07 500 efi moving at idle - Polaris ATV Forum
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post #1 of 6 (permalink) Old 02-24-2011, 08:21 AM Thread Starter
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07 500 efi moving at idle

Have an 07 Sportsman 500efi that is moving in gear at idle. Yes I know that this us usually due to a high idle, but the idel is good. Dealer wants to install some shims in the Clutch but I thought that only fixed the clunk when you shifted into reverse or high/low. Could dust/dirt in the PVT cause the belt to grab making the belt grab? What do you guys/girls think?
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post #2 of 6 (permalink) Old 02-24-2011, 08:38 AM
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this would be a clutch alignment problem & yes shims will fix it sometimes.possible you could have a broken trans or motor mount to.
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post #3 of 6 (permalink) Old 02-24-2011, 09:25 AM
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Welcome to the board!

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post #4 of 6 (permalink) Old 02-24-2011, 09:49 AM Thread Starter
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Thanks for the Welcome..

I have a feeling that the mis-allignment is the isssue. Its my Dad's 4 wheeler and I was just kind of checking into possible causes before he took it in. He had a big big wreck with it 6 months ago and when it was all back together is when the problem started. Im sure something got knocked a little out of wack and is now off. Weird thing is that it dosent do it all the time.. maybe 7 out of 10..

Thanks for the info though.. Much appreciated.
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post #5 of 6 (permalink) Old 02-25-2011, 01:04 PM
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I had same problem with 2001 550 sportsman, alignment good, belt good, dealer replaced what he called grooved primary clutch...$400! Problem came back within 100 miles of riding!

Son and I decided to look into it ourselves, tested with clutch cover off, close observation looking and listening, we determined that the engine braking portion of the primary clutch was not releasing as it should, putting a load on the gear box, making it very difficult to shift, and causing the bike to creep at idle rpms.

Cheap fix...We simply changed from the engine braking system model drive belt (which is slightly smaller in diameter than standard) to a standard sized belt (for machines without engine braking clutch installed). The standard sized belt rides just a tad higher in the primary clutch, and does not engage the engine braking portion of same, and does not ride in the "groove" the dealer described.

The creeping and shifting difficulty was gone! Have ridden in this configuration for several hundred miles since with no difficulties. And....there still is noticable engine braking available, though not as much as before.

Go figure. May not be your issue, but worth considering.

Riverton, Utah
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post #6 of 6 (permalink) Old 02-25-2011, 03:03 PM
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Make sure you check the engine mounts also.


2007 Sportsman 800 efi , L&R tall windshield, Viper Max 4000 lb. winch with 3/16" Amsteel rope by Atv Winch Rope, 25' Amsteel tow rope by Atv Winch Rope, RDC fairlead, RDC deluxe gas cap, RDC shifter, RDC overflow bottle cap, RDC 2" lift , 27" Maxxis bighorns s/w on Vision Outback 12" wheels, Uni air filter, Dalton o/bl primary clutch spring, front and rear brushguard, front and rear rack extensions, and a SanAngelo backrest
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