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  • Whisper Posts: 9
    Stock Poster Whisper
    01 Dec 2019 08:29 PM
    Hello and thanks for your time. :)

    I have a 2010 FXSTC and I am trying to learn as much about my bike as I can, so far it has been a great experience.

    I decided to replace my S&S teardrop air-filter with a new Arlen Ness 90 degree filter setup - namely: Arlen Ness 81-000 Air Filter 90deg Big Twin'93up w/CV Carb or w/Dephi EFI (exc TBW'08up) Black.

    The issue I am having is, the new filter setup has gone one smoothly but I am left with the two breather hoses that were attached to the bracket bolts in the head.
    Can I simply remove the 'T' join (there are two hoses one to each bolt from a T joint) and make one single hose to vent into the Atmosphere?  

    Any suggestions are greatly appreciated as I do not know what to do from here :)
    Check out the attached photo.

    Cheers
    Whisper
    HD Forums Australia - breather-hoses-2010-FXSTC.jpg

  • Whisper Posts: 9
    Stock Poster Whisper
    02 Dec 2019 12:36 AM
    I just found this info:
    Our Monster Sucker 90° air cleaner kit features a massive forward facing filter design and our patented hidden breather backing plate for maximum performance gains
    Our patented hidden breather technology are o-ringed at the heads and exist out the mouth of the injector/carb to provide efficient engine breathing, eliminating the need for any external hoses or hardware
    Does this mean I can simply remove those hoses?
  • gidgi Posts: 818
    NSW
    Performance Poster gidgi
    02 Dec 2019 07:37 AM
    to put this into perspective for you , Harley engines breath from both heads  they normally flow into the backing plate of the filter & then the fumes / excess oil get  sucked into throttle body & back into the fuel/ air mixture, excess oil can contain within the filter  & eventually drip , this is something that  most people fix by re routing the breather via hoses from the heads to a T piece & into the atmosphere or a catch can. I have put a small chrome filter on the end of "said hose" this is called External breathing  with out seeing your set up it sounds like that`s wot is on there now ..Hope this helps 
  • mickle Posts: 2030
    Meadow Heights Victoria
    Motor Head mickle
    02 Dec 2019 07:53 AM
    Get rid of the hoses, that breather is breathing through the mounting bolts directly into the new breather, did you notice the bolts are hollow?
  • Whisper Posts: 9
    Stock Poster Whisper
    02 Dec 2019 12:24 PM
    Thanks heaps guys, just removed the hoses and it breathes through the backing plate, thanks again :)
  • tussuck Posts: 2101
    Melbourne
    Motor Head tussuck
    02 Dec 2019 12:30 PM
    I like the way the filter has a hole facing forward to catch the rain better and provide internal engine cooling....neat.
  • mickle Posts: 2030
    Meadow Heights Victoria
    Motor Head mickle
    02 Dec 2019 12:31 PM
    Quoting tussuck on 02 Dec 2019 12:30 PM
    I like the way the filter has a hole facing forward to catch the rain better and provide internal engine cooling....neat.
    Who rides in the rain?
  • tussuck Posts: 2101
    Melbourne
    Motor Head tussuck
    02 Dec 2019 12:41 PM
    Quoting tussuck on 02 Dec 2019 12:30 PM
    I like the way the filter has a hole facing forward to catch the rain better and provide internal engine cooling....neat.
    Quoting mickle on 02 Dec 2019 12:31 PM
    Who rides in the rain?
    Thats the problem!  Way too many snowflakes in this generation!  I ride rain or shine, but I have to as my bike is my commuter vechicle.

  • Whisper Posts: 9
    Stock Poster Whisper
    02 Dec 2019 12:44 PM
    Yeh, I don't ride in the rain, but Arlen Ness make great stuff and as it sits, is water resistant if you get trapped in the rain, no need for a sock :) - the forward facing hole is not directly open and cycles air back into the filter. I would recommend another filter if you are riding in the rain a lot - or a car.
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