SAS System Removal??

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GaryCulb
500cc
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SAS System Removal??

Post by GaryCulb » Sat Aug 18, 2018 8:50 pm

On the 2017 KTM SDGT:

If your remove the SAS System be prepared for some throttle surging especially in the lower gears & some increased heat from your catalytic converter. I did not know this but the KTM SDGT’s SAS system & the bikes catalytic converter work in conjunction/ closely with each other. Others on this forum have noticed this association.

There is a high probability for increased stability, smoother ride and a 45 % heat reduction if you eventually decide to de-cat your KTM SDGT (took me 7K miles to figure this out) especially, if you have already removed the bikes SAS System. Mid pipes vary. Here are some I tried. Remus ( https://www.revzilla.com/motorcycle/rem ... -2016-2017 )- straight through pipe/ Arrow- still working on SDGT Model/ Bodis- allows for some back pressure & re-fitting the bikes heat shield (https://mygpracing.com/product/cat-repl ... e-gt-2016/ ). Went with the Bodis mid-pipe: only 2 dB increase in sound & no backfiring. When you remove the catalytic converter do not forget the HealTech ESE ( https://www.healtech-electronics.com/products/ese/ ) to prevent error messages from removing the bikes exhaust Servo & a retaining bracket for your rear brake cylinder reservoir ( https://www.satoracing.com/universalbrackets.htm ). There are no maps that can just be loaded into your SDGT ECU by your KTM Dealer like with the SDR so, you will need to install the Power Commander V or similar ECU unit (PCV- http://www.rottweilerperformance.com/powercommander-v/ ). If you purchase a PCV from Rottweiler Performance Gary the owner will install the appropriate maps. Consider the Dynojet PCV Map switch so, you can switch between maps while riding (https://www.revzilla.com/motorcycle/dyn ... map-switch ).

For the Dynojet Auto Tune that goes with the PCV you will have to remove the bikes headers, plug up or remove the 12 mm O2 sensor bung holes & have new 18 mm O2 sensor bung holes welded into the bikes headers. 18 mm O2 sensor weld angle & position has to be very specific. A jig is often required. Arrow does not make headers for the SDGT. Rottweiler said they can do it for around $80. KTM Dealer wanted around $200. So, no Dynojet Auto Tune for me right now. Appalachian Mountains are only 5K altitude max anyway.

Removing the KTM SDGT SAS system, catalytic converter & adding the PCV have some dramatic effects on the bike. There is a 45% reduction in heat. You still get heat from the engine but nothing like stock. The KTM is much smoother & more stable especially in the lower gears. No chuga-chugging or surging. I have not Dyno’ed the bike but the HP seems improved.


Conslusion: Leave your KTM SDGT Stock or be prepared to purchase at least the following: SAS removal kit(s)/ Mid-Pipe/ PCV/ HealTech ESE / etc. (arround $1,125). For me it became a all or none move.

Best,

Doc :? :?

WERAracer
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Re: SAS System Removal??

Post by WERAracer » Wed Aug 22, 2018 6:39 pm

Great info. Any thoughts on just a can that’s virtually open with all the stock bits in place?

GaryCulb
500cc
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Joined: Thu Aug 17, 2017 11:19 am
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Re: SAS System Removal??

Post by GaryCulb » Thu Aug 23, 2018 11:23 am

WERAracer,

Do not believe that De-Cating alone would result in a smooth & stable ride. Changes like that most likely are going to require a ECU controling device like a PCV. If you are installing a PCV just makes sense to get ride of the SAS system at the same time? Best,

Doc :) :)

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