Hey i have a 2004 polaris sportsman 500 ho when it gets a little cool out it runs rough.When it neutral it runs fine i rev it up it runs perfect but when in gear and have the throttle at one speed it runs like crap if i give it more gas it semms to run better any sudgestions? thanks for your help.

 

did you check the air filter and vent lines for being blocked/pinched. does it take off fine w/ plenty of power or sluggish from the get go? does appling the choke seem to make it run better/worse? you can tell if it's a lack of fuel or too much by the way it reacts from the choke. does it start good when it's cold? any thing been done to the bike is it stock w/ good fuel in it and not old gas? just a couple of questions for ya.

 

I will check all those things and get back to you.Thanks for your help.

 

I checked the linesthey seem alright.It fires right up when i start it i pulled the choke when i was riding it didnt make a difference.Sometimes when its ideling it will shut off.the only thing that is not stock is the k&n filter.It seems at low speed it almost sounds like the plug is fouling then i give it gas it runs fine.

 

Do the easy things first. Change the plug, clean and oil the filter(if needed),if fuel is old (and doesn't have fuel stabilizer), drain and refill tank,may have to go into the carb,could be jets just needs to be cleaned. Plus fuel stabilizer is almost a requirement now if the atv isn't under constant use! Keep us updated. OPT

 

Will do thanks !

 

pour 2 oz per gallon of Seafoam in it and ride it also maybe some stabil, let us know if it improves