Originally Posted by
ReadyXB
If you have an otherwise healthy engine, the popping is completely normal and not causing any damage. But if it bothers you, there are several ways to "fix" it.
1. One way is to reduce fueling on deceleration. This is the most common method as it will also enhance the engine braking effect. There is a fine line to walk, though, because take away too much fuel and you will get a choppy return when rolling back on the throttle (think going around a curve and rolling on the throttle). You may also notice a bit "rougher" transition between RPMs when cruising at low speeds/throttle, although correcting this is just a matter of finesse. On my own bike, it took several rounds of modification to find the sweet spot. Know that the factory tuned our bikes for the best compromise between driveability and engine braking, so a person will be deviating from that to lessen the popping. I imagine EBR ECMs are tuned for a more aggressive braking effect. In your case you may just need a little more.
There are several ways to reduce the fueling. One is by directly altering the fuel maps for your deceleration zones (ex: no throttle and RPMs above 1350). I suggest data logging if you go this route to be sure you hit the correct cells. Note that "no throttle" does not equate to "no load".
The other is to reduce the "Deceleration Correction" parameter. For example, if it defaults to 96%, try 94%. This Deceleration Correction value is much easier to test and try, but altering the fuel maps gives you the most fine tuning control, if you know what you're doing. Also, there may be a maximum amount of time that the Decel. Correction stays active, even if "decel" is still occurring, though I cannot confirm. In all the logs at my disposal, I haven't observed more than 3.5 - 4 seconds of time but this is due to rider habits for all I know.
2. The other way is to -add- fuel in your deceleration zone (via opposite of the methods listed above), but this method is much more difficult to do properly. Also, you lose most of your engine braking capability and will notice a slower return to idle when the throttle is closed. Not what most people want.
Can your EBR ECM be modified?
FYI: there are a few other engine tuners on the forum. ich has a lot of knowledge if you can catch him.