1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

De-cat & O2 sensor eliminator plugs: opinions please.!

Discussion in 'Norton Motorcycles (Modern)' started by Deano, Sep 16, 2019.

  1. BLIGHTYBRIT/SF

    BLIGHTYBRIT/SF VIP MEMBER

    Joined:
    Feb 28, 2016
    Yep,it’s a copy that from me, 2016 MK2 euro 3 , the o2 delete plugs must me the most inexpensive mod u can do to make a difference, I have short stubbie silencers/ decat pipe ,it’s done away with the odd cough and splutter I used to get,and also an odd judder ( as if fuel had stopped for a tenth of a second)does not rev up or cut out at all .
     
    richard-7 and Deano like this.
  2. Deano

    Deano

    Joined:
    Jul 24, 2019
     
  3. Deano

    Deano

    Joined:
    Jul 24, 2019

    That's great thanks & it gives me some hope.! I'll post up an honest assessment once I've fitted the parts & put enough town mileage on it to know if it's worked.
     
  4. richard-7

    richard-7

    Joined:
    Feb 24, 2014
     
  5. 2cups

    2cups

    Joined:
    Feb 8, 2018
    Cheers that makes good sense. Probably just slightly bad fuelling from Norton’s map. The power Commander improved the fuelling a lot but probably needs more time on the dyno. There is no pre programmed map from DynoJet for the Norton so it’s a modified map on the dyno. It’s only a small niggle and disappears with a increase of the throttle. Huge thanks to all you knowledgeable guys working for us all
     
  6. Deano

    Deano

    Joined:
    Jul 24, 2019
    Well that's the first part of the job completed, the decat pipe has now been fitted. But what a pig of a job it was! What should have taken no more than an hour took a good half a day... :rolleyes:

    The decat pipe was a full inch longer than the cat pipe & although it sleeved further over the down pipes, it wouldn't go on far enough to lose the difference in length. As a result I had to remove both downpipes & cut 1/4" off them to prevent them being strained. The downpipes & decat pipe were then re-fitted but not tightened so as to allow some movement. When I then went to re-fit the silencers however, the L/H side fitted perfectly but the R/H side was clearly too close to the swinging arm. This required tweaking the angle slightly further outwards on the decat pipe R/H side, not an easy task on a short length of stainless steel that diameter.!

    All completed now though & the bike sounds fine & looks a lot better without the discoloured cats spoiling the aesthetic. Has anyone else encountered similar fitting issues with the decat pipe (new style)?
     
  7. TonyA

    TonyA

    Joined:
    Jan 16, 2015
    I have never fitted a New Norton De Cat X- pipe . It doesn't make sense that they would change the length by an inch or more ? You had to cut off an inch of your head pipes ? Maybe the sleeves were too tight to allow full insertion ? I would have called Norton on that one !
     
    richard-7 likes this.
  8. Deano

    Deano

    Joined:
    Jul 24, 2019
    The decat pipe was exactly 1" longer as measured. Most of the difference (approx 3/4") was lost by them fitting further over the downpipes but I still had to trim 1/4" off them as they had reached the internal smaller diameter on the decat pipe. This was felt with a solid clonk & also measured just to be certain.
     
  9. TonyA

    TonyA

    Joined:
    Jan 16, 2015
    So only a 1/4 inch. You should tell Norton about it because this could be resolved by making the larger outer diameter longer so it will fit all of our bikes. Let them know I say.. Just a bit longer expansion on the mandrel . They may have fixed it on the spot for you Could it be that this X-pipe was incorrectly made ? I would hate to cut my pipes !
     
    Last edited: Sep 19, 2019
  10. Deano

    Deano

    Joined:
    Jul 24, 2019
    It may be that the new style decat pipe is made for a Euro 4 spec bike? The catalytic converter section is visibly different on those to the one fitted to my own 2014 Euro 3 spec bike but I don’t know if they, or the downpipes, are different lengths?

    Just a thought... o_O
     
  11. ntst8

    ntst8 VIP MEMBER

    Joined:
    Feb 14, 2004
    That would be a good run from here, thanks for the invite. I had 3 days away on the ES2 last weekend so on a short leash this week : )
     
  12. iwilson

    iwilson VIP MEMBER

    Joined:
    Nov 6, 2015
    No problem, went out yesterday for a 100km shakedown ride. Within 10km one bar end mirror made a dash for freedom but was foiled by me sacrificing my front brake to hang on to it! Fixed on the roadside so all good. Confidence continued to build and ended up having a good blast through my favorite twisties. It was only when I got home I discovered things could have ended badly!

    [​IMG]

    Rear tyre must have got compressed sufficiently to catch the plate holder and do quite a bit of damage. Tyre seems ok and I didn’t notice anything at the time. Needed a hammer to straighten it out. Adjusted the angle to prevent a recurrence.

    [​IMG]

    Run was about 250km today and it ran perfectly all day. Well almost... At our first stop the guy behind me in a Dodge Viper reported running over my number plate - oops!
     
    MxMartin and pingu-nz like this.
  13. ntst8

    ntst8 VIP MEMBER

    Joined:
    Feb 14, 2004
    Crikey, that could have been painful.
     
  14. TonyA

    TonyA

    Joined:
    Jan 16, 2015
    Hello Iwilson , Can you extend the tail tidy further back so it will clear the rear wheel travel ?
     
  15. Britfan60

    Britfan60

    Joined:
    Jan 5, 2014
    First of all, I made the same mistake by not putting a plate sized backing plate behind the license plate. My license plate ripped along the tidy from wind and vibration. You can get presized and drilled plates from fleabay at a very reasonable cost. Luckily I caught it before it completely ripped. So I assume you nicked that extended tab under the plate?
     
  16. iwilson

    iwilson VIP MEMBER

    Joined:
    Nov 6, 2015
    Yes the tab would have been the lowest point it has\had a reflector on it to get through the annual Warrant of Fitness. The second picture is the angle currently, it wasn't a lot lower but clearly just low enough to catch the tire. I'd imagine the ability of the tire to deform and the rotational energy meant I didn't notice at the time.

    I could but this was just quick and easy and I don't have the fabrication skills or equipment to do a better job!
     
  17. Britfan60

    Britfan60

    Joined:
    Jan 5, 2014

Share This Page