Changes on 2015 efi Klx 250s....
#12
Spadey99, know that you'll get some "opinions" on here that are "less than informed".. We have members overseas that know the recipe for easily modding your engine for 25 hp - and that is a difference like "night and day" - it's almost like getting a whole new "bigger" bike.. These members know this because they've done it and they ride it.. Thier advice is "good as gold"... Your problem is that this thread may not get thier attention - Start a new thread titled like - "2015 EFI engine mod advice"... And look for the guys that are "living it" from overseas..
#13
Buy a programmer for it? EJK makes one.
O2 sensor helps the efi adjust itself. It's only partially for emissions in a way. I believe the elimator will "trick" it into running as rich as it can.
I would believe Kawasaki intended the o2 sensor to be there?
I haven't messed with efi very in depth other than slapping a programmer on my rancher and rzr when I added aftermarket exhausts and intakes.
O2 sensor helps the efi adjust itself. It's only partially for emissions in a way. I believe the elimator will "trick" it into running as rich as it can.
I would believe Kawasaki intended the o2 sensor to be there?
I haven't messed with efi very in depth other than slapping a programmer on my rancher and rzr when I added aftermarket exhausts and intakes.
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.
#14
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...
#15
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!
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!
#16
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!
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!
Will look into one
#17
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...
#18
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.
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.
#19
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.
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.
So even leave the snorkel in??? I have removed snorkel but left lid on...
So pop snorkel back in???
#20
Yep snorkel back in! It's just making your AFR leaner & engine run hotter unless you add more fuel into the mix.