Question about Polaris ATV

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I have a 2003 600 sportsman that makes a loud knocking sound when moving. boots all seem intact. sometimes it seems it is louder when in a turn but hard to say. Knock knock knock. My 2004 400 is starting to make the same sound now???

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They are magnetic activated check the small wires coming down along each shock to see if one is broken. If not sounds like cv joint came apart and needs rebuild

Posted on Aug 20, 2014

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It is either your inner or outter rear CV joint! replace drive axle assembly which is cheaper than replacing just the joint! sometimes repacking the joints helps but only sometimes

Posted on Oct 31, 2012


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Posted on Jan 02, 2017

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SOURCE: 2004polris sportsman 500 ho engine noise

I have a 2004 Polaris 500 with the same knock. Tear down shows tight lower rod bearing and wrist pin. The piston fits tight at .0015 clearance. The balancer seems OK also but did not split the crankcase.

Posted on Jun 03, 2009

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SOURCE: 2006 450 sportsman. Will start&idle.

Yes it is vacuum activated, I would check your vacuum lines for cracks and make sure they are snug. I would also check your air filter. If all looks good and it still happens I would clean youe carb because some dirt, rust or debris could have made its way there causing the inlet needle valve to be stuck open or it could be worn. Hope this helped

Posted on Mar 27, 2010

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1 Answer

What makes clutch not release on 500 Polaris sportsman

Check the alignment of your clutch and the rear pulley. If they are not aligned the bike will seem like always moving forward. They may require spacers to align correctly.

Nov 20, 2016 | ATVs

1 Answer

I have a 2010 Polaris Sportsman 300. When in gear you really have to give it a lot of gas to get it to move. I have changed the oil and filter and it seems to be getting worse. Any suggestions?

are the brakes stuck? jack it up and try spinning the wheels.
could be the centrifugal clutch on the cvt or the belt slipping.

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1999 Sportsman 335 4x4. Why doesn't it seem "right"?

Make sure it is the recommended size. Can you adjust the tension? Try some belt dressing, it's a spray that makes belts grab better. Good luck!

Feb 29, 2016 | Polaris ATV

1 Answer

Engine #EH068OLEO14....seemed to be alittle hard to put into gear,but all of a sudden it would not move onceyou put it into gear, has low miles

Pam, sound like it is trying to lock up between gears, if under warranty take it in.
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 Service and Repair Manuals
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Jan 17, 2016 | Polaris 2004 Sportsman 700 Twin

2 Answers

I lost all forward and reverse drives. u joints intact. thoughts?

best guess, this belt broke

Mar 08, 2015 | Polaris 2007 Sportsman 700 EFI

1 Answer

Polaris sportsman 500 HO shows hot check engin? what must i do

check your timing advance. It may be advanced a little too much. If that is okay, then make sure your spark plug is the proper one and not a sub. Most ATV's use DENSO plugs and these seem to work the best. (Having a spark with a higher heat range will cause the overheat condition). The other thing is your mixture... you may be running a tad rich.. lean it up 1/8 of a turn. Finally, remove the exhaust pipe and see if they is carbon build-up at the exhaust port... lean it over and remove all you can, careful not to allow any to fall into the engine. (Blocking the exhaust will cause a dramatic temperature increase.)

Mar 05, 2015 | Polaris 2008 Sportsman 500 H.O

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Atv transmission

sounds like the connecting rod on the crankshaft.
i would inspect the primary clutch first before an engine teardown. Sometimes the engine shifts on the engine mounts and the clutch hits the cover, also check to make sure belt is not slapping around in cover.

Jun 15, 2013 | Polaris 2005 Sportsman 500 H.O

2 Answers

Where is compression release for polaris sportsman 4x4 atv

Polaris uses an automatic decompression that sits in the exhaust cam. There is not an external lever as there is on older Kawasaki's and dirtbikes. What seems to be the issue as to why you're looking for a compression release?

Sep 21, 2011 | Polaris ATV

1 Answer

2005 sportsman noise in the rear area of the machine

The belt and pulleys are probably not the cause with the sound you are describing. To me it sounds more mechanical when you say grinding. Have you checked the rear dif?

Mar 17, 2017 | Polaris ATV

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