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Thread: backfiring?? what is causing this??

  1. 03-29-2004, 01:47 AM #1
    Paul
    Paul is offline First Time Rider Arm chair racerNew to the board
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    backfiring?? what is causing this??

    I start up my atc and it sounds like it backfires but it comes out the intake?? and it stall the trike.. what could be going on?? could the carb have anything to do with this at all??

    THanks
    225dx, My first atv and I am lovin it.
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  2. 03-29-2004, 04:11 AM #2
    atcmatt
    atcmatt is offline Power User Got the holeshot
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    Yeh we have an old xl250 trail bike that does that. I would also like to know why??? Kinda funny how it blows out of the intake.....

    Matt
    1980 ATC 70 Needs Restoration
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  3. 03-29-2004, 10:01 AM #3
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    atc krazy
    atc krazy is offline First Time Rider Arm chair racerNew to the board
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    do u have an air filter on your trike and what type of gas u using because the same thing hapend to me and there was no air filter in the box and i just used panty hose
    three wheeling for life

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  4. 03-29-2004, 11:19 AM #4
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    Mobular
    Mobular is offline Got The Holeshot Arm chair racerJust too addicted
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    Intake backfiring tends to be a lean fuel situation, or a timing issue.
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  5. 03-29-2004, 01:03 PM #5
    compaqkoci
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    umm

    could that be from old or brokken reeds?
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  6. 03-29-2004, 08:55 PM #6
    endezeichen
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    Try adjusting your valve clearance. Woked for me.
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  7. 03-29-2004, 08:57 PM #7
    endezeichen
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    lol forget above post.... i should have read the question first.
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  8. 03-29-2004, 11:04 PM #8
    yamaha200E
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    well my ytm did that check the guts of trailprotrailpro carb. mine was due to dryroptted floats and clogged up jets. hope this helps ya
    83 ytm200E SOLD & mid 80 honda 185s

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  9. 03-30-2004, 09:57 AM #9
    trimoto
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    my ytm200 did the exact same thing when I bought it....it sat a long time.
    I tore apart the carbs, took a little piece of wire and cleaned out every part...I found some tiny pieces of gook in there. then I adjusted the air screw and voila! now she purrs like a kitten!
    1983 Yamaha YTM200K Tri-moto
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  10. 07-21-2006, 06:45 PM #10
    rally4x4racer's Avatar
    rally4x4racer
    rally4x4racer is offline Got The Holeshot Arm chair racerJust too addicted
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    this is happening to my 110 - i went with a k&n air filter attatched right at the back of the carb. I had a #92 main in it and could not get it lean enough and the next size down i went #85, it started poppin out the intake..

    im guessing it can backfire out the intake if it is rich or lean depending on how the engine is timed...
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  11. 07-22-2006, 08:39 AM #11
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    Unclediezel
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    Lean fuel burns at a faster rate, and is also easier to ignite, Any heat left over from the combustion cycle, can ignite a leasn mix before it actually travels down into the chamber.--Leaky valves, or worn out reeds can also do the same--but check the "SIMPLE" before the "SUBLIME"
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  12. 07-23-2006, 03:12 PM #12
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    bonkers_200s
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    Check the simple indead, take a look at the needle in the throttle assembly that sits in the ventura. Make sure it's in the stock position for your machine, then play with it from there. I had the putters and back fires, a good cleaning and moving the needle stopped it for me.
    If you can't fix it with a , its an electrical problem.

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  13. 07-23-2006, 03:36 PM #13
    88 Turbo Coupe
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    My yamaha did the same thing. Had to adjust the float. No problem now.
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  14. 07-24-2006, 09:16 AM #14
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    Erics350x
    Erics350x is offline Power User Got the holeshot
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    what kind of trike are we talking about. if its a 4 stroke i would say timing problem. 2 sroke prolly the flywheel key.
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  15. 07-24-2006, 05:17 PM #15
    rally4x4racer's Avatar
    rally4x4racer
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    flywheel key is a good one!! I had mine messed up and couldnt get it to run for crap

    I take it that was a "NO", Unclediezel?
    quiet people seem intelligent
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