Arctic Cat EXT 580 clutch problems...HELP!! - HCS Snowmobile Forums

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Old 11-15-2010, 11:09 AM   #1 (permalink)
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Question Arctic Cat EXT 580 clutch problems...HELP!!

I have an AC 580 EFI MC. My drive clutch (or primary?) has new weights in it 49.5 grams and has a new red spring. I just recently replaced the roller bushings on the spider, they are brand new with brand new pins for the weights.

The problem...for some reason, I have to rev the sled up to about 4500 to 5000 rpms before the sled moves and my top speed is only about 60 MPH. I'm at 7000 rpms at 30 MPH!!!!! I did the repairs over the summer so the sled sat that whole time.

Is this a secondary clutch issue? I never touched the secondary over the summer. I have done the obviouse to fix the problem...new plugs, new belt, ect.

I need help and really appreciate any advice!!!!
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Old 11-15-2010, 02:55 PM   #2 (permalink)
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Current Sled(s): 06" F 7- R
Previous Sled(s): 00 ' ZR 500 96" ZR 580 ,,Z440
Location: P.E.I CANADA
Favorite Riding Area: 660FT
Riding Since: 1970
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Originally Posted by bigben004 View Post
I have an AC 580 EFI MC. My drive clutch (or primary?) has new weights in it 49.5 grams and has a new red spring. I just recently replaced the roller bushings on the spider, they are brand new with brand new pins for the weights.

The problem...for some reason, I have to rev the sled up to about 4500 to 5000 rpms before the sled moves and my top speed is only about 60 MPH. I'm at 7000 rpms at 30 MPH!!!!! I did the repairs over the summer so the sled sat that whole time.

Is this a secondary clutch issue? I never touched the secondary over the summer. I have done the obviouse to fix the problem...new plugs, new belt, ect.

I need help and really appreciate any advice!!!!

With that set up engagement should be around 3800,, seems like something is sticking..jack the sleds up and rev it up and watch the clutches and see how they are working,,,,R2R
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Old 11-15-2010, 11:19 PM   #3 (permalink)
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I did jack up the sled an it seems like the clutches are working properly...one thing though, when I try to remove the belt, the secondary clutch sticks open and doesn't spring shut.

Could it be that I need to go over my secondary clutch? or could it be that my red spring is the cause? Everything worked perfectly last year till I replaced some worn parts...UGHHH.
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Old 11-16-2010, 06:11 AM   #4 (permalink)
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Current Sled(s): 06" F 7- R
Previous Sled(s): 00 ' ZR 500 96" ZR 580 ,,Z440
Location: P.E.I CANADA
Favorite Riding Area: 660FT
Riding Since: 1970
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Originally Posted by bigben004 View Post
I did jack up the sled an it seems like the clutches are working properly...one thing though, when I try to remove the belt, the secondary clutch sticks open and doesn't spring shut.

Could it be that I need to go over my secondary clutch? or could it be that my red spring is the cause? Everything worked perfectly last year till I replaced some worn parts...UGHHH.
yes,you should go ever it too..you might not have enough twist on it but that won't efferect your engagement so you still have a problem there.....R2R
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Old 11-16-2010, 10:03 PM   #5 (permalink)
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Current Sled(s): '12 TurboLXR/'07 F1000
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EXT 580 ?? Did you put the newer 6/9 tower CAT spring in a Comet clutch? Try the old spring again, see if the prob goes away.
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Old 11-17-2010, 10:48 AM   #6 (permalink)
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Yes, EXT 580 EFI...I did use the same spring, i didn't know that mattered? Does it? It actually was just the reverse, the old comet sring in a CAT clutch...could that be my problem?
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Old 11-17-2010, 12:26 PM   #7 (permalink)
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Current Sled(s): 06" F 7- R
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Riding Since: 1970
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Yes , it does,, the new clutches use a different diameter spring and it will bind in the older comet..Ok,,hold on, you have the new clutch on your sled? that could be part of it, you have to use the arcto springs with the new clutch,, what does you sle rev top speed now? ,, it could be cal all wrong ,, R2R
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Last edited by ready2race; 11-17-2010 at 12:30 PM.
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Old 11-18-2010, 02:57 AM   #8 (permalink)
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Current Sled(s): 2006 summit 800
Previous Sled(s): 95 cat 580, 90 phazer 480
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I dont mean to thread jack......but is it bad i have never done any maintenance to my cat...except new plugs
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Old 11-18-2010, 06:53 AM   #9 (permalink)
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Current Sled(s): 06" F 7- R
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depends how many miles you have but you should do reg maintenance, long as it's working fine your pretty ok..clutches and skid are the main thing, they are the biggest wear part....R2R
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Old 03-31-2011, 07:12 PM   #10 (permalink)
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how would one go about doing these things? The skid is what the track rides on right? I don't ride much anymore but I would like to try an keep her in top notch shape! :P
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