Advice following decat installation

[max_mgt88]

Hello

Excuse me for the google translate.

I introduce myself max from France.

I have a brand new 701 svartpilen from 2022 (but eu4 from 2020) which I equip step by step.

I installed a decat with the stock muffler (because the noise with the catalyst was just sickening).

I have browsed the 11 pages of the forum, but what do you advise me now to improve the motorcycle to the decat? I am a little lost...

I am not looking for a racing machine but good engine behavior.

what do you recommend ?

A rottweiler fuel EU4 dongle?

Rottweiler fuel dongle

Rottweiler fuel dongle for the husqvarna 701 2016-2020 and ktm 690 smc-smc-r 2008-2020

www.avdvparts.com

An EU5 o2 optimizer (which works with eu4 and o2 sensor)?

O2 optimizer ktm 690 smc-r / husqvarna 701 specially designed for the EU-5 engine 2021+

Inline O2 optimizer for the husqvarna 701 ktm 690 smc-r gasgas 700 sm/enduro 2021-2026 also available for the new 2026 version! Specially made for the 2021-2024 euro 5 and euro-5+ engine (EU) engines as the close loop can be retained so you don't remove the O2 sensor(s) The in line O2...

www.avdvparts.com

An o2 sensor controller?

Husqvana Svartpilen Vitpilen 701 kev mod Version VB | eBay

Find many great new & used options and get the best deals for Husqvana Svartpilen Vitpilen 701 kev mod Version VB at the best online prices at eBay!

www.ebay.com.au

Is it advisable to remove the air addition system?

BW 701 Vitpilen/Svartpilen SAS Removal CNC plate

The SAS removal plate is needed to replace the standard SAS cover when you buy the SAS Valve Eliminator kit for Husqvarna 701. Made in Aluminum, CNC Machined, and engraved with BW logo. Video tutorial

www.badwinners.com

SAS Valve Eliminator kit for Husqvarna 701

The secondary air injection system (SAS) routes fresh air from the airbox to the exhaust system in order to aid the combustion of unburned fuel in the exhaust. This system is designed to improve emissions on stock exhaust systems but will cause exhaust popping and backfiring when you fit...

www.badwinners.com

Finally is it advisable to remove the cover of the air box and even I could read to raise it with wedges?

Thank you for your feedback, I will quickly post photos of the bike once finished.

 

[ChainsawDuke]

EU4 dongle is good.
Not heard of anyone using an EU5 dongle on Vit/Svart.
O2 sensor controller seems to be a step up from a dongle, those who have them like them.
Dynojet PCV or a ECU reflash would be best option.

As for the airbox lid removal, do it. Seems to work with all the above with no downsides.

 

[Nopper]

I would advise you a unit from COOBER.

 

[Nopper]

701 SERIES Archives - COOBER

www.coober.eu

 

[bartiger]

Hey, dm @FaNaTic he might have all the answers you need, and for shure has some local tuner..

 

[Actionabe]

The Rottweiler dongle helps smooth the bike out at low rpm even if you don’t do any mods so I would recommend.

You really only need the tune from what I have seen when you remove air flow restrictions on the intake and exhaust side, so if you removed the cat but left the lid on the intake is still restricted so the engine doesn’t “pump air” better or with more volume. In my opinion if your removed the cat and took the lid off you’re now increasing the flow of the engine and may need a tune.. it’s all dependent on how restrictive the stock muffler is.

 

[SamV]

Hello

Excuse me for the google translate.

I introduce myself max from France.

I have a brand new 701 svartpilen from 2022 (but eu4 from 2020) which I equip step by step.

I installed a decat with the stock muffler (because the noise with the catalyst was just sickening).

I have browsed the 11 pages of the forum, but what do you advise me now to improve the motorcycle to the decat? I am a little lost...

I am not looking for a racing machine but good engine behavior.

what do you recommend ?

A rottweiler fuel EU4 dongle?

Rottweiler fuel dongle

Rottweiler fuel dongle for the husqvarna 701 2016-2020 and ktm 690 smc-smc-r 2008-2020

www.avdvparts.com

An EU5 o2 optimizer (which works with eu4 and o2 sensor)?

O2 optimizer ktm 690 smc-r / husqvarna 701 specially designed for the EU-5 engine 2021+

Inline O2 optimizer for the husqvarna 701 ktm 690 smc-r gasgas 700 sm/enduro 2021-2026 also available for the new 2026 version! Specially made for the 2021-2024 euro 5 and euro-5+ engine (EU) engines as the close loop can be retained so you don't remove the O2 sensor(s) The in line O2...

www.avdvparts.com

An o2 sensor controller?

Husqvana Svartpilen Vitpilen 701 kev mod Version VB | eBay

Find many great new & used options and get the best deals for Husqvana Svartpilen Vitpilen 701 kev mod Version VB at the best online prices at eBay!

www.ebay.com.au

Is it advisable to remove the air addition system?

BW 701 Vitpilen/Svartpilen SAS Removal CNC plate

The SAS removal plate is needed to replace the standard SAS cover when you buy the SAS Valve Eliminator kit for Husqvarna 701. Made in Aluminum, CNC Machined, and engraved with BW logo. Video tutorial

www.badwinners.com

SAS Valve Eliminator kit for Husqvarna 701

The secondary air injection system (SAS) routes fresh air from the airbox to the exhaust system in order to aid the combustion of unburned fuel in the exhaust. This system is designed to improve emissions on stock exhaust systems but will cause exhaust popping and backfiring when you fit...

www.badwinners.com

Finally is it advisable to remove the cover of the air box and even I could read to raise it with wedges?

Thank you for your feedback, I will quickly post photos of the bike once finished.

How s the sound with decat and ori muffler? Not too loud but still good?

 

[max_mgt88]

Comment est le son avec le silencieux decat et ori ? Pas trop fort mais toujours bon ?

Hey SamV

Excuse me for my late reply

Yes the sound is very good for a low cost.

The sound is like a good old "mono" 600 xt, very nice!

For my initial question I finally mounted the 02 optimizer and the bike turns perfectly!

O2 optimizer ktm 690 smc-r / husqvarna 701 specially designed for the EU-5 engine 2021-2022

Inline O2 optimizer for the husqvarna 701 ktm 690 smc-r gasgas 700 sm/enduro 2021+ Specially made for the 2021-2023 euro 5 engine (EU) but also works for the 2008-2020 engines as the close loop can be retained so you don't remove the O2 sensor. The in line O2 optimizer works with the...

www.avdvparts.com