KLX250 EFI big bore - is there an actual EFI solution?
#11
292CC Cyl with 260CC/min inj is like original 249Cc cyl coupled with 220CC/min inj, adding free flow exhaust with KDX200 snorkel and a twin air filter and slightly more fueling is needed.
A 2,5kOhm NTC thermistor in series to the original IAT NTC fitted inside the airbox fool the ecu thinking a colder air is actually sucked (near 10°C colder) adding a little more fuel to the mixture (5%).
A 2,5kOhm NTC thermistor in series to the original IAT NTC fitted inside the airbox fool the ecu thinking a colder air is actually sucked (near 10°C colder) adding a little more fuel to the mixture (5%).
Your idea is absolutely brilliant!
Do you have a picture of your installation? If you don't, that's ok as I think I get your idea that the thermistor ~also~ has to be within the airbox along with the original one in order to ~also~ sense the intake air temprature. I'm going to do this just like you did.
Thanks again,
Greg
#12
Thank you so much for responding.
Your idea is absolutely brilliant!
Do you have a picture of your installation? If you don't, that's ok as I think I get your idea that the thermistor ~also~ has to be within the airbox along with the original one in order to ~also~ sense the intake air temprature. I'm going to do this just like you did.
Thanks again,
Greg
Your idea is absolutely brilliant!
Do you have a picture of your installation? If you don't, that's ok as I think I get your idea that the thermistor ~also~ has to be within the airbox along with the original one in order to ~also~ sense the intake air temprature. I'm going to do this just like you did.
Thanks again,
Greg
you are right, NTC must be put in the airbox, i placed mine on the side before air filter, it's fitted through a drilled 5mm hole then sealed with RTV silicone.
#13
The closest Thermistor I can find is 2K OHM. It's nicely encapsulated and has leads on it. Would that work? Do you know what percentage mixture richening that would yield?
#14
It will give a slightly less enriching , nothing to worry about.
#15
#17
Why not use an adjustable 5ohm unit?
https://www.mouser.com/new/bourns/bo...ters/#Bullet-2
https://www.mouser.com/new/bourns/bo...ters/#Bullet-2
Since I already bought the thermistor I'm going that route as it adjusts for intake air temperature.