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Thread: 350x loss of power

  1. 02-17-2011, 05:45 PM #1
    Nicholas5225
    Nicholas5225 is offline New to the board Arm chair racerNew to the board
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    350x loss of power

    Ok I have purchased another 350x. This thing is sharp and has been very well taken care of. I took it out a couple weeks ago for the first time. I was riding it pretty hard then all of sudden it died in mid throttle. I couldn't get it to restart until it cooled down. I am not sure if it was getting spark as I didnt have a wrench in the field. I took it home and put a new spark plug in it, then also cleaned the carb. Rode it a little bit then let it idle for about 30 minutes. No issues. I didn't ride it near as hard tho. If this comes back what should I look at? Obiviously check for spark but besides that? Thanks for any and all help.
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  2. 02-17-2011, 06:06 PM #2
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    sittinguy
    sittinguy is offline Titanium Balls Arm chair racerAt the back of the pack
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    Sounds like you just fouled a plug maybe?
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  3. 03-13-2011, 10:09 PM #3
    Philaminoooo
    Philaminoooo is offline Registered User New to the board
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    I had same thing happen to me yesterday with a 350X I JUST got a week ago. I am pissed! I traded an original 85R for it! Anyway, whenever I fouled a plug the bike stopped running. You're saying a loss of power can be a fouled plug? I checked air filter and the bike's running, but has lost her ass. Barely gets up hills anymore. I just hope it's not the top end going.
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  4. 03-14-2011, 02:56 PM #4
    Nicholas5225
    Nicholas5225 is offline New to the board Arm chair racerNew to the board
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    When I say loss of power I mean everything. As in won't start. I replaced the plug and am yet to go back out. Thinking it was probably a fouled plug. I might have some jetting issues also as I have a supertrapp exhaust with factory jets.
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  5. 03-14-2011, 03:40 PM #5
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    atc350xer
    atc350xer is offline The Enthusiast. Teaching quads a lesson
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    Quote Originally Posted by sittinguy View Post
    Sounds like you just fouled a plug maybe?
    Absolutely. Usually not in mid-ride though... when I've seen it happen, it was when it's hot and you shut down and try to restart.


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  6. 03-16-2011, 11:28 AM #6
    Nicholas5225
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    I'm hoping it is not a coil issue then. I guess we will find out soon...
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  7. 04-09-2011, 11:40 PM #7
    Nicholas5225
    Nicholas5225 is offline New to the board Arm chair racerNew to the board
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    Well looks like a cdi box is bad. Used an OHM tester to find it. Now I Have to find one (
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  8. 04-09-2011, 11:54 PM #8
    snakpacs
    snakpacs is offline New to the board Arm chair racerNew to the board
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    maybe one of your wires in the cdi harness wore through the insulation. happened to my buddy's
    1986 200x
    1980 cb750f
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  9. 04-09-2011, 11:57 PM #9
    snakpacs
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    with his there was a realllllly tiny wear on one of the insulators and it would intermittently short out. i think he wound up relocating the box after finding the broken wire
    1986 200x
    1980 cb750f
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  10. 04-11-2011, 08:37 AM #10
    Nicholas5225
    Nicholas5225 is offline New to the board Arm chair racerNew to the board
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    I went through the manual and tested starting at the coil. the coil tested good, then I got to the cdi box. Took it out and did the test exactly as the manual stated. The IGN part of the CDI starts to read then drops flat. Got another CDI on the way.
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