

KISS theory: Keep it simple stupid.

Use a potentiometer & just wind it up to the value that works (ie, stops the FI warning light coming on). Get out a DMM, and you know the resistance offered by the potentiometer if you want a more permanent solution.

However, that won't make the ECU vary fuel/oxygen mix dependant on exhaust gas, as you're using a resistor, not a sensor.

Or, With the stock exhaust still attached, run the bike up to temp and measure the resistance on the sensor?

Jambo

Late to this thread too, but I was going to add that the exhaust is clearly not a K8 version as confirmed by Akro and those supplying and fitting the exhaust (if one of the same) should give you full warranty for their suply and install.....I hope this is the case. Good Luck with it, I am not jealous at all!