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post #1 of 11 (permalink) Old 02-18-2010, 04:51 PM Thread Starter
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Idle and clutch engagment

I have a 96 indy trail 488 and was wondering what it should idle at. It idles high around 2500 until it gets warm then it idles around 2000. If i kick the choke on for a second it will idle down to about 1600 and stay there is this normal? Also I cleaned my clutch but it doesnt engage until around 3500 and its kinda harsh is there something wrong or is it normal for this machine. Thanks

1995 Polaris 600 XCR- needs motor
1996 Polaris Indy Trail 488
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post #2 of 11 (permalink) Old 02-18-2010, 05:21 PM
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i wonder if turning the idle screw a hair or two would help. my sled is an 05 but all polaris sleds ive ownded the clutch engages around 3800-4000rpm

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post #3 of 11 (permalink) Old 02-18-2010, 06:55 PM
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it wants to idle at 2000/2200rpm.

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post #4 of 11 (permalink) Old 02-18-2010, 08:53 PM
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thats why if you turn the idle screw out, i think, it would lower your idle. when i bought my last sled used it would take for ever to idle down after riding. turned the idle down and now it goes down almost right away and at 1800 or so which is where it should be

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post #5 of 11 (permalink) Old 02-18-2010, 09:04 PM Thread Starter
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Ok so is the idle good or bad? If its bad how do i ajust the idle on one of these. Iv heard there should be a plate or a line that connects the two carbs and changes the idle but i cant seem to find it.

1995 Polaris 600 XCR- needs motor
1996 Polaris Indy Trail 488
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post #6 of 11 (permalink) Old 02-18-2010, 11:14 PM
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my last two sleds were 2000's year models and the idle screw are right near the top of the carbs. i mean looking down on them they are in plain site. they have a philips screw head but also a larger head where you can just turn it by hand. i did search your slead and found this carb thread. scroll to section 15-11 and look at part number 29. hope that helps ya

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post #7 of 11 (permalink) Old 02-18-2010, 11:16 PM
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haha forgot to post thread...http://recreationsupply.ca/pdf/2006-15_Carburetor.pdf

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post #8 of 11 (permalink) Old 02-19-2010, 05:43 AM Thread Starter
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Thanks jdubb11 that picture is really helpful. Im gonna try to mess with it when i get home today and see what i get. Thanks again.

1995 Polaris 600 XCR- needs motor
1996 Polaris Indy Trail 488
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post #9 of 11 (permalink) Old 02-19-2010, 06:33 AM
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your 488 has 2 idle screws. One for each carb. The newer liberty motors 2001 and up have rack style carbs which only have the 1 idle screw for both carbs...

You need to start the engine, and turn the screws evenly counter clockwise until the idle is 1800-2000. I mean slowly, and evenly. And give your throttle a flip everytime you loosen the screws. The main thing is to get them even. If its not a big chore, take the air box off. (Most airbox's are no easy job though) Look in the throat of the carb and see if the slides are pulling up at the same time. If they aren't, you'll need to set them and thats another 10 post thread...


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White EPI primary spring with 10 weights
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post #10 of 11 (permalink) Old 02-19-2010, 05:10 PM
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Specified idle rpm for the 1996 indy trail 488 is 1600 when fully warmed up. 3500 rpm clutch engagement is too low and will cost you bottom end performance. Inspect the primary clutch for worn or sticking parts and repair as needed. Then replace the primary spring as they fatigue with age.


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post #11 of 11 (permalink) Old 02-19-2010, 10:23 PM Thread Starter
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Thanks for all the replies guys. I adjusted my idle today and got it down around 1700 when warmed up. I have inspected the clutches and they seem ok and clean and when i rode it today and the clutches are engaging around 3800 which i thought was high but maybe not for this type of sled. I think im just gonna run since its running perfect other than that. Thanks again

1995 Polaris 600 XCR- needs motor
1996 Polaris Indy Trail 488
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