2 into 1 Exhaust ... Q

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by Platypus-3in1, Mar 14, 2011.

  1. Nailhead

    Nailhead Free at last!

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    Same setup, same old map & it seems to work just fine.
  2. moto-treks

    moto-treks Back Home

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    I'm not suing the Akro map just the standard map and I have the same setup on a 2010 990. I'd think the Akro map, which puts too much fuel into the system for dual exhaust would put way too much fuel in with the single exhaust.
  3. chrish4ku

    chrish4ku Been here awhile

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    Map Changed:

    I changed back to the stock map - no O2 and the bike runs fine. A little popping on decel, but so far so good otherwise. Gotta love it when you can flash your own maps in less than 5 minutes. Oh, and the bike isn't twice less noisy....ha. Still has a pretty loud growl coming through that one Remus can. Good for lane splitting in the morning while in the webster tube (Alameda - Oakland). Very Narrow!!
  4. duroturk

    duroturk Been here awhile

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    So if I understand correct, going into 2in1 from the stock doesn't need any mapping right? If so, I'll be happy as I am far from dealers.

    And one more question: Is there something specific when selecting cans? I mean, I have an Akrapovic Ti can for a F800GS and wondering if it is ok if I fit it on my '06 990 Adv as a single can?

    Thanks in advance for the replies.
  5. duroturk

    duroturk Been here awhile

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    No response? :(:
  6. moto-treks

    moto-treks Back Home

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    I didn't remap my 2010 990. The shop I bought the setup from told me it wasn't necessary. I've not had any problems with the FI after going to the single exhaust.
  7. ian408

    ian408 Oh? Administrator

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    It would be better to ask an Akrapovic dealer that question.
  8. tahoeacr

    tahoeacr Long timer

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    With the standard 2-1 your forcing two cylinders to breath through one exhaust can. If the inside diameter is roughly the same as one of the originals/aftermarket cans in general your bike will be a little richer. Nothing specific except mounting. If the Akra can off your F800 can be mounted up run it. I suspect you will need some type of custom mount and bracket made up.
  9. duroturk

    duroturk Been here awhile

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    Thank you guys!

    Yes, mounting is not a problem, I can do that. I was searching and thingking about this for a while and the mapping was my only concern.

    Thank you all once again.
  10. Nailhead

    Nailhead Free at last!

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    I don't believe that is so: the oxy sensor & ECU will maintain a stoichiometric condition (on a 990 obviously) with a smaller pipe. Engine power would decrease with this, though.
  11. moto-treks

    moto-treks Back Home

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    My understanding is that you gain a little in the low end and lose a little in the top end. But, with the power avaiable with the 990 does it really matter? I'd give up a hp or two for the decrease in weight.
  12. mousitsas

    mousitsas Long timer

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    FI is in close loop operation at a relatively small part of its envelop (small steady throttle). At all other times it is based on intake sensor readings.
  13. chrish4ku

    chrish4ku Been here awhile

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    Most folks don't remap when going 2:1 - I did cause I have the software and cable to muck with it.


    I wouldn't think you can use another model slip on with the KTM as I think the pipe end/diameter is specific for that bike. You might be able to use like a superduke can? Not sure about that one.
  14. chrish4ku

    chrish4ku Been here awhile

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    I worked with a fellow ADV inmate who is a phenomenal welder. He has solved the issue of the weak ADV bracket that gives and bends allowing your wheel and swingarm to hit the ADV tank. The nice thing here is it is a bolt on or off application - so you can remove it if ever needed. 750 miles so far - 600 in the dirty all over Death Valley, Sedona, and Flagstaff. My rear wheel has bout 1/2 inch of space when fully compressed so it does not rub the tank.

    R&D
    [​IMG]

    Ensure the fitting is accurate
    [​IMG]

    before installation
    [​IMG]

    Add the tank
    [​IMG]

    Finished product
    [​IMG]

    [​IMG]

    utilizes the two original bolt holes on the tank
    [​IMG]

    Avoids this..
    [​IMG]

    and this:
    [​IMG]


    If anyone is interested I can put you in touch with the developer. He is in NorCal.

    Cheers,
  15. moto-treks

    moto-treks Back Home

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    Nice mod :thumb Is that the KTM OEM pannier mount? I just ordered a Touratech stainless steel mount and the front brace that runs to the foot peg is interfering with the tank.
  16. chrish4ku

    chrish4ku Been here awhile

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    I think that I own the KTM version of these racks but someone may be able to validate. This is what I have:

    http://www.ktmtwins.com/ktm-950-990...ktm-950-990-adventure-suitcase-carrier-system

    When my Gobi side cases are on this setup they do touch the tank so I have attached a piece of thin no-rub to the area. It's very minor but I did it just to be safe.

    I don't have any experience with any other racks as this was made custom for me, which I assume will work for anyone whom has the KTM racks. I know 4 other guys who have the same tank installed and they are looking to get this bracket. It essentially eliminates ANY movement of the tank. Of course the original ADV tank design was meant to work without the racks but 98% of riders I know have racks. Take photos and show us, maybe we can help.
  17. moto-treks

    moto-treks Back Home

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    The problem is in the way the front support of the rack attaches from the foot peg to the bag support/mounting oval. On the Touratech mount that support piece is straight. The KTM mount has a bend in it. Touratech USA is willing to ship me a KTM mount to use as a pattern if I want to modify their mount. So, I need to decide if I want to ADVTank enough to make the modification or just remove it and put it up for sale.
  18. chrish4ku

    chrish4ku Been here awhile

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    Ya I hear you man - nothing can just be perfect out of the box ya know..! :D
  19. ian408

    ian408 Oh? Administrator

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    The correct response would have been "Works for me." :lol3

    It's a tough call because there are several different ways you could do it depending on what luggage system you have (including none). When I look at the "stock" bracket, I think taking a lot of it off would be beneficial too.
  20. Korruptio

    Korruptio Adventurer

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    I did a 2-1 change to my bike during long winter. Here are the raw results, Leo Vince midpipes and silencers were taken off and polish made 2-1 pipe + single Wings silencer was installed. I didn't change fuel mappings, both dyno runs had exactly the same software inside the ECU. Only other hardware change was new OEM air filter because I managed to create an extra hole to old filter when it was off the bike... Old filter wasn't in bad shape, I could have used it for this summer most likely. Also engine oil and coolant were changed but I doubt they have much effect. :)

    Dynograph for Leo Vinces:

    [​IMG]



    Dynograph for 2-1 pipe with Wings silencer:

    [​IMG]