1. 4 Stroke Husqvarna Motorcycles Made In Austria - About 2014 & Newer
    FE = 4st Enduro & FC = 4st Cross

FE/FC 501s deSmog

Discussion in '4st' started by Khaaf162, Aug 12, 2015.

  1. Khaaf162 Husqvarna
    AA Class

    Husqvarna Motorcycle:
    2015 fe501s
    I got a new 2015 501s a few months back and thought all the smog stuff was off. They gave me a box with a few hoses and a canister in it. After looking at my friends husaberg 501 i noticed a part that i think is part of the smog stuff in the pic below. Where it mounts to on mine his just has a bolt which i belive is in the bag of goodies they gave me with the bike. My question is is it worth the time to take off and will it make any difference at all with the bike in any way? image.jpg image.jpg image.jpg

    Attached Files:

  2. Tinken Husqvarna
    Pro Class

    Location:
    Hesperia, CA
    Husqvarna Motorcycle:
    MY12 WR511
    Other Motorcycles:
    Yamaha
    SAS/SLS secondary air system. On the EFI bikes, the SAS is only used for a brief period on startup, to bring the O2 sensors up to temperature. After that, the EFI switches to closed-loop control to ensure the CAT's have the required O2 to work properly. If you disconnect the harness you will not be able to start the bike unless you fit an electronic plug to fool the ecu that the sas is still there.

    You will not get any gain from the SAS kit, but it may help the dyno boys as they need to block it off to map the bike (if you have a power commander). It sometimes can stop popping on overrun, some people have posted that they noticed an improvement but I can't quite see how, maybe with the stock ecu the lamda sensors may get a better reading with no fresh air in the system but with narrow band sensors I doubt it.

    Vendors want you to take it off because they want to sell desmog kits. I'd leave it on there until you are prepared to dyno tune.
    Khaaf162 likes this.
  3. Khaaf162 Husqvarna
    AA Class

    Husqvarna Motorcycle:
    2015 fe501s
    Just to make sure we are talking about the samething here. It is the silver piece with just a hose coming out and no wire coming out of it.
    Tinken likes this.
  4. Tinken Husqvarna
    Pro Class

    Location:
    Hesperia, CA
    Husqvarna Motorcycle:
    MY12 WR511
    Other Motorcycles:
    Yamaha
  5. Khaaf162 Husqvarna
    AA Class

    Husqvarna Motorcycle:
    2015 fe501s
    Thank you very much for the info
    Tinken likes this.
  6. Tinken Husqvarna
    Pro Class

    Location:
    Hesperia, CA
    Husqvarna Motorcycle:
    MY12 WR511
    Other Motorcycles:
    Yamaha
    Remove your coolant thermostat and add XF2 coolant. We have the hoses which remove it without adding anything.
  7. Khaaf162 Husqvarna
    AA Class

    Husqvarna Motorcycle:
    2015 fe501s
    That is something that I will be doing soon