Calling 08/09 owners, removed the cat? got a pwr cmdr?

[stevekdavis]

I'm interested to know how many people with an 08 or later GS/GSA that have removed the cat either by cutting or replacing the headers have also gone on to install a power commander or whether you've trusted the engine to manage itself.

I fitted some remus headers on my 08 GSA a few weeks back and love the effect. Smoother pickup, sounds great and I have no issues at all. After some recent posts saying it may now be running lean I am concerned and don't want to damage the engine, I may need a power commander or some such device to manage it.

I'm also confused as I thought BMW did offer the Remus headers as an option, if so do they leave the engine mapping alone?

I understand the logic but I still have the stock end can and filter so wanted to gauge some feedback from others. Are you running stock still or did you also add a power commander type device.

I'll try and do this as a poll.

kept as stock
de-cat, stock pipes, no pc
de cat, other pipes, no pc
de-cat, stock pipes, pc
de-cat, other pipes, pc

Thanks

Steve

 

[stevekdavis]

If you're not running a PC or similar device can you tell us how long it's been running like this and have you had any "lean running" issues?

cheers

Steve

 

[stevekdavis]

interesting so far, so if the 08 1200 and on run leaner than older 1200's then there's a few of us who "may" have issues if this is true.

If this is also true then I would expect at least one of you to have had issues already and I don't think you are. So my conclusion so far is not no worry and enjoy riding the damn thing

 

[Pukmeister]

My dealer says a decat is fine providing you don't use a free flowing air filter. If you do, you must fit some form of fuel system adjustment eg techlusion, PC etc.

 

[stevekdavis]

That's definately what I was led to believe when I was looking at the header replacement, just that I've seen a flurry of posts about lean running and pc's wunderlicht boxes etc over that last week or so.

Better safe than sorry so I though I'd ask.

15 responses so far and no one a) uses a power commander/fuel map adjustment and b) reported any problems.

 

[PrayingMantide81]

Im a bit tired of reading "engine will run lean,the 12's run leaner,after cat removal a PC is needed etc"...what does lean mean anyway??I remove my cat an the bike is running great,better at low revs and great after 5k rpm's,if someone indeed had a problem in the future after removing his cat and didn't fit a PC please tell us and maybe then we get to the conclusion that the engin will run lean after the cat is gone!

 

[Ringmaster999]

My 08 GSA now has 13000 miles on it. At about 3500 I fitted Remus headers and also a K+N Filter and it was fantastic. Much more responsive and free flowing. At about 4500 I put on the Remus end can on and run it like that up until last week when I put the standard end can back on. Why! Well I just found it a bit load all the time and it was begining to anoy me. I have found absoulutly no differance in power with the standard can back on only a reduction in exhaust note. I am off to Scotland for a week Friday and have deicided on my return I am going to fit the Keihan headers. I like the look with the balancer pipe at the front and just fancy them. Not in a sexuall way of course. Any way my bike has suffered no ill effects at all during it's 13000 mile life and it's not even a year yet

 

[PrayingMantide81]

My 08 GSA now has 13000 miles on it. At about 3500 I fitted Remus headers and also a K+N Filter and it was fantastic. Much more responsive and free flowing. At about 4500 I put on the Remus end can on and run it like that up until last week when I put the standard end can back on. Why! Well I just found it a bit load all the time and it was begining to anoy me. I have found absoulutly no differance in power with the standard can back on only a reduction in exhaust note. I am off to Scotland for a week Friday and have deicided on my return I am going to fit the Keihan headers. I like the look with the balancer pipe at the front and just fancy them. Not in a sexuall way of course. Any way my bike has suffered no ill effects at all during it's 13000 mile life and it's not even a year yet

Thank you!!And yes it is annoying sometimes if an aftermarket can is on also,my bike with no cat,akro can makes a lot of noise and maybe i put the baffle in for a longer trip,but in town it's kind of fun..!!