2 into 1 Exhaust ... Q

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

  1. DesertSurfer

    DesertSurfer Tail sprayin

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    Finally got my bike out of the shop this last weekend. Got the two into one installed along with a H2W jet kit and holy craps the thing is smooth. I still need more time to scrutinize the details but first impressions are no real detriments to the bike up to 90 mph. I haven't gotten somewhere to pull off 100mph plus yet to see if there is any restriction on the peak. But with the Remus Revo Alu it totally handles it great. CJ said he dyno'd his and it was within a few hps of stock on a 50k mile motor. Only thing that stood out was you can hear a slight post ignition against the bend of the two into one when the bike is warming up on deceleration. But once the bike is warm it disappears. I'm ready for my aux. tank now. Group buy anyone? Oh yea, I have a right hand side Remus Revo Alu for sale in the flee... anyone?
    #61
  2. Dagwood_55

    Dagwood_55 Long timer

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    If a guy were to be buying a new bike (0 miles) and installing 2-1 and can. Would/should you get it remapped and dynoed when new or break it in first??
    #62
  3. nevermind

    nevermind sLOW Rider

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    IMHO, no need to wait. Go forth and conquer!
    #63
  4. Kenbike

    Kenbike Been here awhile

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    I would get it broke in and have the first service preformed, why take a chance of damaging the motor with dyno pulls? Shops will have you sign a waiver in case your lets go durining the tuning session, that allways makes me nervous but I have never had an issue in over 15 dyno tuning sessions with all of my bikes.
    #64
  5. cpmodem

    cpmodem Orange Caveman

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    Not much useful info from a dyno run before the rings are seated anyways.
    #65
  6. nevermind

    nevermind sLOW Rider

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    Thanks for clarifying! :freaky I WOULD do the 2 into 1 but I wouldn't do any dyno runs. I would like to do a bike run-in on the dyno one day, but that is another complicated topic for another post and another day...

    FWIW, I really don't care about HP, I do care about A/F mixture after a change. However, I believe the 2 into 1 has been shown to be low impact to fueling, so I wouldn't worry about it.
    #66
  7. mrjemm

    mrjemm Clumsy Oaf

    Joined:
    Mar 22, 2004
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    Mogum Bay
    Hola folk,

    I got myself a 990 with a 2-1 and SS pipe that I cannot identify- looks unlike any I've seen about here yet.

    The pipe's got a hefty bore and no baffle came with it, and it's deafening me.

    Also though, and why I am posting, is that it pops a lot (and sucks fuel more than previous 950A (x2) 950SMR or 990SM), so I wonder if it's got the wrong map and running rich. Any ideas fellers?

    Certainly feels heartier than any of the previous bikes though, and pulls from lower also- when I went from std to Wings on 1st 950A, I saw an improvement; this is a whole different scale of improvement. But then I've not tried a 990A with std cans, just the SM.
    #67
  8. Hodgo

    Hodgo TWIN Cylinder ADV

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    Anyone here change to a 2 into 1 and keep one of the Akro's ?
    #68
  9. mrjemm

    mrjemm Clumsy Oaf

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    So noone could tell me if a 2-1 bike may be over fuelling if popping/guzzling? And perhaps if it's on the Akra map, and if a switch to standard would help?

    Pleeease.
    #69
  10. mousitsas

    mousitsas Long timer

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    The best way to know is to visit a shop with a brake dyno and gas analyzer.
    #70
  11. mrjemm

    mrjemm Clumsy Oaf

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    Thanks Mousitas, but probably pricy and not as easy to find as a KTM dealer who can just plug in and switch over if that's the issue...
    #71
  12. nevermind

    nevermind sLOW Rider

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    Popping and gurgling on decel is normally a lean condition. Lots of loud popping would have me looking for a dyno with a gas analyzer to check fueling across the rev range.
    #72
  13. mrjemm

    mrjemm Clumsy Oaf

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    Occasional loud pop on decel, kind of like a backfire, but not quite as harsh, but then exhaust is so loud it's hard to tell.

    Thanks guys.
    #73
  14. Qwik

    Qwik Adrenaline Addict

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    If you have 2-1 I would run a stock map. The popping and burbling could be a rich condition. Especially with the bad fuel mileage. Try a remap and see but you really should get an analyzed dyno run performed. That will give you a definitive answer.
    #74
  15. af300e

    af300e Been here awhile

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    Apr 12, 2007
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    Melbourne, Australia
    Just about to build a 2-1 system using one of a pair of akra evo titaniums.

    The pipes are used so there is a mark from the carbon clamp but naturally the clamp covers it reasonably well.
    If you can wait a month or so I'll knock up a second 2-1 pipe to suit it. I'll post pics once I have made mine.

    Be looking at $7-800 for 2-1 including the akra can and all required clamps (totally bolt on and complete).

    PM if interested.
    #75
  16. Kenbike

    Kenbike Been here awhile

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    Remus has a new 2 into 1 Roxx system with a slip on and y pipe designed from the ground out for the 990 Adventure. Has anyone installed or actually viewed the parts? The website does not give many details and I was looking for feedback.
    If you are running a Remus slip on do you like the performance, quality, and noise? I understand they do not require repacking? My 2 into 1 FMF will blow the packing in 2500 miles! This was the factory material and my second repack sounds as if it is getting pretty thin. I am really considering this system.
    #76
  17. Qwik

    Qwik Adrenaline Addict

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    I have a remus ti on my 950bike and am very happy with it. There are a LOT of ADV owners with em.
    #77
  18. Tijuana_Taxi

    Tijuana_Taxi Been here awhile

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    That system is brand new and I don't think it's out on the market yet. From the pictures I've seen it looks like it has a bigger pipe from the merge area back which is a good thing and Remus quality is top notch!!!! I'm interested in seeing one as well, I currently have a Remus Ti single muffler on my 990 with a 2 into 1 pipe and love it. No problems with the packing, some manufactures use Wool and some fiberglass, I think FMF uses fiberglass which won't stand up to the heat from the 2 into 1.
    #78
  19. Nailhead

    Nailhead Free at last!

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    The quality, fit, and light weight are great. The noise isn't. I really wish I could make it quieter somehow.
    #79
  20. Nuevototem

    Nuevototem Adventurer

    Joined:
    Oct 7, 2007
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    93
    Hi to all,

    I have a 2 into 1 exhaust adapter for sale, please send me a PM if interested

    Best Regards! :ear
    #80