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Discussion Starter #1
Hoping you guys could help. I have a 2011 Polaris sportsman 550 EFI with 300hrs on it. It is running rough and skipping at idle (when I can get it to idle) it sometimes looses power and dies on me while riding also. I have gotten codes 520193-7 and 168-3 but they are not showing up currently. I have a new voltage regulator on the way, but could anyone offer any more help?
Anything is appreciated! Thanks in advance!
 

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I'd grab a fuel pressure reading.
 

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Have you checked the valve clearances?
 

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58psi +/- 2psi
 

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You will probably need a service manual.
 
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