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Discussion Starter #1 (Edited)
I just spoke with BMW NA about 2 issues;

1.) poor performance during low speed maneauvers

response: BMW is aware of the problem - has had complaints which they've fed back to Germany...anticipates release of a new software version in roughly 4 weeks to address this. They will work to get this available as soon as possible.

2.) backfiring/popping on decel

response: They have not had any complaints about this before.

Possibly an issue unique to my bike?( I am running a laser slip-on with evo air filters)

If you too are experiencing this, can I please ask you to take a few minutes to let them know, so I'm not alone?

Service and Technical Manager 201-307-4261


Thoughts? Comments?
 

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Re: #2

I also get some popping on decel from time to time, it's not consistent though. I happen to have a two brothers slip on. I don't think it's isolated to your bike and I'm sure others have the same issue.
 

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Join the board...

Howdy John,

You might suggest to the BMW NA contact that they join this board and monitor the site.

Here is a link the survey on the "backfire" on the K-R and K-S that would be informative to our friends at BMW NA.

.
 

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sportrider said:
I just spoke with BMW NA about 2 issues;

2.) backfiring/popping on decel

response: They have not had any complaints about this before.

Possibly an issue unique to my bike?( I am running a laser slip-on with evo air filters)

If you too are experiencing this, can I please ask you to take a few minutes to let them know, so I'm not alone?

Thoughts? Comments?
Me too. Much popping on deceleration following the 6.0 upgrade. As you recall, we had some discussion on this last week.
If you run a search of threads by my screen name you may find it and others.
I know I've seen several folks with the exact same issue.
Maybe print all the threads on this topic and send them to you BMW contact.
 

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Aftermarket exhaust?

Just a thought, but I don't have backfiring and popping because I have the STOCK exhaust. I'm curious if anyone with a OEM pipe has the problems you guys have described.

I know the engines are completely different, but when I switched to an aftermarket exhaust on my GS adventure, I had the same problem you guys are experiencing, the popping/backfiring. Same thing happened when I went to different pipes on my Harley.

Since this happened to me with other bikes, I chose to keep the stock exhaust on my KS.
 

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my s back fires and pops like fireworks

everytime all the time on deceleration. But I kind of like it, have a twobrothers tit can no cat on it and it does sound like a motorcycle now. Hate the sewing machine noise BMW's make stock piped.
 

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2005 with Ver 6 and OEM exhaust. It pops. Not disturbing, but it is there. With the upgrade I did get smoother at low RPM's along with the decel pop.

I was happy with the software upgrade until a couple days before the rally. The bike had some type of "Brain Fart" and was choppy at crusing speed. This kept up until I pulled over about 40 miles later then restarted the bike.

I cant wait to hear the service advice, it will be just like calling for computer support, "Did you try to reboot it?" Ahhh, technology.
 

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MadMax said:
Just a thought, but I don't have backfiring and popping because I have the STOCK exhaust. I'm curious if anyone with a OEM pipe has the problems you guys have described.

I know the engines are completely different, but when I switched to an aftermarket exhaust on my GS adventure, I had the same problem you guys are experiencing, the popping/backfiring. Same thing happened when I went to different pipes on my Harley.

Since this happened to me with other bikes, I chose to keep the stock exhaust on my KS.
I have a Remus slip on but I don't buy that as an excuse. I've seen several dozens of Japanese bikes with aftermarket slip on cans and the vast majority don't pop and gargle their way all over town on deceleration.

This must be a fuel mapping issue with the motor. I believe the fuel is not being atomized and combusted efficiently enough before the gases are released into the exhaust system. It could be something else but I don't believe it's directly attributed to the slip on can.
The stock can and catalatic converter is just so restrictive I think it simply catches any unburned gases and/or muffles the sound of whats left.

If the majority of other performance bikes with slip on cans don't have this problem, then BMW should be able to tune their motor and fuel delivery system correctly too.
 

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El_Barto said:
2005 with Ver 6 and OEM exhaust...I was happy with the software upgrade until a couple days before the rally. The bike had some type of "Brain Fart" and was choppy at crusing speed. This kept up until I pulled over about 40 miles later then restarted the bike...
2006 with Ver 6.0 and OEM exhaust, 3800 mi on bike. I had a similar experience two days ago. Description and discussion: http://www.i-bmw.com/showthread.php?t=3119
 

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I kinda like the whole rumbling, minor backfire thingy. As a matter of fact, I am hoping that the new full Ti Remus Exhaust I am planning to install in a week or so will put a little bit more of a pop in it.

I had the same issue with my K12GT and the Z-Tech exhaust system. If you have the throttle slightly cracked open during deceleration, it would do that whole rumbling backfire thing, but if you close it all the way down, it stops. Kinda cool...

The stock system on the "S", although quite a bit quieter, does the ever-so-minor rumbling with the throttle slightly cracked, but no so much fully shut off - just like the GT's Z-Tech. I am imagining that the stock exhaust on the "S" is about 1/2 way between the stock vs. Z-Tech system from the GT (flow-wise). So it would make sense to hear some of that popping.

My question to those of you who are complaining about the popping (please do not take any offense to this, as I mean absolutely none) is why did you buy a high performance sport bike, yet you don't want the high performance sound? Perhaps my bike is not doing it as badly as the others mentioned in this forum, but I like the sound... And I want more! :wtf
 

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Discussion Starter #14
I don't mind collecting threads and giving them to BMW, but I think a personal
phone call from each one of you guys to BMW would go alot further. Please take
5 miinutes and do so...

Let's work together on getting some of these minor issues solved.
The only way that's going to happen is to speak up!

If these two go away for me, I'm a totally satisfied happy camper and will
sing the praises to BMW and may even get "face the power" tattoed on my chest!
:)
 

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I use stock pipe (I love the macho look of it), and non version 6 s/w. It does occasionally produce back fire pops on deceleration but I guess no one here complain because it sounds throaty and cool. As long as it has no negative effect on my engine, and catch cagers attention as a result, I am all for it as I know they will be aware of my presence and not drift into my lane.
 

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06, completely stock. No issues with driveability. Sometimes will not start until I pump the clutch lever and at idle engine make a rolling rattle noise which stops when I engage the clutch. Anyone have any experience with my issues? I would like to have a two bros can but I am wondering if that will create any drivability issues.
 

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sportrider said:
2.) backfiring/popping on decel

response: They have not had any complaints about this before.

Possibly an issue unique to my bike?( I am running a laser slip-on with evo air filters)
Running a remus powercone with BMC filter and version 6 s/w, also get this, I'm in the UK so won't ring them.

Should have said, this is on a KR
 

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For those of us that haven't upgraded our software yet, does it makes sense to avoid doing so given the problems people seem to be having?
 

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Discussion Starter #19
I dunno Mogan...seems to be getting mixed reviews, which for the life of me, I don't understand. My issues began after leaving the parking lot of the dealer
when version 6 was loaded, so I figured everyone would be in the same boat.
My bike began backfiring on decel a block away - hindsight, I should have turned around, went back and said "what's up with the popping?".

However, some people really like version 6, so I just don't get it...

I don't recommend it, but there's people here that think it's better than viagra, so who knows...?
 

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The delimma!

Mogan said:
For those of us that haven't upgraded our software yet, does it makes sense to avoid doing so given the problems people seem to be having?
I feel your pain because I went thru the same conundrum myself. Also, if there is a problem, there is no going back. What to do?

So, last week I did it and it is a real good improvement. I've got about 300 miles of aggressive riding on the 6.0 and can report that the bucking is nearly gone, there are absolutely no flat spots in the rev band and there IS a deceleration "burble" but no where near a backfire. So, thus far...it was worth doing. Some of the "chopping" throttle reports that have been reported after the bike has been on 6.0 for a while and has been hot has not been an issue. Mine has been hot after a long aggressive ride but it was just updated last Wed so long term...don't know yet.

Also, after the 6.0 update, the accessory outlet now shuts off so the charger will no longer work there. It's the same situation as my 06GT. It's not an issue now since I've added a direct to battery plug.

Also, mine is an early 05 and it got three upgrades (5 or 6 were available...relative to bike need). I got the ABS, flat battery and the 6.0. As an FYI, there was a problem with the GT-1 (the installing computer) so it locked up twice during program loading. Third try was the "charm".

From my experience thus far, I'd say go ahead and do it. I do think BMW is trying to get this right and will attempt to solve the problems the best they can. I also think the dealer that you use has a lot to do with how each of the reported problems are handled. Hope you have a good one!

I think it is worth the "risk" to get it updated. FWIW! Good luck.

Doug
 
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