97 Polaris 400 sport 2 stroke big bore 440 - Polaris ATV Forum
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post #1 of 6 (permalink) Old 09-04-2012, 07:24 PM Thread Starter
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97 Polaris 400 sport 2 stroke big bore 440

We had this 4weeler for 3 days and while my hubby was riding it, it just stopped running. We cant get it to start so we can ride it.

What could be wrong with it?
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post #2 of 6 (permalink) Old 09-04-2012, 08:08 PM
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Welcome to the board!
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post #3 of 6 (permalink) Old 09-05-2012, 08:05 AM
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Check for spark, check for compression, getting fuel at the carb.
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post #4 of 6 (permalink) Old 09-05-2012, 09:07 AM Thread Starter
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We did check the sparkplug and its good. There is only 15lbs of compression and there should be over 100lbs.
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post #5 of 6 (permalink) Old 09-05-2012, 09:20 AM
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There is your problem. At the least, the top end needs rebuilt.
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post #6 of 6 (permalink) Old 09-05-2012, 02:41 PM Thread Starter
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Thats what we are going to do. Is that the reason the compression is low because the top end needs rebuilt.
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