I plugged the fresh air hose in hopes the 3,500 rpm bang would go away.
I didn't get much chance to test but the bang is still there, though it might be a little quieter than it was(?). Other than that, the general decel' popping quieted down noticably.
Does anyone know why this bike does this at that specific rpm?

plugged the fresh air hose in hopes the 3,500 rpm bang would go away.

Big subject. Short version, the fuel shuts off on de cell. When fuel comes back on at 3,500 or so = Bang. This is normal. And Sucks.

Plugging the hose did absolutely nothing to decrease my popping. I'm working on Kruz's idea of richening up the fuel in lowest TP positions and higher RPMs after a let off.

Big subject. Short version

On the hard setting, there is a fuel setting that will stop the flow of gas only for a moment. You don't even feel it on lift. The soft setting or the analog keeps this setting open so there is more a smooth transition like drive-ability.

You know the hard set is more abrupt and twitchy when it comes back on say. There is no way the fuel stops flowing on decel per say. Say you hit the kill switch every time you lift and turn it back on when you accelerate. See, that is no fuel on lift. Now, think plain old carb still sucking air and fuel under a closed throttle slide and you know that transition back on the throttle is more linear smooth with the gas always running at any rpm... sans you set the hard cut or say this is the backup setting for that spit second it stops.

Now, act like you are two molecules of different air temperatures. Say you act the, clouds, bath bubbles, a micro wave moving is about to move something that came in from the other side is the air outside. The tail pipe end is letting air into that vacuum made on lift. It is now cold air being sucked into the pipe, filling void called, back-[in] pressure. So goes back in the one end is one cloud of atmosphere. Coming out the exhaust valve is hot momma we gonna get a rain storm is thunder clap newman is hey man, you can't stop the pop is to have both live in the same air temp coming in at the pipe-is equal pressure-no air pop is pop goes the weezell till that engine turns off, stops the pop in the short stack gear your wheelie act.

Kruz's idea of richening up the fuel in lowest TP positions

YOU MURDERERS!

"Hub
Kruz's idea of richening up the fuel in lowest TP positions

YOU MURDERERS!"

:) done.. accomplished, but death still has yet to come.

I'm sure mapping and pipe has a lot to do with precisely how much the bike pops. I blocked my hose and it DID reduce the popping but it didn't stop it from happening all together.

Dare I say...Ivan's TRE-006(flies out)...you lose your gear indicator...bike stuck in neutral...no fuel cut...smooth off/on throttle response at any rpm...absolutely no backfire...

Waiting...give it to me Hubster...

Dare I say...Ivan's TRE-006(flies out)...you lose your gear indicator...bike stuck in neutral...no fuel cut...smooth off/on throttle response at any rpm...absolutely no backfire...

Waiting...give it to me Hubster...

I've been saying that for four years now cycle Junkie but no one listens so I gave up. I just got one for the ZX-10, supposed to disable the KIMS traction control system and do the same stuff it does for the 14, no popping, smmoother off-on throttle transitions etc.

Plugging the hose did absolutely nothing to decrease my popping. I'm working on Kruz's idea of richening up the fuel in lowest TP positions and higher RPMs after a let off.

I haven't personally tried it, hadn't needed to with the 006a on there but I have heard of others who have and liked it. Let us now how that works out and what percent fuel you're adding and at what TP to get the desired effects. I think you're on the right track here, essentially doing the same thing the 006a does.

BTW, I'm running the Fuel Moto map on my CBR after going to a full system. I was getting afterfire all winter long on lift throttle when I upshifted using this map. I noticed yesterday with the air temps back up in the 70s she's not popping anymore, sounded like my 14 on the overrun, kinda of a nice burble. My theory is the decreased air density at the higher temps is just enough to fatten the mix and prevent the afterburn.

* Last updated by: Kruz on 3/15/2010 @ 7:50 AM *

CJ, Oh you're gonna get it! If I were you, I'd self punish oneself; Go to bed without dinner and turn the monitor off all night.

Waiting...give it to me Hubster...

Check the beauty of FI and how complicated the steps are you see the jerking fuel/ign trim going on in more than one combination = THE TWITCH!

Fuel cut-off during deceleration

"The fuel cut-off during deceleration is of the adapted type. When the throttle is closed and the r.p.m. exceeds 1,700 (for engine speeds lower than 1,700 r.p.m., the cut-off function is not operative in order that an optimal drive-ability can be maintained) the injection of fuel is disactivated. If the supply is interrupted, the r.p.m. will start to fall more or less quickly in relation to vehicle conditions. Before reaching idle speed, the dynamics of the fall in r.p.m. is checked. If this exceeds a certain value, the fuel supply system is partially reactivated on the basis of a logic which envisages the "soft accompaniment" of the engine at idle speed. When this condition has been reached, the normal functions at idle speed are reactivated and cut-out during deceleration will only be reactivated if the fuel cut-off threshold is exceeded to prevent the engine from jerking. The reactivation thresholds for the fuel supply and cut-off vary in relation to engine temperature. Another fuel cut-off logic has been developed within the control unit which intervenes during partial deceleration, ie. when a lower engine load is requested. The function is only activated if the new conditions last for a set period of time and after the ignition angle has been adapted to the new situation."

And if you run, fat rich, she puddles in; not mist in being the magic. So lean she goes you puddle up. Think about it.

Maybe I can install some exhaust flaps like those big diesels? Naw. Just kidding. Guess I just have to live with it. Keep feathering the throttle a tad.
Thanks for the replies. I didn't get any thread notifications to know there were any.

"The fuel cut-off during deceleration is of the adapted type. When the throttle is closed and the r.p.m. exceeds 1,700 (for engine speeds lower than 1,700 r.p.m., the cut-off function is not operative in order that an optimal drive-ability can be maintained) the injection of fuel is disactivated. If the supply is interrupted, the r.p.m. will start to fall more or less quickly in relation to vehicle conditions. Before reaching idle speed, the dynamics of the fall in r.p.m. is checked. If this exceeds a certain value, the fuel supply system is partially reactivated on the basis of a logic which envisages the "soft accompaniment" of the engine at idle speed. When this condition has been reached, the normal functions at idle speed are reactivated and cut-out during deceleration will only be reactivated if the fuel cut-off threshold is exceeded to prevent the engine from jerking. The reactivation thresholds for the fuel supply and cut-off vary in relation to engine temperature. Another fuel cut-off logic has been developed within the control unit which intervenes during partial deceleration, ie. when a lower engine load is requested. The function is only activated if the new conditions last for a set period of time and after the ignition angle has been adapted to the new situation."

Hub did you write this? I actually understood all of that..... whatever you're doing with your meds, keep it up!

This is very noticeable on my CBR, better now with the Power Commander on there but the throttle is still a little twitchy compared to my 14. Hate to bring it up again but that blasted TRE makes the shifting much smoother and takes the twitchiness out of small throttle corrections when cruising. Also knocks out the pops.....kind of hard to beat a deal like that. Hub did you finger out the ohms on that nuetral locker?