Might be worth dropping joel thailand a PM if he doesn't see this thread.
He seems to be the oracle when it comes to the EFI models

 

Thanks mate received and understood

 

What's very interesting is with my 2010 Husqvarna TE250 (fuel injected), from the factory they are very 'corked up'. When you buy the bike, apparently you get the 'race' kit with it (O2 plug and bung to eliminate the O2 sensor, a 50Tooth rear sprocket). So, everybody that buys one, immediately installs the race kit, and removes the Cat converter from the pipe - apparently they run like crap (very, very lean) from the factory.

The point is that the 'fix' for these bikes is removing the O2 sensor. Doesn't make a lot of sense - normally you'd want the the O2 to feedback to the ECU, but apparently the Husky only installed the O2 to make it pass emissions.

 

Yep, the O2 sensor allows "closed loop" running with precise adjustment of AFR ... It's just unfortunate that factory setups use this feature/capability as a way to run extremely lean AFR's (and catalysts) to pass emissions testing.. We should be able to use it(closed loop operations) to produce max power along with max fuel economy - A PCV (like on my Harley Ultra) allows decel pop fixing, control closed loop AFR target ( only within the range of stock, narrow band, O2 sensors) , control when "open loop" ops begin and all open loop AFR's, and control "accelerator pump" function etc etc... We should also be able to replace the stock narrow band O2 with a wide band O2 sensor and use a PCV to run closed loop over more of the operating range all while targeting a much better(richer) AFR...

 

I have a 2014 EFI and did the KDX snorkel with Q4 exhaust. It was popping a lot and ran super hot. Though keep in mind I live in a hot and humid climate (Taiwan). When I finally bought the EJK kit it fixed the problem for the most part. It still pops on decel from time to time and will pop between shifts occasionally. But the heat issue disappeared for the most part. (Summer here is a different story. Seems there's no cure for stop and go tight city riding. Had the overheating light come on several times)

I would definitely budget for an EJK or similar if you wanna keep that aftermarket can. If you happened to be in the (US) military, EJK has a military discount. Got my controller for $175. Can't beat that!

 

Thanks mate great info.... Obviously I'm In the uk so not very hot anytime lol....
Will look into one

 

Yeah, a little frustrating that Husky designed the O2, it seems, purely for leaning it out to meet emissions. Once you buy it, you install the 'race kit', which includes an O2 eliminator plug. Would be nice if there was just a switch, so it still took feedback from the O2 to get into closed loop. I have a JD Jetting EFI tuner on it - it's pretty basic - probably like the EJK - there are 6 settings - idle, low, mid, high, accel pump and mid-to-high crossover point. I have it strapped to the bars so I can tweak it as I'm riding, although if/once I get it dialed in and don't need to adjust it anymore, I'll likely tuck it in behind the headlight shroud. I also have a dual map switch - the stock ECU has 2 ECU maps (that still work with the JD tuner) - one for dry and one for wet - I usually run the wet map as it seems to give it a little more grunt down low. It's something like 35HP, but the bottom end power is really weak compared to the KLX.

 

You can run the bike without the 02 sensor no problems. It's only there for emissions & is also a crappy narrow band sensor anyway! The expensive wide band sensors is only used with Bazzaz & power commanders autotune etc etc for real time 02 readings.

The 02 eliminator tricks your bike into running at max richness (still not rich enough but better) & well worth fitting.

Don't open your airbox up unless you have some sort of fuel controller (EJK or PCv) to increase AFR. I'm running low 13's across the rev range, with blocked PAIR valve clean air BS & have almost zero decel popping btw.

 

Hi mate good info there...

So even leave the snorkel in??? I have removed snorkel but left lid on...

So pop snorkel back in???

 

Yep snorkel back in! It's just making your AFR leaner & engine run hotter unless you add more fuel into the mix.