Lean Pop, Stock Apex

[Roly]

Put a Hindle muffler on and got rid of the stock muffler, Now at moderate sustained throttle, and at high RPM I'm getting a popping(what I beleive to be a lean miss) sound coming from the exhaust. Do I need to go to logic box or is there a way to recalibrate it.

 

[snow_knight]

programmer would definatly help.. however are you sure its not bouncing the rev limiter?

 

[tard]

If the popping is when you let off the happy switch, add a little ring free into your neaxt tank of gas.

 

[BigFish BC]

make sure you are not hitting the rev limiter now its sounds just like a lean pop a lot of guys have mistaken this befor

 

[Roly]

Absolutely positive it's not the rev limiter, Even though it sounds like a miss is it possible to be rich exhaust ignitting in the can?

 

[HPCrazy]

Nitro does the same thing, probably lean from less backpressure. Control box would be ideal I plan on trying better plugs first.
Here is a question for all the Yammi gearheads.
Can the stock efi/ecu fuel map be adjusted to compensate for the high flow exaust?

 

[BigFish BC]

you can make some adjustments on your gauge but not sure if it will be enough to help you.