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ianp5uk

Joined:

Aug 07

Posts: 45

ianp5uk says:

R1200GS pep up

I have an old 2004 BMW R1200GS. Recently I had a test ride on the latest model which was a lot peppier to ride and felt much better for it. Having established that I am too weak willed to go against my missus and spend the savings on a new bike I began wondering if I could stealthily improve my current bike. What I had in mind was a K&N filter, de-cat it and run a freer flowing end can. If I do this will the ecu on this model automatically adjust the fuelling (It has Lamda sensors) or will it run too lean? I.e. will I need to spend another couple of hundred quid on mapping.


Thanks

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  • Posted 2 years ago (20 July 2012 09:45)

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jaffa90

Joined:

Mar 09

Posts: 8609

jaffa90 says:

pep up

Don`t know but before spending money has the bike been serviced as in checking valve clearances and maybe a compression test?

Also you may have a back pressure regulator in your exhaust:unsure:not working properly.

Was the test bike water/liquid cooled or air/oil cooled as yours? 

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ianp5uk

Joined:

Aug 07

Posts: 45

ianp5uk says:

R1200GS pep up

Yes it is serviced and running perfectly! The bike I tested WAS the latest oil/air. I didn't think the new water cooled GS had been released yet?

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jaffa90

Joined:

Mar 09

Posts: 8609

jaffa90 says:

pep up

running perfectly,i suggest you leave well alone.

If you change things and run on a weaker mixture you could be asking for trouble because of the extra heat,more so with air/oil cooled engine.Also if the ecu is not automatic /adjustable:unsure:you will have problems at low revs.

As my first post i don`t know your model.

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littleredrooster

Joined:

Aug 02

Posts: 467

1200GS

I can confirm what jaffa said - the ECU will not compensate for filter/exhaust mods as it is a closed-loop system which runs a fixed fuel map (other than at idle and acceleration, when it goes open-loop and uses the lamda sensors).


As the 1200 runs notoriously weak in most situations, the only other alternatives for more power are either a Power Commander (or similar - Accelerator Module is another one) or a remap of the ECU which can be done by Hilltop Motorcycles in the Midlands and possibly others.

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eatcs01

Joined:

Aug 02

Posts: 3228

eatcs01 says:

1200GS

You can put a louder can on without any need to remap/power commander anything.
If you go for a K&N (but I wouldn't recomend you do) and a set of decat headers, then you can buy an "Accelerator module" that will sort the fuelling out enough. A power commander would be even better though.

Try looking on a GS specific forum.

How many miles has yours done?? They run much better after they've done some miles (30+k)

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