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Thread: 2015 Massimo MSU 700

  1. #1
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    Sep 2017
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    2015 Massimo MSU 700

    Bought my first UTV and it's a fixer upper with blown rear end and i have a question. The oxygen sensor on the exhaust is welded on, has anybody seen this before i just can't understand what the purpose is for welding it. I can't seem to get the muffler off with the oxygen sensor in place and of course i can't unscrew it. Looks like my only choice is to take the exhaust off at the head.

    I can't believe this was done at the factory but you never know.

  2. #2
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    Jul 2013
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    Arizona
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    I have a 2013 HiSun 500 which is very similar. A few weeks ago the oxygen sensor popped off. Apparently it unscrewed from vibrations; I was able to put some thread lock on it and put it back in. Perhaps at some time the same thing happened to yours and the threads were so damaged that it had to be welded in?

  3. #3
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    Sep 2017
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    I see your from AZ. so am I born in Yuma, anyway thank's for the info that could explain the weld. Thank's again.

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