I'd be happy to, and do speak German.
The issue is, BMW simply doesn't field
such questions. You're lucky to get any
response on anything, outside of their
chosen channel of the dealer network.
Just not going to happen, unless one has
some insider's ear.

regards
roger

Good point, Roger (although it seems that even the dealers get the silent treatment, on occasion...)
Now - who's real chummy with a Certified BMW dealer?

Hi,

Too true. I am chummy with a dealer, and I don't think I've ever heard them crow about how much extra info they get over JohnQPublic. On the contrary, they're usually pretty annoyed.

Later
Roger

I have carried out much experimentation with the cat code plug and connected it in all the various possible combinations. From my experience the bike certainly runs best with no plug fitted at all.

From what I can make out the code plug affects the way in which the Motronic deals with the information from the exhaust oxygen sensor and is most apparent on a feathered throttle where the sensor is being read. The sensor tells the motronic how rich or weak the mixture is and the surging is caused by the sensor hunting for the perfect balance. The perfect balance is determined by which cat code plug it has in, which is in turn determined by engine version and country of use.

Andrew I just pulled this from your web site.

http://mysite.freeserve.com/captainstempynet/wiring.gif

It sure would be nice to know what each connection does.

RB

In the RS world, where I now tend to reside :D, the biggest thing is to remove the CCP and put in the pink one from the GS. And now BMW is even prescribing that for their R1150RSs that are having similar problems -- they either swap in the RT CCP or GS CPP, not sure.

I have yet to do this, it's a winter project for me as soon as I can remove the bike from under the snow. :)

i think the rs and rt would be the same spec, and the service bulletin fix for the rt is the olive ccp.

i was working on an aust delivery late '01 bike today and it had a yellow ccp fitted. i think i remember pre delivering this bike, and that it felt stronger in the mid range than i expected. up to 5,000 rpm anyway.

brad

High Noon at the O.K. Corral
 

The "cat-code conundrum"... To pull or not to pull, that is the question.

As readers will remember, I pulled my cat-code plug after reading several posts on this board in pursuit of a smoother (less or no surge at all) engine. What I found was a smoother, surge free, no abrupt shout off during low throttle impute, engine. What I was unsure about was my "top end" and "midrange" performance.
Dr.Curve (A.K.A. Jim Roche) was also very curious about the removal of my cat-code plug. He and I met today for a "real world" comparison. When I say "real world" I phrase it because while Jim and I have access to many hundreds of miles of undulating, curvaceous, desolate road, many do not. Our "real world" is perhaps a bit different from yours.
We are lucky to have many N. Florida, S. Georgia roads that are idea for high speed riding. Unspoiled by development and progress, these roads wind for miles and miles with plenty of visibility far off the roadway.
We set out, each on our own bikes, and had a good warm up. After which we traded bikes. Jim's bike, in comparison to mine "felt" weaker in the midrange and may have been, but only slightly.
We did several 4th to 6th and 5th to sixth roll ons, each very comparable. The telling test was the 5th to 6th to "top" roll on that we made on the long "sod farm straight". We started in 5th at 4500 rpm and ran the bikes side by side. Each of us shifting at 7900-8000 rpm to 6th. Jim was slightly ahead at the start as he initiated the roll on but we were never more than a bike, bike and half-length apart. We ran until we were out of "safe road". Jim saw an indicated 143 and I, 141-142 mph. It was a windy day. Usually this straight bears 144+ from these bikes.
Jim's bike is a '99 S with approx. 20,000 miles and mine is a 2001 with approx. 12,000 miles.
Jim had thought that with out the cat-code plug in place, my bike would suffer on the top end. Indeed it did not.
What may be an issue is fuel range. I saw my green fuel light come on at 98 miles. Granted I spent much of the tank full at triple digit speeds chasing Jim. Still, I would have guessed a better range than this. I will be monitoring this under more "normal" circumstances and I will reply later.
In the short term however, if you have removed you cat-code plug in search of a smoother engine you can rest assured that you will not suffer any shortage on your top end.

So what your trying to say is that the bike moves forward with or without the cat code Plug? Thats nice.

CCP Removal
 

I removed my CCP and about the only difference I can ascertain is that the abrupt off throttle shut off is SLIGHTLY less than what it was before ('01 with 18,000 kilometres), and it still nicely backfires on the off throttle :eek: (Lennies InDuct, StainTunes and matched FIM Chip).

Tom.

Hey gang;


It my sound stupid but where is this cat code plug


EZ

While your sitting on the bike its on the left side fuse box array under the left side blinker. It's the yellow plug. I've had mine out for a year now. No problemo.
.
It says: Warning: you will not be able to keep up with Dr. Curve if removed.

Hey pdonnell,
There is a chat room somewhere that needs your inane commentary more. I assure you.

Derry,
First of all I need to apologize as I didn't know there was anything inane about the S moving forward with or without the CC plug or responding to its location. But frankly giving subjective commentary about its seat of the pants affects is as credible as discussing the psychological effects of placebos in curing people. The fact that no one here has any definitive commentary can itself make any seat of the pants commentary inane.
.
He knows many more things about BMW bikes than me or you but it would be interesting to see what Jim Roche has to say on the subject. He was there with you that day? Maybe no commentary from him is saying something of what he, you or the rest of us know on the subject.
.
But my belief is that this topic is "glass half full or half empty". My particular experience with the CC Plug is that there wasn't any difference. It would be nice for BMWAG to chime in here but until then I think the glass is half full.
.
...off to my bedroom for timeout....

Pat, now I am confused, I thought originally you were advising to remove it? :confused:

Tom.

When Brad sent me his FIM chip earlier this year he advised removal of the CC Plug. Something having to do with the mapping on the chip. Prior to that I had it in and had it out to see what differences (if any) there was. I didn't experience any though and left it in. Since the FIM install the plug has been out. I seem to recall though in Australia your bikes do not come shipped with a CC plug, is this true?

previous comments
 

i thought the FIM ship was unaffected by any CCP, removal, etc. from a previous set of comments (this is from memory recal so may not be entirely accurate) FIM chips have the same selection of maps across the board oor something to that affect. where as the BBPower chip is set up to change maps 1-6, with one map being stock. i guess what i am wondering is if Brad recommended removing the CCP, what was the thoguth behind that recommendation? I have been running a 2002 SBX with induct, k&n, staintunes and FIM chip to match. the bike is without a doubt a better bike. between sensory satisfaction and overall riding enjoyment, what else could be doen to the bike...i stand corrected, 12:1 compression pistons, balancing, etc...only a few more thousand dollars too ;)
as lenghty as this thread is getting, does anyone know all the color CCP options, what they do and can verify if there is a country variant of the S delivered without a CCP? if so are these countries fuel sources of higher quality than ours in the US? I have not had anythign higher than 94 octane in the S to date, I dad have an opportunity to run 99 octane in my 916 on a track and the ride home. while the duc didnt have a cat, only a stage 1 chip, it certainly acted like it was on steriods. and the smell...who cares if it cancerous, the wonderful fumes that roll out of paddocks is intoxicating. okay off on a tangent. hope someone has the answers.
repoe3

Okay guys , I'm a techno idiot. I'm following this with great interest 'cause I hate the abrupt cutoff of fuel at low rpms. It seems like pulling theplug out will help. I ride the '99 US model, if i have the yellow plug does its removal apply to my model? Also what does open and closed loop refer to?

Tom
'99R1100SA
'87R80RT(simple but effective)

Pat,

Mine came with the yellow plug. I believe Brad's didn't have a plug when he got his, but his may have been second hand.

repoe3,

I use Shell Optimax which is 98 octane, isn't this in the US yet?

Tom.

mine didn't ever have a plug. i told pat to pull the one on his bike due to the fact that the chip he got was a development one, and we weren't sure if it had the fim map on all 8. that's all. i have seen some out here with yellow plugs, but only a couple.

brad