2018 KLX 250 Tuner question

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Oct 26, 2019 | 08:03 PM

#11

klx678

Senior Member

Joined: Aug 2009

Posts: 4,650

From: Delaware, Ohio

1st Gear Member

Quote:

Originally Posted by osavip

I tried it with the 02 sensor functioning and the base settings. It ran great. I then tried with the O2 bypass and it also ran great. I’m currently experimenting with the EJK settings with O2 sensor hooked up. Results are excellent. Fuel adjustments are in effect whenever in open loop (when it’s most important) and who knows how much it’s trimming back the fuel when in closed loop? I guess in theory I’m burning slightly less fuel when it goes closed loop...and maybe a little more heat...maybe more decel pop? Overall it’s running great. Last thing I’ll try, once I’m happy with settings, is bypass the O2 again and see if it’s noticeable. I’m not going to do anything with the PAIR valve since it does nothing to performance, just prevents decel pop. Decel pop is not excessive and sounds cool IMO.

Funny thing about that decel crackle - Corvette owners are trying to get it while bike riders are trying to get rid of it. I went to the source of knowledge with carbed bikes on my KLX and found they said it was pretty much normal, closed throttle will cause a lean condition and the lean mix builds up and fires in the header causing the crackle. They state it is normal and no problem. I came across one Corvette forum while researching it for back up of what I already knew. They were asking how to get their exhaust to have more crackle (not big booms, but the run down crackle) like the Corvette racers had. Found that kind of humorous.