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07-08-2016, 09:15 AM | #1 |
Not Yet Wild
Join Date: Jun 2013
Location: Ireland
Posts: 28
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Occasional Backfire 1998 4 stroke TXT
1998 TXT 4 stroke almost finalised this restoration.... mechanically have replaced driven clutch, drive belt, starter/gen belt, solenoid, voltage regulator, starter/gen brushes, gear change cables, cleaned carb, plugs, checked all wiring, new fuel pump & filter .... but have occassional backfiring...... have read through various threads here then checked carb butterfly is closing fully when accelerator pedal is released & adjusted valve gaps to .004 per manual.....plugs appear normal on removal. Any ideas gratefully received ???
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07-09-2016, 12:01 PM | #2 |
Getting Wild
Join Date: Jun 2011
Location: Chicagoland
Posts: 105
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Re: Occasional Backfire 1998 4 stroke TXT
If it's running too rich or the carb float level is too high, raw gas might be getting in the exhaust and igniting causing the backfire.
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07-09-2016, 12:43 PM | #3 | |
Gone Wild
Join Date: Aug 2009
Location: Santuck,Al
Posts: 1,747
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Re: Occasional Backfire 1998 4 stroke TXT
Quote:
Be sure that the carb butterfly doesn't open ANY before you here the micro switch click while pressing the accelerator down. |
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07-09-2016, 05:18 PM | #4 |
Not Yet Wild
Join Date: Jun 2013
Location: Ireland
Posts: 28
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Re: Occasional Backfire 1998 4 stroke TXT
Thanks for your suggestions I will check carb again & also the timing of butterfly v microswitch operations....& let you know results....with thanks,
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07-09-2016, 06:28 PM | #5 | |
Gone Wild
Join Date: Aug 2009
Location: Santuck,Al
Posts: 1,747
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Re: Occasional Backfire 1998 4 stroke TXT
Quote:
http://www.buggiesgonewild.com/ezgo-...4-strokes.html |
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07-10-2016, 08:27 AM | #6 |
Not Yet Wild
Join Date: Jun 2013
Location: Ireland
Posts: 28
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Re: Occasional Backfire 1998 4 stroke TXT
thanks for the link....I will read up on it.....initial inspection tells me that microswitch/solenoid activation is either OK or at worst simultaneous so perhaps I need to back off the butterfly operation by adjusting the various linkages...best read up before I play with it...thanks
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07-11-2016, 06:38 AM | #7 |
Not Yet Wild
Join Date: Jun 2013
Location: Ireland
Posts: 28
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Re: Occasional Backfire 1998 4 stroke TXT
thanks for link.... that primarily focuses on the governer adjustment which I understand.... I dont want to make this cart go faster at the moment just to stop the occasional backfire..... there are a few linkages between that mechanism & the accelerator >carb butterfly should I be shortening the main bar or lengthening it to try to marginally delay the butterfly ?
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07-19-2016, 01:28 AM | #8 |
Not Yet Wild
Join Date: Jun 2013
Location: Ireland
Posts: 28
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Re: Occasional Backfire 1998 4 stroke TXT
Once again a big thank you to all contributors to this thread. I have now solved the problem. I did adjust the carb linkage to marginally delay butterfly moving until after the solenoid kicked in.... I also re-checked & re-adjusted the valve openings...voila....all good...power perfect & no backfires... thanks folks
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07-19-2016, 06:21 AM | #9 | |
Gone Wild
Join Date: Aug 2009
Location: Santuck,Al
Posts: 1,747
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Re: Occasional Backfire 1998 4 stroke TXT
Quote:
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Tags |
backfire, restoration, txt ez go |
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