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anyone who owns, or has owned, a 580 efi, and has had motors blown or other problems, please respond to this. on the sleds that blew up, were they stock, stock chip, stock pipe, what grade fuel were you running, do you have a eghaust or temp guage? i just want to get the info on the sleds, because 580 blow up's are a big topic here.
 

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Even though i dont own one.  I will tell you about my experence with the 580.  

It was a 97 580 EFI.  It blew up in 2000.  It was mid season and i was driving it when all of a sudden it just stoped.  The track even locked for a few seconds.  I knew it was bad.  I couldnt even pull it over.  I felt so bad that i paid my friend half for the motor.  It has never been abused. Only drove it like i would anyother sled.  We are all driving doo's with no problems.  

I have to say onething about the 580 though.  It started and ran really good.  The Efi really worked.  But it had arctic cats reverse.  That broke about 3 times in the one season and the electric start broke in it also about once a year.  

Definetly not the sled i would look to buy.
 

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Had a 96 Pantera 580 EFI for 4 yrs, put on 1800 miles, only trouble was 1st season it did not start (once), dealer found a pint of gas in the exhaust pipe.  Dealer thought 1 of the injectors may have stuck open and allowed gas through???
After that it ran fine til I sold it(oh yeah, reverse chain hd to be tightened once also,never happened again)

Now I own a 00 Pantera 580, got about 1500 miles on it,no problems w/engine, rebuilt starter once!
Also own 00 ZL 580 EFI esr, got 1300 miles on it,no egine problems but lousy starter bolts keep snapping off and rebuilt starter twice
 

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I ran a 95 580EFI Pantera for the last 3yrs.  I put over 3000miles on it last season alone.  Never had any engine problems.

Once, wouldn't start, turned out to be a dead cell in the battery.  

Rebuilt the starter 2 times, and it still never lasted a season.  In my opinion, Cat does not know how to build a reliable starter.  I just pulled it, for the last year, and it always started on the 2nd or 3rd pull.

The only real issue with this engine, was that it was a fuel pig.  Thats half the reason I switched to a 700 tripple Doo.

FishHog
 

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I agree my pantera is a gas pig..Also i checked plugs and its always fouled,seems to be running rich or i have serious issues, but it only has 100 miles on it.
 

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What about a 580 non efi?I have a 94 with 3400 miles.The original owner said he never had a problem.Have these problems pertty much all been linked to the Efi models?(rods,etc.) ???
 

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What do you guy's consider a fuel pig?  My 00 Pantera and 00 ZL both get 10- 12 mpg. Have a buddy with a 99 Polaris 700 XCR that gets 4-5 mpg, now that I consider to be a gas hog!
 

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My 97 EXT 580 blew up real good see past postings.  Rings and conncting rod problems very common.  AC knows it but don't do much.  Too bad it was a lot of fun.
 

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What do you guy's consider a fuel pig?  My 00 Pantera and 00 ZL both get 10- 12 mpg. Have a buddy with a 99 Polaris 700 XCR that gets 4-5 mpg, now that I consider to be a gas hog![/b]
I think I get 8-9mpg on my 95 zr 580 efi.  Consumes oil to.  I think they set these to run rich.  I started running br9eya plugs vs the br9es and i haven't fouled a plug in 700 miles.
 

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i have a 96 ZR 580 EFI and i ride with a 99 ZL 600 EFI 2000 ZR 600 EFI 2001 ZR 600 EFI and a 98 ZL 500 carb and the 580 never uses anymore gas than those machines i'm guessing that i always get right around 10 or 11 no matter what
 

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I have a '95 580EFI with about 2000 mi. on it.  Up to this point, the motor has never given me any serious problems.  The only thing I've experienced is an electical problem that would put it into "limp mode".  I think it was a sensor. Dealer fixed it, but I can't remember what the exact cause was.  Hasn't happened again.  10 mpg (not great, but could be worse).  Always starts 1st or 2nd pull, and always runs spot-on.  I know many guys who've had '95's and '97's with no problems at all.  The one thing I've heard with the 580 though is to plan on new pistons @ rings at about 3000 mi (before it burns down or blows up).
 

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Mine had over 6000 miles on it, and I never had any engine problems.  Like I said, gas pig 8mpg, compared to my buddies who were all getting 12-15, for the same type of ridding.

FishHog
 

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Had a 97 pantera 580 efi lost one cylinder in Maine Feb 00
4300 miles ring locater pin wore out and let rings turn and snaged exhaust port ruined cylinder Jan 01 lost the other one at about 4700 miles same problem called Arctic Cat tech they suggested new pistons about every 3000 miles but I never seen that in writing All I know now is I would do both at one time or at least tear down and freshen up if I had trouble with a cylinder
Have A 00 Triple Touring now with about 3100 miles not touching it got 125 lbs compression all 3 cold eng. and hope for the best
Any one need 2 scored 580 cylinders
 

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Me and my father both own 95 ext 580 efi's. Mine blew up with 3600 miles on it. Locator pin disappeared and the ring popped out, caught the exhaust port and chewed up the cylinder. Over $1000 repair. Dads blew up at the beginning of January of this year with 3400 miles on it. Both piston skirts cracked on the intake side. One skirt dropped into the crankcase but did no serious damage. Both machines are stock and well cared for. Other problems include batteries on both(vibrating out of the tray and pulling cables out), Sensors on dads(not sure which ones), and i blew2 the clutch out of mine.
 

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MY 96 580 efi cat has almost 4200 miles and has never had a problem. I hope to repiston it this summer to avoid the dreaded piston skirt breakage that is so common on these sleds. I would highly reccomend this sled though and I would take it over the carbed version any day. Its much crisper on the bottom and midrange and always runs spot-on. I was riding yesterday with a bunch of carbed sleds and it was a warm and foggy day. Mine ran great and their's were all farting and snarking and running boggy - I hosed a 600 powder extreme and a 700 RMK on the hillclimbs too! Gotta like it!
 
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