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Bike Popping and Backfiring

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  • Bike Popping and Backfiring

    My bike sat for about 6 weeks with the dust cover on it. Went to start it on Sunday to go for a ride with the wife. Slow to crank then the dreaded click-click-click. No problem, been a while. Grabbed the charger, let it build for a bit, then used boost to get it fired off. All it wanted to do was pop and backfire and not really rev. BUT it started so I headed to the local gas station to top it off with fresh fuel. Then it wouldn't start at the station...got my pickup and trailered it home. Figured stale fuel so pulled carburetor, sonic cleaned it, and re-installed. This made no change whatsoever so back to square one. I left it on the smart charger for the afternoon and tried it later that day and all was good...ran like it's supposed.

    So I'm assuming a battery without 100% charge is the culprit...and the battery is less than a year old. Could this situation be affecting the signal from the TPS to the ignition and causing the spark to be out of time? And I'm assuming the charging system doesn't have enough oomph to "charge" the battery...it just maintains as needed? I ask as I want to know and someone out there is bound to have experienced this as well. I have had this happen on two other occasions but cleaned the carb and it was better...but was on the charger while I was doing this. This time it was not.

    Just wanted to chat with someone about it and verify.

    Thank you.

  • #2
    Run a full tank of seafoam through it per instructions and ride it for a significant distance. You may have water or crud in the tank . Check the battery voltage as you are cranking it over.

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    • #3
      May not be a bad idea to check the voltage when the bike is running after you've given the battery a good thorough charge.

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      • #4
        fully charge the battery and check charge voltage. It wouldn't be anything to do with the TPS and timing but low voltage to the ignition system will do just what you described.

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        • #5
          After running fuel cleaner in your tank, remember that any gunk will collect into your fuel filter.

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          • #6
            My white bike didn't want to start this morning and when it did didn't want to Rev at all. Bad gas. Hanst been ridden much last few months. Out now burning the old gas out and will refill tank and throw in some seafoam. Common issue with old carb bikes for sure. Bad gas/water in gas will make it run like shit... No power.. Wants to die... Hard to start.
            LET'S RIDE

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