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cat or not

Discussion in 'Exhaust System & Fuel Delivery' started by roger coleman, Aug 22, 2017.

  1. roger coleman

    roger coleman Well-Known Member

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    Can one of you clever guys, confirm that its not a requirment to have a cat fitted to your bike.
    I have an option of an Akropovic with or without cat, and want to be sure before I buy.
     
  2. Bravo

    Bravo Plenty in the tank. Contributor

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    Mine tend to sit on it but I shoo them orf.
     
  3. roger coleman

    roger coleman Well-Known Member

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    o dear, what have I done
     
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  4. Bravo

    Bravo Plenty in the tank. Contributor

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    I've just Googled it and no..... mind you it was from 2011 so don't take it as gospel.
    Having said that there's no emissions test for bikes as there is for cars so I reckon you'll be alright.
     
  5. roger coleman

    roger coleman Well-Known Member

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    yes, thats what Im thinking.
     
  6. Andy Griffiths

    Andy Griffiths Well-Known Member

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    Agreed - but, if the exhaust system is not E marked that could be an issue for over-sensitive MOT tester types and some insurance companies who ask if vehicle is legally compliant. Grey area.
     
  7. Aussie Import

    Aussie Import Well-Known Member

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    Keep all your std plumbing because at trade in time the dealers will crunch you on the exhaust mods.
     
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  8. roger coleman

    roger coleman Well-Known Member

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    this exhaust is for the 310R for my wife, there are two versions, the 'RACING' and the road legal catalytic version, the second is £100 more for the cat, plus £135 for the cat element?
    so you can see why im tempted to take a chance, besides, its the wife who will get the bollocking not me, so gains all round really.
     
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  9. Andy Griffiths

    Andy Griffiths Well-Known Member

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    RACING it is then :). MOT is three years away ...
     
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  10. mousejockey40

    mousejockey40 Active Member

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    You've unleashed Bravo on us. ;):p:D:D:D
     
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  11. Leon.P.

    Leon.P. Well-Known Member

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    I got my cat out by using a mouse.:) Sorry.:)
     
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  12. Yoda

    Yoda Active Member

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    Any chance she might want a French Crit Air sticker in the future? My 2015 RS with standard exhaust only gets a 2, my car got a 1 :cool:
     
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  13. roger coleman

    roger coleman Well-Known Member

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    Alan, are they annual or a one time buy?
     
  14. m1bjr

    m1bjr Member

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    Pulling the CAT might cause some ECU issues - not familiar with the bike, is it fairly new?
    If so the map will be all over the shop (probably lean) mixture maybe outside of what the fuel trims can cope with. Take care. How will you deal with the O2 sensor? is it in the down pipe?
     
  15. roger coleman

    roger coleman Well-Known Member

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    its the standard AKRO BMW offer for the bike, the o2 sensor fits in the new header pipe.
     
  16. Bunter

    Bunter Active Member

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    The legal requirement is for a replacement exhaust to meet the same emissions standards as the OEM system and be marked as such. If OEM had a CAT and you replace with a system without a CAT and without the corresponding markings it will not be legal. The chances of it being picked up at the roadside are slim IMO. The system without a CAT may well pass an MOT but that does not make it road legal.
     

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