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XJ650R carb and running issue

Discussion in 'XJ Technical Chat' started by Austin Ramey, Nov 15, 2018.

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  1. XJ550H

    XJ550H Well-Known Member Premium Member

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    does it have a vent?
     
    XJ550H, Apr 26, 2019
    #51
  2. Austin Ramey

    Austin Ramey Member

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    Austin Ramey, Apr 26, 2019
    #52
  3. Austin Ramey

    Austin Ramey Member

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    Yes
     
    Austin Ramey, Apr 26, 2019
    #53
  4. Austin Ramey

    Austin Ramey Member

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    I did the cold run like you asked and same issue. I did pay mower attention to the hesitation is around starts about 2000 RPMs to 3000. But if you get on it it’s not there. I took volt readings at 2000RPMs and it was 14.15 VDC and 3000RPMs was 14.26 VDC.

    I have a thought and taped half of my air filter with duct tape and went for a ride. My hesitation went from 2-3000 RPMs to 4-5000RPMs. Improvement. Came back and taped up the filter a little more than 3 3/4 of the way. Went for a ride and essentially it was gone. Still has a little studded at higher RPMs but to be expected since the carbs are set to a different air flow.

    I’m thinking I need to put bigger jets in. I am currently running the stock jets from alphamoto #40 and #110. Do you have any suggestions what I should up the size to?

    Thanks
     
    Austin Ramey, Apr 28, 2019
    #54
  5. Polock

    Polock Well-Known Member

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    what kind of air filter is on it?
     
    Polock, Apr 28, 2019
    #55
  6. Austin Ramey

    Austin Ramey Member

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    UNI high flow. K&N style
     
    Austin Ramey, Apr 28, 2019
    #56
  7. Austin Ramey

    Austin Ramey Member

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    Original intake set up as well 1 big filter. No pods
     
    Austin Ramey, Apr 28, 2019
    #57
  8. Polock

    Polock Well-Known Member

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    get yourself a oem filter, i think your problems will go away
    i used two layers of UNI foam on a stock frame and had those kinds of problems
     
    Polock, Apr 28, 2019
    #58
    k-moe likes this.
  9. Austin Ramey

    Austin Ramey Member

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    I will try that. Thanks
     
    Austin Ramey, Apr 28, 2019
    #59
  10. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    +1
    I have a K&N.
    It sits on my shelf of mistakes.
     
    k-moe, Apr 28, 2019
    #60
  11. Austin Ramey

    Austin Ramey Member

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    Does anyone know who sells them? Besides eBay
     
    Austin Ramey, Apr 28, 2019
    #61
  12. Austin Ramey

    Austin Ramey Member

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    What filter do you recommend? The stock Yamaha one or Emgo makes one as well. They say it meets and exceeds OEM Paper filters
     
    Austin Ramey, Apr 28, 2019
    #62
  13. Ryengoth

    Ryengoth Active Member

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    I'm curious on Emgo opinions as well. The OE filter I have is beat up pretty bad. So far I've been pleased with Emgo quality, but air filter elements can cause you tuning headaches if the media does not have the same flow restriction as OE.
     
    Ryengoth, Apr 29, 2019
    #63
    Austin Ramey likes this.
  14. XJ550H

    XJ550H Well-Known Member Premium Member

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    emgo works well
     
    XJ550H, Apr 29, 2019
    #64
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  15. Austin Ramey

    Austin Ramey Member

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    Thanks
     
    Austin Ramey, Apr 29, 2019
    #65
  16. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    IIRC EMGO makes the OEM filter too.
     
    k-moe, Apr 29, 2019
    #66
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  17. Austin Ramey

    Austin Ramey Member

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    Ok thanks for all the help to everyone here. I just need a little bit more advice. I’m going to start over on my carbs now. Can someone please tell me a step by step procedure for the carb set up from scratch. When I set the idle mixture screw 2.5 full turns out. Where should I set my idle screw at etc. and how should I proceed from there.

    Thanks
     
    Austin Ramey, May 25, 2019
    #67
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