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Discussion Starter #1 (Edited)
I have 570 Polaris 2014 . Is backfiring and popping and misfireing. I put on a new spark plug and new coil and I checked the fuel pump Reading 52+Psi nothing wrong with my fuel u pump .and new Air filter and new strainer on the bottom of the fuel pump too . And Stalling and backing 1250 1200 rpm and 1100 rpm my Fan kicks in to . I got $800 in to it. And Lo 8 or lo 10.7 too I just need help
 

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Is that Lo 8 or lo 10.7 regarding volts? If so, next step is a voltage regulator. But also check your throttle cable adjustment!
 

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Sounds like a charging system problem to me to.
 
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