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I have a 05 sportsman 400 that dies when you give it throttle but idles perfect

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  • 485 Answers

Check the timing and the fuel mixture.

Posted on Jan 16, 2014

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Posted on Jan 02, 2017

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SOURCE: engine on my 04 sportsman 400 wo'nt idle unlesss

there is an electronic position sensor in the throttle housing and if the throttle cable sticks even a little the sensor interrupts the flow of electricity and disables the engine to prevent loss of control so chase down your cable and lubricate it and make sure you have full range of movement

Posted on Apr 03, 2009

  • 1 Answer

SOURCE: backfires at half to full throttle, idle is ok, low rpm

hi how are you

Posted on May 24, 2009

SOURCE: Stalling out

I am assuming that your unit has fuel injection. Sounds like you might have a clogged fuel injector. Recomended is Polaris fuel injector cleaner but I believe you can use fuel injector cleaner from a part store but make sure it is diluted according to the instructions. However, being that your unit is a 2009 model, I would think that any polaris dealer would cover this under warranty being less then 1 yr old. If they won't cover the repair, then try injector cleaner. Good luck and happy trails.
Dave k

Posted on Aug 29, 2009

  • 93 Answers

SOURCE: Polaris Sportsman 90 - stalls

Is the choke in the on position? Have you warmed it up enough?

Posted on Sep 11, 2009

  • 38 Answers

SOURCE: I have a 2006 Polaris 800 sportsman and it won't stay idleing

adjust the idle screw

Posted on Oct 01, 2009

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I have a 05 polaris sportsman 400ho...it starts but as soon as i let the key go it turns off...i can give gas and the rpm's go up but once i let the key go it dies...any suggestions? Thanks.


most of the time i have found on the polaris machines the key switch itself fails. has a replacement key switch been tried?

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Starts and idles fine runs half throttle when fuel is applied


Harry, dirty carb or injectors.
Check the attached links,Manuals and guides, Good luck with your Bike
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

ATV TROUBLESHOOTING AND MAINTENANCE
ATV Service and Repair Manuals
http://www.carlsalter.com/motorcycle-manuals.asp

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Why does it idle rough and dies when throttle is pressed?


dirty carb, bad fuel, dirty air filter... all of the above

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The clutch is not totally disingauging.

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Starts and idles but has no power. What might cause this?


Its either needs the fuel system, including professional carb cleaning, or there is a ignition system problem.
Its probably the carb!!!!!

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Engine won't idle /sometimes backfires


Check the MAF-MAP SENCER or it's a throttle position sencer is bad check both by replacing them and see if it works or the last result is idle control valve

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1 Answer

How to turn up idle on 2013 polaris sportsman 500 ho


follow ur throttle cable down to cars there should be a plastic screw close to cable to adjust idea but with polaris that screw can be hard to find with all the plasticc they put in way but if u can see carbs easy enough u will see the idle screw

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