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Thread: Exhaust Mod?

  1. #91
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    Quote Originally Posted by Skutorr View Post
    The same weight Dr. Pulley Sliders will be even faster off the line and give you back your lost top end...
    Alright Thanks

  2. #92
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    Quote Originally Posted by bill steele View Post
    Aside form making the exhaust note different, what benefit are you getting, You won't even notice 2 horse power up grade, and the mpg will be very small if any, seems a very expensive add on for not much benefit.
    I too wanted to change the exhaust. Probably because I came from the Harley family and change just to be changing seems to be the Harley mentality. The $750 Aprakravic seems to meet that criteria. Stock I'm getting 65 mpg by using non-ethyonal (sp?)fuel. Also can't figure out what Fuel Moto's Power Commander 5 will do for the 650's. Personally, glad to finally have a "perfect" set of 2 wheels. JMO

  3. #93
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    I have a 2013 C650GT. I ended up getting a 2016 C650 Sport muffler for a great deal. My question is, can I put this 2016 sport muffler on my 2013 C650GT. Do I need to remove the catylitic converter? It does look like I will need a reducer and perhaps make some mod in the length somewhere.
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  4. #94
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    It will be a bit of a pfaff.

    The new muffler has a smaller cat underneath where the big square one use to be. Is more like a bulge in the pipe now. The old cat was also a muffler, so if you keep it and add the new muffler it might be extremely quiet, if it even fits. So, if its legal for you, you'll need to get a new header that deletes the cat, otherwise get a 2016 header with the smaller cat.

    Then, the GT muffler sits at a lower angle than the sport one because of the fat arse bodywork. So you might need to modify the connecting pipe, as the muffler is a different part between Sport and GT.

    Be a lot easier to just get an Akra...

    Sent from my SM-T810 using Tapatalk

  5. #95
    Senior Member Skutorr's Avatar
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    Have you considered an MIVV Speed edge exhaust for your GT? They look and sound GREAT!

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    Link to MIVV:
    https://www.mivv.com/en/products/b-0...c-650-gt-2012/

  6. #96
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    Quote Originally Posted by justscootin View Post
    I would think the warranty would be shot on the engine and the exhaust. The engine needs an exhaust with a specific back pressure which I am sure does not exist anymore more. The valve clearances and timing may also be different

    The one thing that you can change is the type of oil you would use as the oil bmw specifies prevents damage to the cataletic converter.

    Just my opinion and thoughts. If you do any modifications to the scooter bmw will use any excuse not to warranty the scooter and you are on your own. I say do not do any mods till your warranty is up, or at least close to the end
    There is legislation that actually protects you from this.

    Of course, you lose the emissions warranty, but not anything else.

  7. #97
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    Quote Originally Posted by exavid View Post
    I'm surprised a shop wouldn't refuse to work on a bike that's had the cat removed. A lot of states now require the original exhaust system to be maintained to insure correct emission controls.
    All 50, so ya, "some".


  8. #98
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    Hi,

    I have C600 Sport (2013) with J.Costa EVO4 variator (18g) and sport air filter.
    Now I've changed collector form C650 Sport.
    It wasn't easy and custom modification was needed on akrapovic muffler pipe.
    I was not on dyno test but for sure the sound is stunning!

  9. #99
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