97 XLT Backfire - HCS Snowmobile Forums

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Old 01-15-2012, 11:34 AM   #1 (permalink)
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Default 97 XLT Backfire

Hi all, my 97 XLT touring developed a slight backfire yesterday during a ride. It only happend once in a while and only while letting off after giving it a good amount of throttle. It was very random and only happened occasionally. It was not a real big loud backfire but almost like a little miss. I did chnge plugs right after it started doing this and it did not resolve the issue. I will check for air leaks around the boots and the seals the next time I'm by my sled. I also so read some things about the throttle stops in the kill switch I can check. Any other ideas????
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Old 01-18-2012, 08:40 AM   #2 (permalink)
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Did it backfire through the exhaust or the carb?
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Old 01-18-2012, 04:48 PM   #3 (permalink)
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Sounded like the carbs to me. It wasn't really a loud backfire but a popping noise.....not very loud at all.
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Old 01-19-2012, 09:46 AM   #4 (permalink)
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A backfire through the carb usually means its a touch lean. Check for intake air leaks, and check to make the fuel/air mixture screws are set properly at 1 to 1.5 turns out.
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Old 01-19-2012, 02:44 PM   #5 (permalink)
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If nothing obvious fixes it,pull your y-pipe and carbs and look for a broken piston skirt.
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Old 01-21-2012, 09:05 PM   #6 (permalink)
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Water in the fuel will do that,A little fuel treatment will fix that
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Old 01-22-2012, 08:37 AM   #7 (permalink)
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Checked all of the obvious things nothing stood out....Put over 200 miles on since it first did this and has not done it since. I do not have the foam cover for the airbox so I am guessing it sucked in a little snow. I have ordered the foam. Thanks for all the replys!!!
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