Benefits of Akrapovic downpipes and zaust on 1250

[Morety]

Depends where you are in the UK. I've used Lee Motorcycles in Ledbury, Herefordshire in the past. The guy there knows his stuff, is reasonable and has a good dyno set up.

 

[ReGenesis]

RJS at Mallory Park are one of the best there is.
Their dyno is also the one used by most of the race teams who aren't on either coast as its proven to be repeatable.
GS's are not their usual bag however you'd be surprised.
Optimum AFR is 14:1 so most ECU's will try for that however they will be a long way off it when its tracked on a dyno.
Using a PC to piggyback is one of the most effective ways to drop a custom map on there that is easily changed, removed, etc.
Used on thousands of bikes including race bikes all over the world - everything can be trimmed right down to each cylinder/rpm and ignition if needed.
Not going to get into any argument about anywhere else and their method - if you are looking to sort fuelling/tune then my money would go on a PC V not something generic that is used to fool sensors or dropped into the ECU

 

[Deleted account 191119001]

RJS at Mallory Park are one of the best there is.
Their dyno is also the one used by most of the race teams who aren't on either coast as its proven to be repeatable.
GS's are not their usual bag however you'd be surprised.
Optimum AFR is 14:1 so most ECU's will try for that however they will be a long way off it when its tracked on a dyno.
Using a PC to piggyback is one of the most effective ways to drop a custom map on there that is easily changed, removed, etc.
Used on thousands of bikes including race bikes all over the world - everything can be trimmed right down to each cylinder/rpm and ignition if needed.
Not going to get into any argument about anywhere else and their method - if you are looking to sort fuelling/tune then my money would go on a PC V not something generic that is used to fool sensors or dropped into the ECU

Without getting into arguments as you say, the problem here is the 1250 with the pesky 3rd O2 sensor, it is a tad more complicated than that, that is why it is raging on in the post below, and all the thread is worth time to read not just the believers of smoke and snakeoil.

https://www.ukgser.com/forums/showthread.php/514389-1250-Tuning-options-available

 

[crazyke]

Maybe worth mentioning.

My 1250 GS with Akrapovic exhaust (no akra downpipe) runs very klunky and irregular, sometimes stalls, from cold start for about 1 minute. After that it runs great. Dealer told me some sensors have to be rekalibrated.
I don't know if this is because of the akra exhaust with the engine set up for a normal pipe.

 

[CPJS]

Maybe worth mentioning.


My 1250 GS with Akrapovic exhaust (no akra downpipe) runs very klunky and irregular, sometimes stalls, from cold start for about 1 minute. After that it runs great. Dealer told me some sensors have to be rekalibrated.
I don't know if this is because of the akra exhaust with the engine set up for a normal pipe.

Probably just your bike rather than the exhaust.
Get the dealer to do their recalibrate.

 

[grant123]

Maybe worth mentioning.

My 1250 GS with Akrapovic exhaust (no akra downpipe) runs very klunky and irregular, sometimes stalls, from cold start for about 1 minute. After that it runs great. Dealer told me some sensors have to be rekalibrated.
I don't know if this is because of the akra exhaust with the engine set up for a normal pipe.

if you can get someone with GS911 they should be able to reset the adaption.

i run a straight throw can on mine, stock cat and it runs great - but i fitted the can with only 200-300 miles on it.

 

[crazyke]

if you can get someone with GS911 they should be able to reset the adaption.

i run a straight throw can on mine, stock cat and it runs great - but i fitted the can with only 200-300 miles on it.

My gs was delivered new with the akra. Don't know how it would run with a normal exhaust.
I'm taking it to the dealer in a few weeks. We'll see what will be the solution.