CO2 Sensor Question.

I have a new set of Delkevic headers on the way from the States. I'm assuming that they will not have a thread to attach the CO2 sensor to them. I do not have a Power Commander and was thinking, should I drill a hole and weld a nut onto the Delkevics to accomodate the sensor. Would this work, or has someone come up with a different solution when installing aftermarket headers.

Shuold I install one of these ? http://www.ebay.com.au/itm/NITRO-X-O2-OXYGEN-LAMBDA-SENSOR-ELIMINATOR-FOR-GSX-1250-FA-GSF-1250-650-BANDIT-/370562581991?pt=AU_Motorcycle_Parts_Accessories&hash=item56474045e7

Hammy wrote:I have a new set of Delkevic headers on the way from the States. I'm assuming that they will not have a thread to attach the CO2 sensor to them. I do not have a Power Commander and was thinking, should I drill a hole and weld a nut onto the Delkevics to accomodate the sensor. Would this work, or has someone come up with a different solution when installing aftermarket headers.

Shuold I install one of these ? http://www.ebay.com.au/itm/NITRO-X-O2-OXYGEN-LAMBDA-SENSOR-ELIMINATOR-FOR-GSX-1250-FA-GSF-1250-650-BANDIT-/370562581991?pt=AU_Motorcycle_Parts_Accessories&hash=item56474045e7

Well your going to have to do one or the other. I'd go with the eliminator

madmax wrote:

Hammy wrote:I have a new set of Delkevic headers on the way from the States. I'm assuming that they will not have a thread to attach the CO2 sensor to them. I do not have a Power Commander and was thinking, should I drill a hole and weld a nut onto the Delkevics to accomodate the sensor. Would this work, or has someone come up with a different solution when installing aftermarket headers.

Shuold I install one of these ? http://www.ebay.com.au/itm/NITRO-X-O2-OXYGEN-LAMBDA-SENSOR-ELIMINATOR-FOR-GSX-1250-FA-GSF-1250-650-BANDIT-/370562581991?pt=AU_Motorcycle_Parts_Accessories&hash=item56474045e7

Well your going to have to do one or the other. I'd go with the eliminator

Cheers MM. Thats what I recon. Pretty cheap and easy.. Just wanted to hear any other advice on the matter.

The pics I looked at for the Delkevic header showed the threaded plug for the O2 sensor. Once you have those headers, go for a TFI from Dale Walker. I got 130.8 Hp from a mate's bike with Dale's setup and headers.

kewwig wrote:The pics I looked at for the Delkevic header showed the threaded plug for the O2 sensor. Once you have those headers, go for a TFI from Dale Walker. I got 130.8 Hp from a mate's bike with Dale's setup and headers.

Thanks Kewwig. I have already ordered the O2 eliminater. At that price it is worth a try. Cheers.

I have already installed a set of delkevic headers on my 2012FA. It comes with a hole and nut for the o2 sensor, plus a plug.
I have a thread on two wheeled texans forum. I will add it here later tonight.

Cheers

Classypete wrote:I have already installed a set of delkevic headers on my 2012FA. It comes with a hole and nut for the o2 sensor, plus a plug.
I have a thread on two wheeled texans forum. I will add it here later tonight.

Cheers

That's good to know. I was wondering if the delkevic headers would get too hot for the lower fairing, aren't they single skinned?

The lower fairing should have that silver heat reflective tape stuck on the fairings. If it doesn't I'd recommend you add some just in case. Double skinned wouldn't keep them that much cooler, actually losing the cat means less heat anyway

Thanks, I think the heat tape is there from factory.

Sounds like a plan for the future then

The tracking number I was given tells me that my headers were at the Sydney sorting station yesterday, about 9am. Still waiting for the O2 eliminator to arrive as well. May be a little while to sort out the best way to fit them.

Here are some pics of my delkevic down pipes, and 8" mini can,

And yes, I did have to cut the faring.





I am planning on cleaning it up some more....

Seems the header people and the fairing manufacturers never use the same mule bike, I too had to provide a new "ventalation" hole when I fitted the Arrows on my '07 1250 that has factory lower plastic.

Has the new dash got a temp gauge ? I believe mine now runs a little warmer round town with the headers (even without any Cat). Be interesting to see if there is any difference.

Must say. I quite like the Bandit in the Wedding Dress " White " livery. Very nice. My Delkevic BOX arrived today. So tomorrow morning the tools come out. Delkevic even supply you with a spring puller. I went to the trouble of ordering one. As well they supply a tube of exhaust silicon and a set of header gaskets. Top stuff.

Yep I can confirm what Pete has said that the Delkevic headers have a nut for an O2 sensor, but the hole size is for the O2 sensor that fits the stock pipe. The PCV autotune O2 sensor has a much larger thread so you will need to hack the exsisting nut off and weld on a new nut before you fit the headers.

I've had my Delkevic headers and an 18" CF Delkevic silencer on my GSF 1250 for about 5 weeks now and the bike is running quite bad. Its taken me weeks to sort the fuel map out and I'm still not there.

@classypete. I really don't recommend you touch the airbox or do any mods to it before you fit a PCV, FI Tuner Pro or a TFI from Dale Walker as the Delvevic headers are so free flowing that you might struggle to get enough fuel in to get the correct mixture at higher RPM's and throttle settings. I'm using the FI Tuner Pro and have all the cells over 5000 RPM and above 60% throttle set to the max of 30, and its no where near enough fuel. The bike bogs down after 5000 RPM when you apply over 60% throttle. My options are to put the airbox lid back in place, as I cut it off compleatly and fitted a K&N filter, or to try and get even more fuel in.

At the moment I'm playing with trying to get the bike to stay in the richer mixture that it gives when the engine is cold, or for the first 30 seconds after you start the bike if its hot or cold. When my bike is running that richer cold start mixture it runs fine everywhere and there is no bogging down, but as soon as the bike warms up and the mixture leans out the bogging down starts.

I'll keep you posted to how I get on as there are not many with the Delkevic headers and I might me the first to attemp a full engine tune with them in place.

Rog.

Hmmm... Good luck.... It's always fun being first eh?!...lol

I've got a PC3 arrow headers etc and had no problems. As others have stated check your fuel pump as it sounds like it might not be working as well as it should. Still seems like a coincidence.

I think putting headers on before a decent fuel box is going about it arse backwards. No doubt the bikes' going to run like a bag of shite. Tfi box is the way to go if you're a tight arse like me, or go PCV if you don't mind spending money getting a dyno tune. Once it's sorted, you'll be more than happy with the results so it's worth the hassle IMO.

Ok I see. I have the TFi box and the oxygen sensor has a resistor in place, so I'm not sure if cutting the wire will have the same effect. As far as 4-2-1 vs 4-1 goes, my gut feeling is that it shouldn't produce the fueling issues you described ie. bogging down after 5000 rpm. If anything it should go better up top slightly. Sorry I just noticed you said that your secondaries are in place!? My advice from Dale Walker was that you must remove these if you completely open up the airbox. It's easy enough to do. go to holeshot.com and look at the photos he's got there. Basically you'll need to:

* get a no.0 (number zero) Phillips screwdriver and a microbutane torch.
* remove the throttle bodies from the RHS, leave the throttle cables in place, whack an old towel on the frame and rest the throttle bodies on them. You will have to remove some cables and breather hoses before they are removed.
* carefully heat each screw for 5 seconds with the microbutane torch to crack the threadlocking agent, do one secondary valve at a time, 2 screws per valve then they'll easily come off with the screwdriver. Once removed make sure the retaining secondary valve control rod is in the closed position.
* Whack it back together and see how it goes.


Here are the photos and instructions. If you can get the workshop manual, it will be even clearer. PM me and I can email you a pdf if you can't find it online. I got mine off a torrent site.

http://holeshot.com/Bandit_1250/1250tfi_install_st2.html


Once you get her sorted, she'll be like a different bike altogether. Good luck

Ditto what Geekay said.

I have A very rider friendly 130hp/125nm and my tuner/PCIII has up to minus -10 in the mid range and high as +18 in the higher RPM.

Are you sure you don't have too much fuel?

Sounds a lot like the fuel screen starvation issue. Looking at Barry's PCV map and mine (https://nswbandits.forumotion.net/t3027p15-another-power-commander-question) I see a maximum increase of +20% @ 7500 rpm @ 80% throttle, so I wud agree with Reardo's comment that you should be in the same ballpark.

Of course, if you have the starvation issue then fuel flow will be limited by that so it wont matter what the TFI, PCV or Healtech FI settings are. AFAIK the main difference is that some units don't allow for subtraction of fuel (TFI) and in the case of my bike it was necessary to remove fuel at the low end to get the throttle response right.

Thanks for the replies guys.

Yep, I'm starting to agree with you that the problem is somewhere else now. I looked at Barrys map and I have a map that is almost identical and we run very similar setups, so it has to be something else.

I'm on hoilday untill the end of Feb, but when I get back I'll check the fuel pump filter and remove the secondary butterfiles. I can also put in a 330 ohm resistor which is what the O2 eliminator plug you buy is and see how she goes. But if all is well after the fuel filter clean and secondarys removed I'll leave the rest alone.

Many thanks again and I'll post back with my findings in late Feb.

Rog.