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post #1 of 21 (permalink) Old 01-01-2013, 03:11 PM Thread Starter
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580 or 600 engine?

how do i tell if my sled has the 580 motor or 600? I am trying to jet my carbs and I need to know which engine i have... My sled is a 1994 XLT tripple. now that i am doing research i am under the impression this is a terrible engine that is VERY finicky about its jets. it is a totally stock motor with SLP pipes. my elevation varys between 2200 and 2600 ft.
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post #2 of 21 (permalink) Old 01-01-2013, 04:50 PM
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The XLT/XCR monoblock triple was 579cc 1993-'94, bored out to 597cc in 1995+. You have a 580.

The XLT motors have a history of short life with pipes or generally any major modifications. Good motor stock, but not very accomodating to more power.

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post #3 of 21 (permalink) Old 01-01-2013, 05:03 PM Thread Starter
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just to clairfy...the only reason i am calling it a '94 is because the serial # plate is stampted manufactured in 091994 or september 1994
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post #4 of 21 (permalink) Old 01-01-2013, 05:07 PM
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If it says 1994 on the vin plate than its a 1995. If thats the case than its the 600. There should be #'s at the base of the cylinders telling you what cc your engine is.
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post #5 of 21 (permalink) Old 01-01-2013, 05:07 PM Thread Starter
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it does have one block that houses 3 pistons so I am guessing that is a monoblock. the 597cc is NOT a monoblock?
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post #6 of 21 (permalink) Old 01-01-2013, 05:10 PM Thread Starter
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i am gonna have to go look at it again. the cc #'s are underneath the exhaust at the bottom of the cylinders?
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post #7 of 21 (permalink) Old 01-01-2013, 05:13 PM
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Yes, a 1994 build is a 1995 model year. They both used the same monoblock.

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post #8 of 21 (permalink) Old 01-01-2013, 09:13 PM
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good luck with those pipes, be darn sure you have the correct jets! i would also buy the correct clutch weights to match everything up. done correctly, those slp pipes could add 25hp or so.

1987 chasis with 1985 597cc under the hood. Xtra-10, fox shocks, and a whole lotta speed!

Last edited by BC_Dan; 01-03-2013 at 12:32 AM. Reason: language
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post #9 of 21 (permalink) Old 01-01-2013, 09:18 PM Thread Starter
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Do I sense sarcasam in your response? A guy i know totaled his sled and gave em to me for free. Maybe I should ask for his clutch as well...or just not use the pipes


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post #10 of 21 (permalink) Old 01-01-2013, 10:59 PM
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Originally Posted by ringneckryan View Post
Do I sense sarcasam in your response? A guy i know totaled his sled and gave em to me for free. Maybe I should ask for his clutch as well...or just not use the pipes


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No sarcasm. I would not use the pipes until i atleast have the correct jets. The weights just help proformance because with more power your clutch can proform better adjusted correctly. Good luck!

1987 chasis with 1985 597cc under the hood. Xtra-10, fox shocks, and a whole lotta speed!
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post #11 of 21 (permalink) Old 01-01-2013, 11:14 PM
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I wouldn't take the chance, jetting aside; it's just not a beefy motor. An Ultra 680 or even an older 650 is more suited for pipes and big power.

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post #12 of 21 (permalink) Old 01-01-2013, 11:32 PM Thread Starter
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I wouldn't take the chance, jetting aside; it's just not a beefy motor. An Ultra 680 or even an older 650 is more suited for pipes and big power.
All I am doing is flat land riding and ice lake riding. I am not doing any hill or mountain riding. Is flat land riding gonna be too much stress to the crank with a stock engine with these pipes?


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post #13 of 21 (permalink) Old 01-01-2013, 11:39 PM Thread Starter
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i should also note the sled has not been rode because I know the jetting has to be right to ensure I dont melt pistons. it has been started but not even warmed up
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post #14 of 21 (permalink) Old 01-01-2013, 11:54 PM
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I can't find the PDF article but remember reading about slp triple pipes, jetting, clutch weights, and how the right combination will get you 110hp out of the 597. The same article also stated that this combination causes the power band to be raised to the 9000rpm range and because of the monoblock crank oiling and design the crank will not tolerate this over rev and extra power for very long. Mid 90's XLT motors were notorious for crank failure but mostly due to people trying to get more hp out of them. I suggest keeping the stock set up if you want any longevity from your 597.

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post #15 of 21 (permalink) Old 01-02-2013, 04:49 PM
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everything I read about those triples says don't mess with trying to get more out of them than stock,,unless you got deep pockets,,,,,
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post #16 of 21 (permalink) Old 01-02-2013, 11:25 PM
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I owned both a 94 and 95 XLT (bought both new) and rode a 97 XLT at work. All ran stock pipes for 6-10 years with no problems. I put 3100 miles on the 94 in the first season. I also know a bunch of guys who piped theirs (9000-9200 rpm) who did not even get 1 season out of them. I would recommend staying with the stock pipe.
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post #17 of 21 (permalink) Old 01-03-2013, 12:35 AM
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I bet it was fun while it lasted

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post #18 of 21 (permalink) Old 01-03-2013, 08:46 PM
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pipe it. get the correct jets (290 if i remember) and change the clutch weights. run a polaris blue primary spring and silver/blue secondary spring. 42/36helix and your xlt will be the most fun you have ever had on the trails.

579cc xlt was a rugged engine. 597cc was good, but had oil issues. the transfer ports were not large enough and the clutch bearing on the crank could get starved for oil. there were a lot of people that had issues with the xlt (piped or stock) but you have to remember this was the most popular polaris sled for years. more sleds out there=more horror stories.

the stock xlt is good for 8000-8200rpm max. above that the harmonics become hard on the crank and bearings for long amounts of time BUT pipes push the rpm range ABOVE the harmonics problem zone and smooth the engine out at WOT.

i had SLP triples on my 95 XCR and loved it. very fun sled and to me, the extra 25hp was worth the tuning required.

the "never put pipes on a triple" is bulls$%. some engines handle them better than others but IMO a triple/triple is the only way to go
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post #19 of 21 (permalink) Old 01-03-2013, 09:34 PM Thread Starter
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what is the difference between the xcr and xlt? is it the same engine or a little different? i dont know what WOT means or IMO im sorry. im not up on computer lingo i guess...haha. the SLP website says to run 240 jets with my elevation. I put in 250's today because I think id rather run rich than lean. I already melted pistons in the first engine this season cause I wasnt educated on jetting and its importance (to lean). when you talk about the oil ports on the crank do i need to do some mods on it as well? to be honest im about sick of workin on this thing but there is no way I can justify 15K on a new sled! I should also add that a buddy has an xcr with pipes and he runs 240 jets.
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post #20 of 21 (permalink) Old 01-03-2013, 11:53 PM
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The XCR and XLT 600 engines are the same depending on the year...mid 90s they're the same. The difference on some years is some of the XCR engines were case reed and XLT engines are all piston port.
WOT is Wide Open Throttle.
IMO is In My Opinion.
Some people enlarged the oil ports for the clutch side crank bearing to reduce the chance of failure. I also heard of adding a oil line with a port directly to the clutch side crank bearing but have never seen this myself. Jetting is a fine line....too rich and foul plugs, too lean and burn pistons. Start rich and work your way lean when you experiment. It's a lot cheaper for some jets and plugs than it is to replace burned pistons.

Here is a link that will help with the triple pipes...

http://www.startinglineproducts.com/...ts/09-5970.pdf

Here is a link covering crank failures and engine assignments...

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94 Polaris XLT - XTRA 10, Ski Skins, 3" riser
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96 Ski Doo Formula III 600 (sold)
97 Polaris XLT Limited - XTRA 12 (My Son's)
80 Kawasaki Intruder (sold)
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