Need help with fixing decel popping


4 replies to this topic
  • Nathh

Posted August 31, 2016 - 03:32 AM

#1

Hey guys,

 

I've posted about this before on here and got some good suggestions but I'm still in need of some help.

Some background, I have a 2012 WR450F, with a full akrapovic exhaust system (spark arrestor/baffle removed), and the issue is that whenever i close the throttle the bike makes an annoying popping sound pretty much until in come to a stop or turn the throttle on again.

 

Now someone suggested to adjust the idle fuel cause it sounds like a lean condition, so I went and bought the $150 FI diagnostic tool (not the GYTR tuner) and adjusted the CO level. I tried everything even went to the maximum +30 CO level and it still popped on decel, and i even went the other way down to -15 and no change.

 

I've also checked all the exhaust connections and they're fine, pulled the entire thing apart and put it back together.

 

I'm at a loss as to what to do at this point, any suggestions would be great. I would have just put the stock exhaust back on by now but I don't have it cause the guy I bought the bike from didn't have it, go figure.



  • Ka0sX

Posted August 31, 2016 - 03:50 AM

#2

What Map are you running?

 

If you are in the minus setting raise them by 1 until 

 

I had same issue with the yz450 2014 i had if i went to low with the gytr tuner setting it would pop



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  • Nathh

Posted August 31, 2016 - 04:03 AM

#3

Running one of the FMF maps, most of the fuel values on the map are +3 or +4.



  • jimmym

Posted August 31, 2016 - 07:18 AM

#4

Did you replace the header crush gasket when you put on the new exhaust?

  • Nathh

Posted August 31, 2016 - 02:13 PM

#5

Not sure if it was replaced, the exhaust was on there when i got the bike, ill buy a new one and see if it changes anything.

 

thanks for the suggestion.






 
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