New bike under breakin and seeing carbon build up on the exhaust.

Discussion in 'General VFR Discussions' started by Bubba Utah, Jun 23, 2016.

  1. Bubba Utah

    Bubba Utah Member

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    Ok guys and girls, I again am a newbie. I just bought my NEW (Less than 1 mile) 2014 VFR800F. I Have asked question about risers and pegs. But, the real question that I have for the experienced group is that at 460 miles and coming into my breakin service that the dealer said to (and I agree) to alternate the RPM's from idle up to redline during the breakin. I did so ,but I am seeing nothing but carbon (Black buildup on the exhaust). I know that a new motor whether a bike or a car, you should see some water vapor or such off of the exhaust. Am I delusional or is this a overly rich mix on the injectors or damage? I would rather ask this community rather than the dealer at the time of service. Please give me your input. I mean the bike sat in the dealer for 2 years and I know the rings, rubber bushings ext. dry out without being used. Let me know. Thanks Mike D.
     


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  2. Allyance

    Allyance Member

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    How is your oil level? Rings need time wear in, could be a little oil burning at first. Wipe the inside of the pipe and see if more carbon builds up. I run Amsoil 10W-40 pure synthetic and have no loss or problems. My 83 sat for 15 years, replaced all the rubber parts, shot some oil into cylinders, cranked the engine over for a couple of minutes (no gas), then changed the oil. After carbs were cleaned, she ran fine.

    Just checked my exhaust pipe after 13K miles, and just a very light coating of carbon.
     


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  3. Mark919

    Mark919 New Member

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    It's not at all unusual to have black combustion byproducts inside the exhaust pipe. Water vapor and hydrocarbons are normal.
    As suggested, watch for oil consumption. After break-in of 1000 miles or so that should be negligible.
    If you are concerned about the engine running too rich then (after break-in) I'd suggest just pulling a spark plug and check for color. That would be a better indicator than the exhaust. And if you are at the dealer there is no reason not to ask the question. They can always do an exhaust analysis to check things out.

    Great Weimaraner photo BTW!
     


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  4. James Bond

    James Bond Member

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    Give it some high rpm's and it will be a happy bike. Gas and oil are hydrocarbons and both burn. Of course the end of your muffler will be black. That is the coolest area of your entire exhaust system too.
     


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  5. Bubba Utah

    Bubba Utah Member

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    This is unrelated, but I see that you have over 14,000 on the bike. What replacement tire do your recommend other than the OEM? I found that Michelins did better on the Sv1000s than Dunlops. I know that different tires cup less on different bikes and weight.
     


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  6. Diving Pete

    Diving Pete Member

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    there are 2 schools of thought on engine break-in procedure - 1st is follow the manufacturers instructions.
    2nd is ride it normally until warm then THRASH IT..... !
    Apparently this seats the rings much better with less blow back.
    On the tire front I'm getting in the next week a set of Bridgestone T30 Evos. Currently have a set of BT-23's & they are predicable to the edge of the tire but want a change.
     


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  7. GreyVF750F

    GreyVF750F Member

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    Go thru this whole page for break in procedures. Yes they are different but they work better than anything else. The pressure behind the rings is the secrete. We use to break in motors with the attitude of "break it in hard and it will run hard". It has always worked but we didn't really know why. I do now and it really makes sense.

    Half way down is photos of F3 pistons. Seeing is believing.

    http://www.mototuneusa.com/break_in_secrets.htm
     


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  8. James Bond

    James Bond Member

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    The best way to break in a new bike is to bring it to my house with $400 for gas money. When I run out of money for gas, I call you, you come get your bike, and it's broken in. Can it get easier than that. Seriously, just ride the bike.
     


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