I have an 2006 Ranger 500 EFI with 500 hours on it

SOURCE: 97 Polaris Xplorer 500 4X4 rev problem

REPLACE THE CAMSHAFT !!!,,, HAVE A LOOK AT CAMSHAFT , EXHAUST LOBE IS PROBABLY WORE RIGHT OFF....

SOURCE: 2006 polaris sportman 500 HO overheating problem HELP!!!!!!

Check that the electric fan motor comes on ,and check the radiator for mud and debris u may also need new oil and filter change,All of these things could make it run hot 1 more thing roll it in neutral 2 make sure breaks arent hanging up.

SOURCE: 1998 polaris sportsman 500 losing power when hot

try head gasket as this is very comen on atvs

SOURCE: I have a 2005 Polaris 700 EFI. Recently it has

mine did the same thing & then it finaly quit running altogether...the gas gauge stoped showing in the display also. I pulled the old fuel pump out & replaced it with one out of a 97 ford areostar witch has an almost indentical pump & now the machine runs like new...and my gas gauge started showing again & I saved myself 500 bucks because the pump i used was gave to me...lol

SOURCE: Service manual for a 2006 500 Polaris Sportsman HO

I have a 2006 Sportstman 500HO ATV, EFI. Sometimes it will run 100% correct, other times it will start, idle fine but then when giving it throttle will will start to surge almost like it's hitting a rev limited. Sometimes it will backfire and stall. I already replaced fuel filter, flushed the fuel lines and gave it fresh gas and installed a new spark plug, but no good. I also checked the throttle switch and it's not making contact to stall it. I download the service manaul and tested each sensor and they tested fine which is probablt why I get no check engine light.
This ATV is mainly used to plow snow in my driveway, no salt. It's used around my property but very lightly. It's still as clean as it was when I bought it and it doesn't have but about 40 hours on it.
Polaris 500 HO EFI 4x4 ATV: Vin# 4XAMH50A56B707664 purchased 6-8-2006

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